S. Hammerum

发表

Mass spectrometry in structural and stereochemical problems CCXLV. The electron impact induced fragmentation reactions of 17-oxygenated progesterones

C. Djerassi, S. Hammerum, 1975, Steroids.

Mass spectrometry in structural and stereochemical problems—CCXLIV : The influence of substituents and stereochemistry on the mass spectral fragmentation of progesterone

C. Djerassi, S. Hammerum, 1975 .

The α-effect in gas-phase SN2 reactions of microsolvated anions: methanol as a solvent.

S. Hammerum, Charles M Nichols, V. Bierbaum, 2014, The journal of physical chemistry. A.

The α-Effect and Competing Mechanisms: The Gas-Phase Reactions of Microsolvated Anions with Methyl Formate

S. Hammerum, Charles M Nichols, V. Bierbaum, 2014, Journal of The American Society for Mass Spectrometry.

Investigating the α-effect in gas-phase S(N)2 reactions of microsolvated anions.

S. Hammerum, Charles M Nichols, V. Bierbaum, 2013, Journal of the American Chemical Society.

Redshift or Adduct Stabilization—A Computational Study of Hydrogen Bonding in Adducts of Protonated Carboxylic Acids

S. Hammerum, S. G. Olesen, 2009, European journal of mass spectrometry.

Alkyl radicals as hydrogen bond acceptors: computational evidence.

S. Hammerum, 2009, Journal of the American Chemical Society.

Distonic radical cations in gaseous and condensed phase

S. Hammerum, 1988 .

Heats of formation of imine and enamine radical cations and the corresponding neutral molecules

S. Hammerum, J. Henriksen, 1998 .

Heats of formation of gas-phase ions calculated by composite ab initio procedures

S. Hammerum, 1997 .

Bimolecular reactions of distonic ions: Proton transfer and hydrogen atom abstraction with ˙CH2OH2+

S. Hammerum, P. Mourgues, H. Audier, 1993 .

Possible Intermediacy of Cyclopropane Complexes in the Isomerization of Aliphatic Amine Radical Cations.

S. Hammerum, Christian B. Nielsen, Anders H. Pedersen, 2019, The journal of physical chemistry. A.

THE CHEMISTRY OF HEXAHYDRO-1,2,4,5-TETRAZINES PART 4, THE REACTIONS OF ALKYLHYDRAZINES WITH FORMALDEHYDE

K. Leander, C. Swahn, S. Hammerum, 1973 .

The 1,2 migration of NH3 in protonated β-aminoalkyl radicals

S. Hammerum, 2000 .

The proton affinities of saturated and unsaturated heterocyclic molecules

S. Hammerum, E. Beelen, S. Ingemann, 2006 .

The Unimolecular Reactions of Ionized Methylacetamides

S. Hammerum, L. Jensen, 2004 .

The Formation and Heats of Formation of Simple α-Distonic Ions

S. Hammerum, L. Jensen, 2004 .

Identification of oxygenated ions in premixed flames of dimethyl ether and oxygen

S. Hammerum, H. Egsgaard, L. Østergaard, 2003 .

Protonation of fluorophenols and fluoroanisoles in the gas phase: experiment and theory

S. Hammerum, B. Bogdanov, S. Ingemann, 2002 .

The rearrangement and simple cleavage of metastable octanamine radical cations

S. Hammerum, Tina Henriksen, 2000 .

Methyl loss from conventional and distonic isomers of C3H7N

S. Hammerum, J. Henriksen, T. Sølling, 2000 .

Alkane loss from the molecular ions of alcohols, ketones, and amines in the μsec timeframe

S. Hammerum, P. Derrick, K. F. Donchi, 1983 .

Rearrangement and hydrogen abstraction reactions of amine cation radicals: a gas-phase analogy to the Hofmann-Löffler-Freytag reaction

S. Hammerum, 1981 .

Mass spectrometry in structural and stereochemical problems‐CCXXIX: Electron‐impact‐induced fragmentation of boric acid esters

C. Djerassi, S. Hammerum, 1974 .

Reduction of 2-chloro-N-phenylpropanamide and 2-methyl-N-phenylaziridine with lithium aluminium hydride.

