W. Baumann

发表

Phase-transformation kinetics of TiCr2 laves phases

W. Baumann, 2010 .

Layer-stacking irregularities in C36-type Nb–Cr and Ti–Cr Laves phases and their relation with polytypic phase transformations

E. .. Mittemeijer, V. Duppel, A. Leineweber, 2010 .

Unravelling the Mechanism of Basic Aqueous Methanol Dehydrogenation Catalyzed by Ru-PNP Pincer Complexes.

M. Beller, M. Nielsen, H. Jiao, 2016, Journal of the American Chemical Society.

Ammine and amido complexes of rhodium: Synthesis, application and contributions to analytics

W. Baumann, H. Drexler, M. Horstmann, 2020 .

ortho-Metalation of iron(0) tribenzylphosphine complexes: homogeneous catalysts for the generation of hydrogen from formic acid.

R. Ludwig, M. Beller, R. Jackstell, 2010, Angewandte Chemie.

Multi-component coupling reactions of aldehydes and amides with maleic anhydride: synthesis of 7-oxo-6-azabicyclo[3.2.1]oct-2-ene-8-carboxylic acids

H. Neumann, M. Beller, D. Goerdes, 2002 .

Chiral β-Amino Acid Derivatives via Asymmetric Hydrogenation

C. Fischer, J. You, W. Baumann, 2003 .

[Cp2V] Migration along an Octatetrayne Chain: From the Monometallic Complex [Cp2V(3-4η-tBuC≡C−C2−C≡CC≡CtBu)] to the Dimetallic Complex [(Cp2V)2(1-2η:7-8η-tBuC2−C≡CC≡C−C2tBu)]

B. Donnadieu, R. Choukroun, C. Lorber, 2000 .

β-Alkoxy- and β-Hydroxyalkylphosphanes as Ligands in the Stereoselective Hydrogenation — A Comparison

A. Börner, A. Kless, W. Baumann, 1995 .

Reactions of Group 4 metallocene complexes with mono- and diphenylacetonitrile: formation of unusual four- and six-membered metallacycles.

H. Jiao, W. Baumann, A. Spannenberg, 2013, Chemistry.

Si-H bond activation of alkynylsilanes by group 4 metallocene complexes.

H. Jiao, C. Fischer, Martin Lamač, 2010, Journal of the American Chemical Society.

Tandem Si-C and C-H activation for decamethylhafnocene and bis(trimethylsilyl)acetylene.

Stephan Peitz, E. Jemmis, B. Pathak, 2007, Angewandte Chemie.

Investigations into the formation and stability of cationic rhodium diphosphane η6-arene complexes.

W. Baumann, H. Drexler, D. Heller, 2012, Chemistry.

Crystal structure of bis(η5-cyclopentadienyl)(2,3-diethylbutane-1,4-diyl)hafnium(IV)

W. Baumann, A. Spannenberg, V. Burlakov, 2015, Acta crystallographica. Section E, Crystallographic communications.

Untypical Regioselectivity of Carbon Dioxide Coupling with Titanocene Complexes of Phenyl(trimethylsilyl)acetylene by Using the meso-1,2-Ethylene-1,1′-bis(η5-tetrahydroindenyl) Ligand System

W. Baumann, A. Spannenberg, R. Kempe, 1998 .

Motional anisotropy‐induced unequal deuterium NMR spin‐lattice relaxation of 3α‐deuteriocholesterol and 3β‐deuterioepi‐cholesterol in solution as a measure of sterol motion about the molecular axis

R. Murari, M. P. Murari, W. Baumann, 1985 .

Catalytic hydrogenation of carbon dioxide and bicarbonates with a well-defined cobalt dihydrogen complex.

M. Beller, R. Jackstell, W. Baumann, 2012, Chemistry.

Nickel-catalyzed hydrogenative coupling of nitriles and amines for general amine synthesis

M. Beller, R. V. Jagadeesh, W. Baumann, 2022, Science.

Iridium–PNP Pincer Complexes for Methanol Dehydrogenation at Low Base Concentration

M. Beller, H. Junge, E. Alberico, 2017 .

Part III. COD versus NBD precatalysts. Dramatic difference in the asymmetric hydrogenation of prochiral olefins with five-membered diphosphine Rh-hydrogenation catalysts

C. Fischer, W. Baumann, A. Spannenberg, 2001 .

NMR and DFT analysis of the major diastereomeric degradation product of clopidogrel under oxidative stress conditions

H. Jiao, W. Baumann, Everaldo F Krake, 2021, Journal of Molecular Structure.

Heteroatom-substituted secondary phosphine oxides (HASPOs) as decomposition products and preligands in rhodium-catalysed hydroformylation.

A. Börner, D. Selent, R. Franke, 2011, Chemistry.

Hydrogen generation: catalytic acceleration and control by light.

M. Beller, H. Junge, W. Baumann, 2009, Chemical communications.

103Rh Chemical Shifts in Complexes Bearing Chelating Bidentate Phosphine Ligands

W. Leitner, E. Dinjus, M. Bühl, 1999 .

Cationic Rhodium-BINAP Complexes: Full Characterization of Solvate- and Arene-Bridged Dimeric Species

W. Baumann, C. Kohrt, H. Drexler, 2011 .

Synthesis, complexation behavior and application of a new diphosphite ligand in rhodium-catalyzed hydroformylation

A. Börner, D. Selent, R. Franke, 2011 .

REACTIONS OF THE PHENYL-SUBSTITUTED FIVE-MEMBERED TITANACYCLOCUMULENE-UNUSUAL COUPLING OF A 1,4-DISUBSTITUTED 1,3-BUTADIYNE WITH TWO TITANIUM ATOMS

W. Baumann, A. Spannenberg, R. Kempe, 1997 .

REACTIONS OF TITANOCENE- AND ZIRCONOCENE- BIS(TRIMETHYLSILYL)ACETYLENE COMPLEXES WITH SELECTED HETEROCYCLIC AND AROMATIC NH AND OH ACID COMPOUNDS

W. Baumann, A. Spannenberg, V. Burlakov, 2007 .

Unusual Nitrile–Nitrile and Nitrile–Alkyne Coupling of FcCN and FcCCCN

H. Lang, M. Korb, W. Baumann, 2014 .

Configuration and conformation of the long-chain cyclic acetals of glycerol

W. Baumann, 1971 .

Progress in the palladium-catalyzed cyanation of aryl chlorides.