S. Hammerum, M. Nielsen, Mie Højer Vilhelmsen, 2008, Organic & biomolecular chemistry.

The chemistry of hexahydro-1,2,4,5-tetrazines - III. formation and dimerization of formaldehyde alkylhydrazones

S. Hammerum, 1972 .

The chemistry of hexahydro‐1,2,4,5‐tetrazines—II: Mass spectra of 1,4‐dialkylhexahydro‐1,2,4,5‐tetrazines and 1,4‐dialkyl‐2,5‐diacylhexahydro‐1,2,4,5‐tetrazines

J. Møller, S. Hammerum, 1971 .

Isomerization and fragmentation of aliphatic ether radical cations: Interconversion of distonic ions and cyclopropane intermediates

S. Hammerum, A. Milliet, H. Audier, 1990 .

Distonic Ions as Reacting Species

S. Hammerum, D. Kuck, T. Bjørnholm, 1988 .

Intramolecular hydrogen atom abstraction with an eight-membered cyclic transition state in open-chain aliphatic aminium radicals

S. Hammerum, T. Vulpius, J. Denhez, 1985 .

Site-specific hydrogen abstraction in the electrochemical oxidation of ketones

S. Hammerum, O. Hammerich, 1980 .

The methylene chloride radical cation and its distonic isomers in the gas phase 1 1 Dedicated to pro

S. Hammerum, A. C. Petersen, 2001 .

The expulsion of alkyl radicals from the methyliumylaminomethyl radicalcation, ˙CH2NH2CH3+,and related distonic ions

S. Hammerum, T. Sølling, T. Vulpius, 1997 .

Deprotonation of α-distonic ions. Proton affinities of the α-radicals

S. Hammerum, P. Mourgues, J. Fossey, 1996 .

α-Distonic ions as transient species in the reactions of metastable alkyl benzoate radical cations

S. Hammerum, A. Milliet, H. Audier, 1990 .

Mass spectrometry in structural and stereochemical problems. CCXXXIII. Stereochemical dependence of the retro-Diels-Alder reaction

C. Djerassi, S. Hammerum, 1973 .

MASS SPECTROMETRY IN STRUCTURAL AND STEREOCHEMICAL PROBLEMS PART 233, ON THE STEREOCHEMICAL DEPENDENCE OF THE RETRO-DIELS-ALDER REACTIONS

C. Djerassi, S. Hammerum, 1973 .

Energy‐dependent reversal of secondary isotope effects on simple cleavage reactions: Tertiary amine radical cations with deuterium at remote positions

S. Hammerum, P. Derrick, R. Fokkens, 1989 .

Vibrational predissociation spectra of the Ar-tagged [CH4 · H3O+] binary complex: spectroscopic signature of hydrogen bonding to an alkane

S. Hammerum, G. Weddle, S. G. Olesen, 2010 .

Experimental and Theoretical Evaluation of Proton Affinities of Furan, the Methylphenols, and the Related Anisoles

S. Hammerum, E. Beelen, S. Ingemann, 2004 .

Acyclic, achiral enamide nucleoside analogues. The importance of the C=C bond in the analogue for its ability to mimic natural nucleosides.

S. Hammerum, M. Petersen, U. Henriksen, 2003, Organic & biomolecular chemistry.

On the nature of the transition state leading to elimination of ketene from acetanilide

K. Tomer, S. Hammerum, 1972 .

The mass spectrometry of 1,3,4-thiadiazolines

S. Hammerum, Peder Wolkoff, 1974 .

On the release of translational energy when stable intermediate ion-neutral complexes dissociate

S. Hammerum, H. Audier, Malene Mohr Hansen, 1997 .

Experimental verification of the intermediacy and interconversion of ion–neutral complexes as radical cations dissociate

S. Hammerum, H. Audier, 1988 .

The reactions of enol radical cations with propene in the gas phase

S. Hammerum, P. Mourgues, H. Audier, 1990 .

Addition of alkenes to phenyl‐substituted enol radical cations, C6H5C(OH)CHR+˙

S. Hammerum, P. Mourgues, J. Denhez, 1993 .

Isomers and Isomerization of Molecular Ions: the Formation of Stable Ion-Neutral Complexes During Unimolecular Dissociation

S. Hammerum, 1991 .

Secondary hydrogen isotope effects on simple cleavage reactions in the gas phase: the. cap alpha. -cleavage of tertiary amine cation radicals

S. Hammerum, P. Derrick, S. Ingemann, 1988 .

Isomerization of Metastable Amine Radical Cations by Dissociation—Recombination

S. Hammerum, G. Bojesen, Anders H. Pedersen, 2015, European Journal of Mass Spectrometry.

Intramolecular hydrogen bonding and hydrogen atom abstraction in gas-phase aliphatic amine radical cations.