M. Beller, W. Baumann, A. Zapf, 2003, Chemistry.

HCOOH disproportionation to MeOH promoted by molybdenum PNP complexes

J. Seifert, M. Beller, H. Junge, 2021, Chemical science.

Rhodium-complex-catalyzed asymmetric hydrogenation: transformation of precatalysts into active species.

A. Börner, W. Baumann, A. Spannenberg, 2008, Chemistry.

Fatty Ester-Based Hydroxy Carbamates - Synthesis and Investigation as Lubricant Additives

B. Schäffner, W. Baumann, A. Köckritz, 2018, European Journal of Lipid Science and Technology.

Kinetics of the allotropic hcp–fcc phase transformation in cobalt

E. .. Mittemeijer, E. Jägle, W. Baumann, 2011 .

Ball milling - a new concept for predicting degradation profiles in active pharmaceutical ingredients.

U. Holzgrabe, C. Bolm, R. Kaiser, 2021, Chemical communications.

Asymmetric Hydrogenation of Nonfunctionalized Olefins in Propylene Carbonate—Kinetic or Thermodynamic Control?

A. Börner, S. Verevkin, V. N. Emel’yanenko, 2012 .

A highly tunable family of chiral bisphospholanes for rh-catalyzed enantioselective hydrogenation reactions.

A. Börner, H. Jiao, W. Baumann, 2006, Chemistry.

Selective Oxidation of Clopidogrel by Peroxymonosulfate (PMS) and Sodium Halide (NaX) System: An NMR Study

W. Baumann, Everaldo F Krake, 2021, Molecules.

Complexes [(P2)Rh(hfacac)] as Model Compounds for the Fragment [(P2)Rh] and as Highly Active Catalysts for CO2 Hydrogenation: The Accessible Molecular Surface (AMS) Model as an Approach to Quantifying the Intrinsic Steric Properties of Chelating Ligands in Homogeneous Catalysis†

W. Leitner, E. Dinjus, M. Kessler, 1997 .

In Situ Synthesis of Neutral Dinuclear Rhodium Diphosphine Complexes [{Rh(diphosphine)(μ2‐X)}2]: Systematic Investigations

W. Baumann, A. Spannenberg, H. Drexler, 2015 .

Catalytic and Structural Features of Hydroxy and Methoxy Groups as Hemilabile Coordinating Ligands in Chiral (Diphosphane)rhodium(I) Hydrogenation Catalysts

A. Börner, W. Baumann, A. Spannenberg, 1998 .

Hydrogenation of nitroarenes using defined iron-phosphine catalysts.

M. Beller, R. Jackstell, K. Junge, 2013, Chemical communications.

Control of Bridging Ligands in [(V2O3)2(RXO3)4⊂F]− Cage Complexes: A Unique Way To Tune Their Chemical Properties

J. Radnik, H. Jiao, U. Bentrup, 2014 .

Silica accumulation in Triticum aestivum L. and Dactylis glomerata L.

G. Marx, O. Wienhaus, D. Dietrich, 2003, Analytical and bioanalytical chemistry.

Simple ruthenium-catalyzed reductive amination enables the synthesis of a broad range of primary amines

H. Neumann, M. Beller, T. Senthamarai, 2018, Nature Communications.

Multiple and Highly Selective Alkyne-Isonitrile C-C and C-N Couplings at Group 4 Metallocenes.

W. Baumann, A. Spannenberg, F. Reiß, 2016, Chemistry.

Migratory Insertion of an Isocyanide into 1-Zirconacyclopent-3-ynes

W. Baumann, T. Beweries, V. Burlakov, 2007 .

Reactions of Tetraalkynylsilanes (RC⋮C)4Si (R = Ph, tBu, SiMe3) with Titanocene and Zirconocene Complexes

W. Baumann, V. Burlakov, U. Rosenthal, 2000 .

Five-Membered Titana- and Zirconacyclocumulenes: Stable 1-Metallacyclopenta-2,3,4-trienes

W. Baumann, A. Spannenberg, V. Burlakov, 2005 .

Reactions of five-membered zirconacyclocumulenes with tris(pentafluorophenyl)borane: Carbon-carbon double bond cleavage and formation of novel zwitterionic complexes

W. Baumann, A. Spannenberg, V. Burlakov, 2004 .

Room-temperature catalytic hydrodefluorination of pentafluoro-pyridine by zirconocene fluoro complexes and diisobutylaluminumhydride

W. Baumann, A. Spannenberg, V. Burlakov, 2007 .

N-heterocyclic carbenes which readily add ammonia, carbon monoxide and other small molecules,

G. Frenking, D. Selent, U. Siemeling, 2010 .

Mild and selective hydrogenation of aromatic and aliphatic (di)nitriles with a well-defined iron pincer complex

M. Beller, H. Jiao, H. Junge, 2014, Nature Communications.

New chiral monodentate phospholane ligands by highly stereoselective hydrophosphination

A. Börner, I. Komarov, W. Baumann, 2006 .

New pentacoordinated rhodium species as unexpected products during the in situ generation of dimeric diphosphine-rhodium neutral catalysts.

W. Baumann, H. Drexler, D. Heller, 2014, Chemistry.

Unusual deactivation in the asymmetric hydrogenation of itaconic acid

T. Schmidt, W. Baumann, H. Drexler, 2009 .

Low-temperature aqueous-phase methanol dehydrogenation to hydrogen and carbon dioxide

M. Beller, M. Nielsen, H. Junge, 2013, Nature.

Selective Catalytic Hydrogenations of Nitriles, Ketones, and Aldehydes by Well-Defined Manganese Pincer Complexes.

R. Ludwig, M. Beller, C. Topf, 2016, Journal of the American Chemical Society.

Hydrogenation of esters to alcohols with a well-defined iron complex.

M. Beller, H. Jiao, F. Gallou, 2014, Angewandte Chemie.

Novel Amidoniobium Complexes with a Functional Relationship to the [Cp2 ZrR]+ Ion.

W. Baumann, A. Spannenberg, R. Kempe, 1998, Angewandte Chemie.

Selective hydrogen production from methanol with a defined iron pincer catalyst under mild conditions.

M. Beller, M. Nielsen, P. Sponholz, 2013, Angewandte Chemie.

Interaction of titanium(III) zwitterionic complex Cp[η5-C5H4B(C6F5)3]Ti with organic halides: Synthesis and X-ray crystal structure determination of zwitterionic titanocene monohalides Cp[η5-C5H4B(C6F5)3]TiX (X = Cl, Br) and their catalytic activity in the ring-opening polymerization of ε-caprolacto

K. Lyssenko, V. Shur, W. Baumann, 2006 .

NNP-Type Pincer Imidazolylphosphine Ruthenium Complexes: Efficient Base-Free Hydrogenation of Aromatic and Aliphatic Nitriles under Mild Conditions.

M. Beller, R. Jackstell, H. Junge, 2016, Chemistry.

Combination of spectroscopic methods: in situ NMR and UV/Vis measurements to understand the formation of group 4 metallacyclopentanes from the corresponding metallacyclopropenes.

Stephan Peitz, Wolfgang Baumann, Anke Spannenberg, 2009, Journal of the American Chemical Society.

Bis(trimethylsilyl)acetylene Complexes of Titanocenes and Zirconocenes: Their Recent Chemistry and Reactions with Lewis Acids

V. Shur, W. Baumann, A. Spannenberg, 2004 .

Stability of Bridged and Unbridged η2-Alkyne−titanocene and −zirconocene Complexes − Influence of Metals, Alkyne Substituents, Cp Substitution and Additional Ligands

W. Baumann, R. Kempe, V. Burlakov, 1998 .

ansa-Titanocene and -Zirconocene η2-Alkyne Complexes -Synthesis, Spectral Characteristics, and X-ray Crystal Structure

W. Baumann, R. Kempe, V. Burlakov, 1996 .

Ring‐Opening Reaction of a Dihydrozirconafuran (= 2,5‐Dihydro‐1,2‐oxazirconole): An equilibrium studied by NMR methods, and its chemical consequences

W. Baumann, A. Ohff, M. Ebener, 1996 .

The First Titanacyclic Five‐Membered Cumulene. Synthesis, Structure, and Reactivity

W. Baumann, R. Kempe, V. Burlakov, 1995 .

Reactions of Five-Membered Zirconacyclocumulenes with Diisobutylaluminum Hydride

W. Baumann, V. Burlakov, U. Rosenthal, 2004 .

Reactions of Zirconocene−Alkyne Complexes with Polar Functionalized Olefins†

W. Baumann, A. Spannenberg, V. Burlakov, 2002 .

Synthesis and Structural Investigation of Stable Zirconacyclopentanes Which Bear Additional Functional Groups

A. Arndt, W. Baumann, A. Spannenberg, 2001 .

Reactivity of Permethylzirconocene and Permethyltitanocene toward Disubstituted 1,3-Butadiynes: η4- vs η2-Complexation or C−C Coupling with the Permethyltitanocene

W. Baumann, V. Burlakov, U. Rosenthal, 1999 .

The Influence of the Ligands Cp*(η5-C5Me5) and Cp(η5-C5H5) on the Stability and Reactivity of Titanocene and Zirconocene Complexes: Reactions of the Bis(trimethylsilyl)acetylenePermethylmetallocene Complexes (η5-C5Me5)2M(η2-Me3SiC2SiMe3), M = Ti, Zr, with H2O and CO2

W. Baumann, A. Spannenberg, V. Burlakov, 1999 .

Dimerization of titanacyclocumulenes to titanium substituted radialenes: synthesis, stability and reactions of five-membered titanacyclocumulenes with a coupling of two 1,4-diphenyl-1,3-butadiyne between two titanocene molecules to radialene-like fused titanacyclopentadiene compounds

W. Baumann, A. Spannenberg, R. Kempe, 1999 .

Zirconocene and rac-[1,2-Ethylene-1,1‘-bis(η5-tetrahydroindenyl)]zirconium Complexes of 2-Vinylpyridine: Syntheses, X-ray Crystal Structures, and Reactions with H2CCH2, H2O, HBF4, and CO2

W. Baumann, A. Spannenberg, R. Kempe, 1998 .

Stable rac-[1,2-Ethylene-1,1‘-bis(η5-tetrahydroindenyl)]- zirconacyclopentanes. Syntheses, X-ray Crystal Structures, Stability, and Catalysis of Ethylene Polymerization

W. Baumann, D. Heller, R. Kempe, 1997 .

Group IV Metallocene Bis(trimethylsilyl)acetylene Complexes as Catalysts in the Dehydrocoupling Polymerization of 1,2-Disubstituted Hydrodisilanes

Christoph Marschner, W. Baumann, Florian Lunzer, 1999 .

Efficient Base-Free Hydrogenation of Amides to Alcohols and Amines Catalyzed by Well-Defined Pincer Imidazolyl–Ruthenium Complexes

M. Beller, H. Junge, E. Alberico, 2016 .

Formation of zirconocene fluoro complexes: No deactivation in the polymerization of olefins by the contact-ion-pair catalysts [Cp'2ZrR]+)[RB(C6F5)3]-.

W. Baumann, A. Spannenberg, V. Burlakov, 2006, Angewandte Chemie.

Reactions of Zirconocene 2-Vinylpyridine Complexes with Diisobutylaluminum Hydride and Fluoride

W. Baumann, A. Spannenberg, U. Rosenthal, 2004 .

1-Titanacyclobuta-2,3-diene – an elusive four-membered cyclic allene

H. Jiao, W. Baumann, A. Spannenberg, 2019, Chemical science.

Zwitterionic titanoxanes {Cp[η5-C5H4B(C6F5)3]Ti}2O and {(η5-iPrC5H4)[η5-1,3-iPrC5H3B(C6F5)3]Ti}2O as catalysts for cationic ring-opening polymerization

Y. Vygodskii, V. Shur, W. Baumann, 2003 .

Simple Functionalizations of Pentamethylcyclopentadienyl Ligands by Reactions of Decamethylzirconocene Complexes with Carbon Dioxide

W. Baumann, V. Burlakov, U. Rosenthal, 2006 .

Reactivity of functionalised decamethyltitanocenes: Synthesis and structure of chiral monocyclopentadienyl titanium halogenides

K. Lyssenko, V. Shur, W. Baumann, 2013 .

Bimetallic Titanocene or Zirconocene/Aluminium Complexes as Active Catalysts in Lactone Polymerization Reactions

S. Becke, W. Baumann, A. Spannenberg, 2001 .

Kinetic and mechanistic investigations in homogeneous catalysis using operando UV/vis spectroscopy

Stephan Peitz, Wolfgang Baumann, Uwe Rosenthal, 2010 .