S. Hammerum, C. Nielsen, 2005, The journal of physical chemistry. A.

Slow alkyl, alkene, and alkenyl loss from primary alkylamines: Isomerization of the low-energy molecular ions prior to fragmentation in the μsec timeframe

S. Hammerum, P. Derrick, J. B. Christensen, 1983 .

A regiospecific cycloaddition: Successive reactions of ·CH2CH2OH +2 with CH2O

S. Hammerum, P. Mourgues, H. Audier, 1994 .

Secondary kinetic deuterium isotope effects. The CC cleavage of labeled tetramethylethylenediamine radical cations—Who gets to keep the electron?

S. Hammerum, C. Nielsen, 2017 .

Secondary kinetic deuterium isotope effects on unimolecular cleavage reactions: Zero-point vibrational energy and qualitative RRKM theory.

S. Hammerum, L. Østergaard, 2021, Mass spectrometry reviews (Print).

Distinction between C3H+6 isomers: reactions of cyclopropane and propene radical cations with water and methanol at low pressure

S. Hammerum, P. Mourgues, H. Audier, 1992 .

Isomers of Amine Molecular Ions; The Structures of C2H7N+. and related radical cations

S. Hammerum, D. Kuck, P. Derrick, 1984 .

Formation and stabilization of intermediate ion–neutral complexes in radical cation dissociation reactions

S. Hammerum, 1988 .

Catalysed isomerization of simple radical cations in the gas phase

S. Hammerum, P. Mourgues, T. Mcmahon, 1994 .

On why some low-energy decomposition pathways of simple ketone molecular ions do not give rise to metastable peaks. A reappraisal

S. Hammerum, P. Derrick, 1986 .

ON THE STRUCTURAL INTEGRITY OF NASCENT ALKYL RADICALS

S. Hammerum, 1985 .

Time‐dependence of the isotope effects in the unimolecular dissociation of tertiary amine molecular ions

S. Hammerum, P. Derrick, N. Nibbering, 1991 .

Secondary Hydrogen Isotope Effects on Simple Cleavage Reactions in the Gas Phase: The α-Cleavage of Tertiary Amine Cation Radicals

S. Hammerum, P. Derrick, S. Ingemann, 1988 .

The influence of fragment size and intermediate barriers on competing near-identical simple cleavage reactions: A variational RRKM study

S. Hammerum, T. Sølling, T. Vulpius, 2011 .

Competing simple cleavage reactions: the elimination of alkyl radicals from amine radical cations.

S. Hammerum, K. Norrman, T. Sølling, 2005, Journal of the American Chemical Society.

Heats of formation and proton affinities by the G3 method

S. Hammerum, Steen Hammerum, 1999 .

ISOMERIZATION AND FRAGMENTATION OF METASTABLE SECONDARY AMINE RADICAL CATIONS

S. Hammerum, T. Rojo, P. Meenan, 1998 .

The behavior of C6H14+· ions

S. Hammerum, Peder Wolkoff, J. Holmes, 1983 .

Formation of Proton-Bound Dimers as the Driving Force for Alkyl Radical Loss in the Gas Phase Reactions of Radical Cations

S. Hammerum, P. Mourgues, T. Mcmahon, 1996 .

Alpha-cleavage in amine molecular ions. A not-so-simple simple cleavage

S. Hammerum, P. Derrick, 1985 .

MASS SPECTRA OF NITRO-SUBSTITUTED AROMATIC NITRAMINES, A NOVEL ORTHO-EFFECT

G. Schroll, S. Hammerum, O. Buchardt, 1975 .

Hydrogen bonding to alkanes: computational evidence.

S. Hammerum, S. G. Olesen, 2009, The journal of physical chemistry. A.

Electron impact induced fragmentations mimicking retro-1,3-dipolar cycloadditions

S. Hammerum, Peder Wolkoff, 1972 .

The mass spectra of some simple phenylhydrazides and a re-examination of the fragmentations of phenylhydrazine

S. Hammerum, Peder Wolkoff, 1976 .

Isotope effects on the unimolecular dissociation of ionized 3-methyl-2-butanol: reactions via a long-lived C-H-C hydrogen-bridged ion-neutral complex.

S. Hammerum, L. Jensen, M. Mohr, 2005, The journal of physical chemistry. A.

Bimodal internal energy distribution as a consequence of Cul‐de‐sac isomerization reactions

S. Hammerum, T. Vulpius, H. Audier, 1992 .

The structure of the high energy (m-ketene)+. ions from acetanilide.

C. Djerassi, K. Tomer, S. Hammerum, 1973 .

Secondary kinetic deuterium isotope effects. The CC cleavage of labeled tetramethylethylenediamine radical cations—Who gets to keep the electron?

S. Hammerum, C. Nielsen, 2017 .