Formation, Operation and Deactivation of Cr Catalysts in Ethylene Tetramerization Directly Assessed by Operando EPR and XAS

M. Bauer, D. Selent, W. Gabrielli, 2013 .

Utilization of common ligands for the ruthenium-catalyzed amination of alcohols.

Andreas Martin, J. Pfeffer, T. Haas, 2013, Chemistry.

Oxidative addition of CH2Cl2 to neutral dimeric rhodium diphosphine complexes

M. Ferro, Alberto Mannu, W. Baumann, 2018, Journal of Organometallic Chemistry.

A novel domino synthesis of quinazolinediones by palladium-catalyzed double carbonylation.

H. Neumann, M. Beller, Xiao‐Feng Wu, 2014, Chemistry.

In Situ FTIR and NMR Spectroscopic Investigations on Ruthenium-Based Catalysts for Alkene Hydroformylation.

A. Börner, C. Kubis, D. Selent, 2016, Chemistry.

Synthesis of novel rhodium phosphite catalysts for efficient and selective isomerization–hydroformylation reactions

R. Franke, M. Beller, R. Jackstell, 2010 .

Palladium-Catalyzed Methoxycarbonylation of 1,3-Butadiene: Catalysis and Mechanistic Studies

M. Beller, W. Baumann, A. Krotz, 2002 .

On the Tautomerism of Secondary Phosphane Oxides

M. Garland, A. Börner, D. Selent, 2010 .

Reactions of Aliphatic Methanesulfonates. II. Syntheses of Long-Chain Di- and Trialkyl Glyceryl Ethers1

H. Mangold, W. Baumann, 1966 .

Reactions of Aliphatic Methanesulfonates. I. Syntheses of Long-Chain Glyceryl-(1) Ethers1

H. Mangold, W. Baumann, 1964 .

Synthesis and Characterisation of Selected Group 4 Metallocene Complexes with 1,2-Bis(4′,4′,5′,5′-tetramethyl[1′,3′,2′]dioxaborolan-2′-yl)acetylene

W. Baumann, A. Spannenberg, U. Rosenthal, 2013 .

The molecular structure of Cr[(CH2)2PMe2]3: dimethylphosphonium-bis-methylide chromium compounds as inner-phosphonium-alkyl-ate- or 2-phospha-allyl-complexes?

W. Baumann, A. Spannenberg, U. Rosenthal, 2003 .

Synthesis of Hafnacyclopentanes from Hafnocene Alkyne Complexes: Influence of Styrene Substituents on the C-C Coupling Regioselectivity

W. Baumann, A. Spannenberg, T. Beweries, 2009 .

The first chiral early-late heterobimetallic complex — A titanium(IV)-palladium(II) complex based on salenophos

A. Börner, A. Kless, W. Baumann, 1996 .

Perfluoroalkyl‐Substituted Arylphosphanes as Ligands for Homogenous Catalysis in Supercritical Carbon Dioxide

W. Leitner, D. Koch, S. Kainz, 1997 .

The Titanocene Complex of Bis(trimethylsilyl)acetylene: Synthesis, Structure, and Chemistry†

W. Baumann, A. Spannenberg, V. Burlakov, 2003 .

Improved Second Generation Iron Pincer Complexes for Effective Ester Hydrogenation

M. Beller, C. Topf, H. Jiao, 2016 .

Hydrogenation of Esters to Alcohols with a Well‐Defined Iron Complex.

M. Beller, H. Jiao, F. Gallou, 2015 .

Early transition-metal complexes of α-keto-stabilized phosphorus ylides†

W. Baumann, A. Spannenberg, U. Rosenthal, 2000 .

Stereoselective Synthesis of Highly Substituted Conjugated Dienes via Pd-Catalyzed Carbonylation of 1,3-Diynes.

M. Beller, R. Jackstell, W. Baumann, 2019, Angewandte Chemie.

Dynamic Behaviour of Tetramethylethylene Diamine (TMEDA) Ligands in Solid Organolithium Compounds: A Variable Temperature 13C and I5N CP/MAS NMR Study

H. Günther, Y. Oprunenko, W. Baumann, 1995 .

Rhodium diphosphine complexes: a case study for catalyst activation and deactivation

E. Alberico, W. Baumann, H. Drexler, 2014 .

How Long Have Nonlinear Effects Been Known in the Field of Catalysis

B. Heller, C. Fischer, W. Baumann, 2000 .

Asymmetric Hydrogenation. Dimerization of Solvate Complexes: Synthesis and Characterization of Dimeric [Rh(DIPAMP)]22+, a Valuable Catalyst Precursor

T. Schmidt, W. Baumann, H. Drexler, 2009 .

Calix[4]arene‐based Bis‐phosphonites, Bis‐phosphites, and Bis‐O‐acyl‐phosphites as Ligands in the Rhodium(I)‐catalyzed Hydroformylation of 1‐Octene

A. Börner, D. Selent, W. Baumann, 2002 .

Synthesis of non proteinogenic dipeptides by asymmetric hydrogenation

W. Baumann, C. Döbler, Christoph S. Fischer, 2005, Amino Acids.

Trinuclear rhodium complexes and their relevance for asymmetric hydrogenation.

W. Baumann, A. Spannenberg, H. Drexler, 2008, Chemistry, an Asian journal.

Novel contributions to the mechanism of the enantioselective hydrogenation of dimethyl itaconate with rhodium complexes.

C. Jäger, T. Schmidt, W. Baumann, 2008, Chemistry.

About the crystal structure of [Rh((S,S)-DIPAMP)-((Z)-2-benzoylamino-3-(3,4-dimethoxyphenyl)-methyl acrylate)]BF4 : Major or minor catalyst-substrate complex?

T. Schmidt, W. Baumann, H. Drexler, 2005 .

Are beta-acylaminoacrylates hydrogenated in the same way as alpha-acylaminoacrylates?

T. Schmidt, C. Fischer, Ailing Sun, 2005, Angewandte Chemie.

The inhibiting influence of aromatic solvents on the activity of asymmetric hydrogenations.

B. Heller, J. You, W. Baumann, 2002, Angewandte Chemie.

Synthesis and characterization of permethylated 1,3,5-tri- and 1,3,5,7-tetracarbonyl compounds

A. Börner, P. Langer, D. Michalik, 2011 .

Synthesis and characterization of bis-cyclopropanated 1,3,5-tricarbonyl compounds. A combined synthetic, spectroscopic and theoretical study.

M. Hein, A. Börner, P. Langer, 2011, Organic & biomolecular chemistry.

Synthesis of chromones and 4-hydroxyquinolines based on uncatalyzed condensations of 1-methoxy-1,3-bis(trimethylsilyloxy)-1,3-butadiene with 2-alkoxy- and 2-nitrobenzoyl chlorides and related reactions.

A. Börner, P. Langer, H. Jiao, 2009, Organic & biomolecular chemistry.

Synthesis and Characterization of Cyclopropylpolyketides: A Combined Experimental and Theoretical Study

P. Langer, H. Jiao, T. Rahn, 2008 .

Selective Hydrogenation of α,β-Unsaturated Aldehydes and Ketones by Air-Stable Ruthenium NNS Complexes.

W. Bonrath, M. Beller, Sandra Hinze, 2017, Chemistry.

Synthesis of ansa-Dimethylsilanediyl−dicyclopentadienyl− zirconacyclopent-3-yne, Me2Si(η5-C5H4)2Zr(η4-H2C4H2), and Its Reactions with Ni(0) and B(C6F5)3†

W. Baumann, T. Beweries, V. Burlakov, 2007 .

Nickel(0) Complexes of a 1-Zirconacyclopent-3-yne

W. Baumann, V. Burlakov, U. Rosenthal, 2005 .

Reactions of titanium and zirconium derivatives of Bis(trimethylsilyl)acetylene with Tris(pentafluorophenyl)borane: a titanium(III) complex of an alkynylboranate.

V. Shur, W. Baumann, A. Spannenberg, 2003, Angewandte Chemie.

Synthesis and Reactions with Carbon Dioxide of Mono(σ-alkynyl) Titanocene(III) Complexes Cp* 2 Ti(C⋮CR) (R = Me, t- Bu) and the Corresponding “Ate” Complexes [Cp* 2 Ti(C⋮CR) 2 Li(THF) n ] (R = SiMe 3 , t- Bu, Ph)

W. Baumann, A. Spannenberg, V. Burlakov, 2001 .

Synthesis and X-ray Crystal Structure Determination of New Zwitterionic Complexes of Titanocene

K. Lyssenko, V. Shur, A. Korlyukov, 2001 .

Reactions of permethylmetallocene alkyne complexes of titanium and zirconium with tris(perfluorophenyl)borane

V. Shur, W. Baumann, A. Spannenberg, 2000 .

Synthesis and Characterization of Chiral Group 4 Metallocene Alkyne Complexes: (η5-menthyl-C5H4)2M(η2-Me3SiC2SiMe3), M = Ti, Zr⊥

W. Baumann, A. Spannenberg, V. Burlakov, 2009 .

A New Diphosphite Promoting Highly Regioselective Rhodium-Catalyzed Hydroformylation

A. Börner, C. Kubis, D. Selent, 2011 .

Diastereoisomeric bisphosphite ligands in the hydroformylation of octenes: rhodium catalysis and HP-NMR investigations.

A. Börner, D. Selent, K. Wiese, 2008, Chemical communications.

Formation of the first heterobimetallic phosphido-bridged σ–π-acetylide complex [(C5H5)2Ti(µ–σ,η2-CCPh)(µ-PPh2)Ni(PPh3)] by cleavage of the central C–C single bond in PhCC–CCSiMe3 and of the P–C bond in Ph3P, and coupling of the fragments to PhCCSiMe3

W. Baumann, R. Kempe, A. Tillack, 1995 .

Oxidative Addition of Aryl Halides to Cationic Bis(phosphane)rhodium Complexes: Application in C–C Bond Formation

E. Alberico, W. Baumann, H. Drexler, 2017 .

Low-Temperature Hydrogenation of Carbon Dioxide to Methanol with a Homogeneous Cobalt Catalyst.

M. Beller, R. Jackstell, W. Baumann, 2017, Angewandte Chemie.

Well-defined iron catalyst for improved hydrogenation of carbon dioxide and bicarbonate.

M. Beller, R. Jackstell, W. Baumann, 2012, Journal of the American Chemical Society.

Unravelling the reaction path of rhodium-MonoPhos-catalysed olefin hydrogenation.

J. D. de Vries, E. Alberico, L. Lefort, 2011, Chemistry.

Synthesis of 9-N-cinchona alkaloid peptide hybrid derivatives: preparation and conformational study of 9-N-acylamino(9-deoxy)cinchona alkaloids.

M. Beller, W. Baumann, G. Mehltretter, 2003, Chirality.

Activation of metallacyclopropenes, five-membered metallacyclocumulenes and metallacyclopentynes of zirconium with iBu2AlH

W. Baumann, A. Spannenberg, V. Burlakov, 2006 .

Visiting the Limits between a Highly Strained 1-Zirconacyclobuta-2,3-diene and Chemically Robust Dizirconacyclooctatetraene.

H. Jiao, W. Baumann, A. Spannenberg, 2018, Chemistry.

Alkylation of Cyclododecanone with Allyl Acetate in the Presence of Solid Radical Initiators

J. Panten, R. Eckelt, W. Baumann, 2018, European Journal of Inorganic Chemistry.

Investigations into Metal Leaching from Polystyrene‐Supported Rhodium Catalysts

W. Baumann, H. Drexler, D. Heller, 2016 .

Simple Alumination Reactions of Pentamethylcyclopentadienyl Ligands in the Decamethylzirconocene−Bis(trimethylsilyl)acetylene Complex Cp*2Zr(η2-Me3SiC2SiMe3)

W. Baumann, V. Burlakov, U. Rosenthal, 2006 .

Complexation of bis(trimethylsilyl)acetylene by decamethylhafnocene to give the hafnacyclopropene Cp*2Hf (η2 -Me3Sic2SiMe3 ) : An unusually strong metal-alkyne interaction

W. Baumann, T. Beweries, V. Burlakov, 2007 .

Reduction of 1,4-dichlorobut-2-yne by titanocene to a 1,2,3-butatriene. Formation of a 1-titanacyclopent-3-yne and a 2,5-dititanabicyclo[2.2.0]hex-1(4)-ene.

E. Jemmis, P. Parameswaran, W. Baumann, 2004, Chemical communications.

Isolation of a labile homoleptic diazenium cation.

D. Michalik, A. Villinger, A. Schulz, 2014, Angewandte Chemie.

Five-membered titanacyclocumulenes that contain linked amido-cyclopentadienyl ligands

S. Becke, W. Baumann, A. Spannenberg, 2002 .

Crystal structure of dimeric bis(tetrahydroindenyl)-2-trimethylsilyl- 3-trìmetylsìloxacarbonyl-zìrconafuran-4-one, C56H80O8Si4Zr2

H. Sun, W. Baumann, V. Burlakov, 2002 .

Coordination Behavior and Reactivity of α‐Heterosubstituted Trimethylsilylalkynes at Titano‐ and Zirconocene

W. Baumann, A. Spannenberg, U. Rosenthal, 2014 .

Mechanistic Understanding of the Heterogeneous, Rhodium-Cyclic (Alkyl)(Amino)Carbene-Catalyzed (Fluoro-)Arene Hydrogenation

F. Glorius, M. Hansen, Mario P Wiesenfeldt, 2020, ACS catalysis.

Concerning the question of f- and d-electron interactions in heterodinuclear compounds: synthesis, structure and 103Rh NMR investigations of LaRh-bimetallics

A. Schulz, W. Baumann, R. Kempe, 2003 .

Novel Synthesis of Zirconocene Difluoride and Alkyl Monofluoride Complexes

S. Becke, W. Baumann, A. Spannenberg, 2004 .

Reactions of Hexatriynes with Permethyltitanocene and -zirconocene Complexes: First NMR Observation of a Metallocene Sliding along a Polyyne Chain

W. Baumann, V. Burlakov, U. Rosenthal, 2000 .

Novel Ti6, Zr3, and Zr6 Complexes from Branched Polyynes and Titanocene as Well as Zirconocene

W. Baumann, A. Spannenberg, R. Kempe, 1999 .

Si–H Activation in Titanocene and Zirconocene Complexes of Alkynylsilanes RC≡CSiMe2H (R=tBu, Ph, SiMe3, SiMe2H): A Model To Understand Catalytic Reactions of Hydrosilanes

W. Baumann, A. Spannenberg, R. Kempe, 1998 .

rac-[1,2-Ethylene-1,1‘-bis(η5-tetrahydroindenyl)][η2- bis(trimethylsilyl)acetylene]zirconium, the First Zirconocene−Alkyne Complex without Additional Ligands: Synthesis, Reactions, and X-ray Crystal Structure

H. Görls, W. Baumann, R. Kempe, 1996 .

Heterobimetallic .sigma.,.pi.-Acetylide-Bridged Complexes from Disubstituted 1,3-Butadiynes

W. Baumann, R. Kempe, V. Burlakov, 1995 .

Reactions of the Schiff Bases HN:CPh2 and PhN:CHPh with Titanocene- and Zirconocene-Generating Complexes

W. Baumann, R. Kempe, V. Burlakov, 1995 .

Synthesis and Structure of the Smallest Cyclic Cumulene; Reaction of 1,3‐Diynes with Zirconocene Complexes

W. Baumann, R. Kempe, V. Burlakov, 1994 .

Reaction of Disubstituted 1,3-Butadiynes R1C.tplbond.CC.tplbond.CR2 with Zirconocene Complexes: Cleavage of the Central C-C Single Bond to form Symmetrically and Unsymmetrically Doubly Acetylide-Bridged Metallocene Complexes

W. Baumann, R. Kempe, V. Burlakov, 1994 .

Dehydrocoupling of Silanes Catalyzed by Zirconocene- and Titanocene Alkyne Complexes

C. Fischer, W. Baumann, U. Rosenthal, 1997 .

On the enantioselective hydrogenation of isomeric methyl 3-acetamidobutenoates with RhI complexes.

A. Börner, J. You, W. Baumann, 2002, Chemistry.

The kinetics of a polytypic Laves phase transformation in TiCr2

A. Leineweber, W. Baumann, E. Mittemeijer, 2011 .

Trinuclear rhodium hydride complexes.

W. Baumann, C. Kohrt, H. Drexler, 2011, Dalton transactions.

Investigation into the Equilibrium of Iridium Catalysts for the Hydroformylation of Olefins by Combining In Situ High-Pressure FTIR and NMR Spectroscopy

K. Neymeyr, M. Sawall, A. Börner, 2014 .

Reactions of [Cp2Ti(η2-Me3SiC2SiMe3)] with 1,4-Bis(diphenylphosphanyl)but-2-yne: Coupling and Isomerization versus Phosphorylation†

W. Baumann, A. Spannenberg, F. Reiß, 2015 .

Thermal Isomerization of the Buchwald Seven-Membered Zirconacyclocumulene and Its Interaction with Acetylenes. Synthesis and Structures of Novel Seven-Membered Zirconacyclocumulene Complexes

K. Lyssenko, V. Shur, W. Baumann, 2015 .

Interaction of the five-membered zirconacyclocumulene complex Cp2Zr(η4-tBuC4tBu) with acetylenes. Synthesis of zirconacyclopentadienes and seven-membered zirconacyclocumulenes

K. Lyssenko, V. Shur, W. Baumann, 2014 .

Titanocene and zirconocene σ-alkynyl complexes in CC single bond coupling and cleavage reactions

W. Baumann, A. Spannenberg, V. Burlakov, 2003 .

Dynamic NMR study of a 1,3‐diyne bridged dinuclear bis(cyclopentadienyl)titanium complex: understanding the C—C single bond metathesis reaction †

W. Baumann, U. Rosenthal, P. Pellny, 2000 .

Nickel(0) Complexes of Five‐Membered Titana‐ and Zirconacyclocumulenes as Intermediates in the Cleavage of CC Bonds of Disubstituted Butadiynes

B. Heller, W. Baumann, R. Kempe, 1996 .

Reaction of Secondary Phosphine Oxides with Rhodium(I)

A. Börner, D. Selent, R. Franke, 2010 .

The First Metathesis of C–C Single Bonds in Homogeneous Solution: Titanocene‐Mediated and Photocatalyzed Cleavage and Recombination of Disubstituted Butadiynes

B. Heller, W. Baumann, U. Rosenthal, 1998 .

Solid solubility by anti-site atoms in the C36-TiCr2 Laves phase revealed by single-crystal X-ray diffractometry

A. Leineweber, W. Baumann, 2010 .

Formation of trinuclear rhodium-hydride complexes [{Rh(PP*)H}3-(μ2-H)3(μ3-H)][anion]2--during asymmetric hydrogenation?

W. Baumann, A. Spannenberg, C. Kohrt, 2013, Chemistry.

Protolysis of Seven-Membered Zirconacyclocumulene Complexes of Zirconocene

V. Shur, W. Baumann, A. Spannenberg, 2020, Organometallics.

Reactivity of a Seven‐Membered Zirconacyclocumulene towards CN Multiple Bonds – Formation of Metallaheterocycles by Insertion of C≡N and C=N Groups

W. Baumann, A. Spannenberg, V. S. Bogdanov, 2014 .

Synthesis of new diphosphine ligands and their application in Pd-catalyzed alkoxycarbonylation reactions.

R. Franke, M. Beller, R. Jackstell, 2014, Chemistry, an Asian journal.

Novel trans-.eta.2-Alkyne Complexes of Titanocene with Strong Si-H-Ti Interactions. Synthesis, Spectral Characteristics, and x-ray Crystal Structure

W. Baumann, R. Kempe, V. Burlakov, 1995 .

Determination of Gas Concentrations in Liquids by Nuclear Magnetic Resonance: Hydrogen in Organic Solvents

W. Baumann, Carmen Selle, D. Heller, 2012 .

A blue homoleptic bismuth-nitrogen cation.

A. Villinger, A. Schulz, W. Baumann, 2008, Angewandte Chemie.

Kinetic Investigations of the Hydrogenation of Diolefin Ligands in Catalyst Precursors for the Asymmetric Reduction of Prochiral Olefins, II[1]

W. Baumann, D. Heller, R. Selke, 1996 .

Charge Dispersal in Iminium-Substituted Alkynes: Synthesis, Spectral Characterization, and Crystal Structure Determination of a Co2(CO)6-Complexed Propyne Iminium Salt and Structural Comparison with Its Uncomplexed Counterpart

W. Baumann, D. Mayer, G. Maas, 1995 .

Formation of a 1-zircona-2,5-disilacyclopent-3-yne: coordination of 1,4-disilabutatriene to zirconocene?

H. Jiao, Martin Lamač, W. Baumann, 2010, Angewandte Chemie.

Synthesis and crystal structure of the first five-membered ansa-metallacyclocumulene rac-(ebthi)Zr(η4-t-Bu-C4-t-Bu)

Y. Nelyubina, K. Lyssenko, V. Shur, 2011 .

Synthesis and Isolation of Di-n-butylhafnocene and Its Application as a Versatile Starting Material for the Synthesis of New Hafnacycles

K. Lyssenko, V. Shur, W. Baumann, 2009 .

Reactions of Decamethylhafnocene with 1,3-Butadiynes: Formation of Hafnacyclocumulenes and C−H Activation at Pentamethylcyclopentadienyl Ligands

Stephan Peitz, W. Baumann, A. Spannenberg, 2007 .

Some Reactions of the Products of Reactions of 1,4-Bis(trimethylsilyl)-1,3-butadiyne with Titanoceneand Zirconocene

W. Baumann, A. Spannenberg, R. Kempe, 1997 .

Influence of solvents on the insertion of methacrolein into zirconacyclopropenes

W. Baumann, R. Kempe, V. Burlakov, 1996 .

Twofold CC Single Bond Activation and Cleavage in the Reaction of Octatetraynes with Titanocene and Zirconocene Complexes

W. Baumann, A. Spannenberg, R. Kempe, 1997 .

Intramolekulare Insertion eines η5-cyclopentadienyl-ringes in einem bis-η5-cyclopentadienyltitanacyclopentadien

P. Arndt, W. Baumann, R. Kempe, 1995 .

Reactions of Zirconocene Bis(trimethylsilyl)acetylene Complexes with Fluorinated Pyridines: C–H vs. C–F Bond Activation

W. Baumann, A. Spannenberg, V. Burlakov, 2005 .

Terminal Alkynes in the Coordination Sphere of Titanocene Complexes – Elementary Steps in Catalytic Dimerizations and Oligomerizations of Alkynes

M. Wagner, R. Beckhaus, W. Baumann, 1998 .

Exploring between the extremes: conversion-dependent kinetics of phosphite-modified hydroformylation catalysis.

K. Neymeyr, M. Sawall, A. Börner, 2012, Chemistry.

Evidence for the electron impact induced formation of prominent cyclic acetal ions from aliphatic ester lipids

R. Holman, J. Kramer, W. Baumann, 1973 .

Synthesis of cyclic glycerol acetal phosphates: proton and carbon-13 NMR characteristics of isomeric 1,3-dioxolane and 1,3-dioxane phosphate structures

C. Evans, W. Baumann, Y. Wedmid, 1980 .

Ring-Opening Reactions of Tetrahydrofuran versus Alkyne Complexation by Group 4 Metallocene Complexes Leading to General Consequences for Synthesis and Reactions of Metallocene Complexes

W. Baumann, T. Beweries, V. Burlakov, 2007 .

Carbon-13 nuclear magnetic resonance spectroscopy of phospholipids in solution. Spectral and stereochemical assignments based on carbon-13-phosphorus-31 and carbon-13-nitrogen-14 couplings

S. Parthasarathy, R. Murari, W. Baumann, 1982 .

QUADRUPOLAR CARBON-13-NITROGEN-14 COUPLINGS AND NITROGEN-14 RELAXATIONS IN AGGREGATED AND NONAGGREGATED CHOLINE PHOSPHOLIPIDS

R. Murari, W. Baumann, 1981 .

Stereoselective Synthesis of Highly Substituted Conjugated Dienes via Pd‐Catalyzed Carbonylation of 1,3‐Diynes

M. Beller, R. Jackstell, W. Baumann, 2019, Angewandte Chemie.

Calibration and desmearing of a differential thermal analysis measurement signal – upon heating and cooling –in the high-temperature region

A. Leineweber, W. Baumann, E. Mittemeijer, 2008 .

Influence of different correction models on investigations of carbonaceous insulating films by electron beam X-ray microanalysis

G. Marx, W. Baumann, K. Weise, 1995 .

Simple ruthenium-catalyzed reductive amination enables the synthesis of a broad range of primary amines

H. Neumann, M. Beller, T. Senthamarai, 2018, Nature Communications.

Gas injection and -zirkulationsvorrichtung for tracking of reactions in the liquid phase involving gaseous reactants under normal and high pressure by means of nuclear magnetic resonance spectroscopy (NMR spectroscopy pressure) under steady state conditions

A. Börner, D. Selent, W. Baumann, 2003 .

Gas bubbles in the NMR tube: an easy way to investigate reactions with gases in the liquid phase

W. Baumann, Susanne Borns, D. Heller, 1997 .

Determination of depth gradients of grain interaction and stress in Cu thin films.

U. Welzel, W. Baumann, M. Wohlschlögel, 2008 .

From a spin-off to the advantageous use in Diels-Alder reactions: a combined synthetic, spectroscopic and computational approach to N-(dienyl)acylamines.

H. Neumann, M. Beller, H. Jiao, 2004, Organic & biomolecular chemistry.

Carbonylation of the simplest persistent diaminocarbene.

D. Selent, U. Siemeling, C. Bruhn, 2013, Chemical communications.

Interplay between Catalyst Complexes and Dormant States: In Situ Spectroscopic Investigations on a Catalyst System for Alkene Hydroformylation

K. Neymeyr, M. Sawall, A. Börner, 2023, ACS Catalysis.

Kinetic Studies of the Oxidative Coupling of Methane Over a Ce/Li/Mgo Catalyst

W. Baumann, S. Bartsch, H. Hofmann, 1991 .

Reactions of Five-Membered Metallacyclocumulenes Cp2M(η4-t-Bu-C4-t-Bu) (M = Ti, Zr) with Diisobutylaluminum Hydride

V. Shur, W. Baumann, A. Spannenberg, 2011 .

Hydrogenation of Nitroarenes Using Defined Iron—Phosphine Catalysts.

M. Beller, R. Jackstell, K. Junge, 2014 .

Dehydropolymerisation of methylamine borane using highly active rhodium(iii) bis(thiophosphinite) pincer complexes: catalytic and mechanistic insights

C. Kubis, H. Jiao, W. Baumann, 2021 .

The Titanocene Complex of Bis(trimethylsilyl)acetylene: Synthesis, Structure, and Chemistry.

W. Baumann, A. Spannenberg, V. Burlakov, 2003 .

The influence of plastic deformation on polytypic phase transformations in TiCr2 Laves phases

A. Leineweber, W. Baumann, E. Mittemeijer, 2010 .

Chiral Oxo‐ and Oxy‐Functionalized Diphosphane Ligands Derived from Camphor for Rhodium(I)‐Catalyzed Enantioselective Hydrogenation

A. Börner, I. Komarov, C. Fischer, 2003 .

Chiral Oxo- and Oxy-Functionalized Diphosphane Ligands Derived from Camphor for Rhodium(I)-Catalyzed Enantioselective Hydrogenation.

I. Komarov, C. Fischer, W. Baumann, 2003 .

Long-chain stereomeric 2-alkyl-4-methoxycarbonyl-1,3-dioxolanes in glycerol acetal synthesis

W. Baumann, Y. Wedmid, 1977 .

Reactions of the Zirconocene Complexes of Bis(trimethylsilyl)acetylene with Formaldehyde, Benzaldehyde, and Benzophenone

W. Baumann, R. Kempe, V. Burlakov, 1996 .

Stronger Together! Mechanistic Investigation into Synergistic Effects during Homogeneous Carbon Dioxide Hydrogenation Using a Heterobimetallic Catalyst.

B. Kirchner, E. Hey‐Hawkins, P. Lönnecke, 2023, Inorganic chemistry.

Failure of Kissinger(-like) methods for determination of the activation energy of phase transformations in the vicinity of the equilibrium phase-transformation temperature

A. Leineweber, W. Baumann, E. Mittemeijer, 2010 .

Inside Cover: Stereoselective Synthesis of Highly Substituted Conjugated Dienes via Pd‐Catalyzed Carbonylation of 1,3‐Diynes (Angew. Chem. Int. Ed. 31/2019)

M. Beller, R. Jackstell, W. Baumann, 2019, Angewandte Chemie International Edition.

Low-Temperature Hydrogenation of Carbon Dioxide to Methanol with a Homogeneous Cobalt Catalyst.

M. Beller, R. Jackstell, W. Baumann, 2017, Angewandte Chemie.

Visiting the Limits between a Highly Strained 1-Zirconacyclobuta-2,3-diene and Chemically Robust Dizirconacyclooctatetraene.

H. Jiao, W. Baumann, A. Spannenberg, 2018, Chemistry.

Mild and selective hydrogenation of aromatic and aliphatic (di)nitriles with a well-defined iron pincer complex

M. Beller, H. Jiao, H. Junge, 2014, Nature Communications.

Synthesis and Reactions of Cp*2Hf(η2-PhC2SiMe3) with Water and Carbon Dioxide†

Stephan Peitz, W. Baumann, A. Spannenberg, 2008 .

Iridium(iii) hydrido complexes for the catalytic dehydrogenation of hydrazine borane.

H. Eckert, M. Hansen, H. Jiao, 2016, Dalton transactions.

Mechanochemical Oxidative Degradation of Thienopyridine Containing Drugs: Toward a Simple Tool for the Prediction of Drug Stability

U. Holzgrabe, C. Bolm, W. Baumann, 2023, ACS central science.

Carbonylation of the simplest persistent diaminocarbene.

D. Selent, U. Siemeling, C. Bruhn, 2013, Chemical communications.

A novel domino synthesis of quinazolinediones by palladium-catalyzed double carbonylation.

H. Neumann, M. Beller, Xiao‐Feng Wu, 2014, Chemistry.

Selective hydrogen production from methanol with a defined iron pincer catalyst under mild conditions.

M. Beller, M. Nielsen, P. Sponholz, 2013, Angewandte Chemie.

New pentacoordinated rhodium species as unexpected products during the in situ generation of dimeric diphosphine-rhodium neutral catalysts.

W. Baumann, H. Drexler, D. Heller, 2014, Chemistry.

Reactions of 1-Titana- and 1-Zirconacyclopent-3-ynes with Tris(pentafluorophenyl)borane

W. Bonrath, W. Baumann, T. Beweries, 2005 .

Unprecedented Formation of 2‐Chloro‐5‐(2‐chlorobenzyl)‐4,5,6,7‐tetrahydrothieno[3,2‐c]pyridine 5‐oxide via Oxidation‐Chlorination Reaction Using Oxone: A Combination of Synthesis and 1D‐2D NMR Studies

W. Baumann, Everaldo F. Krake, 2019 .