New binuclear iron-vanadium complexes of arylazo oximates. Crystal structure of [Fe(PhN=NCPh=NO)3VO(bipy)]PF6 (bipy = 2,2'-bipyridine)

Binuclear iron(II)–vanadium(IV) complexes of types [FeL3VO(acac)]1 and [FeL3VO(diam)]PF62 have been prepared where HL is PhNNC(R)NOH with R = Ph(HL1) or Me(HL2), Hacac is acetylacetone and diam is 2,2′-bipyridine (bipy), 1,10-phenanthroline or 3,5-dimethyl-1-(2-pyridyl)pyrazole. Complexes of type 1 are obtained from Na[FeL3]·H2O and [VO(acac)2] and 2 by adding diam to acidified 1. The crystal structure of [FeL13VO(bipy)] PF6 has been determined. The low-spin iron(II) atom is facially tris chelated in the Fe(N,N)3 fashion and the three pendant oximato oxygen atoms engage the vanadium atom which is also bonded to an oxo oxygen and bipy nitrogen atoms. The VO4N2 co-ordination sphere is distorted octahedral. The trans influence of the oxo oxygen lengthens a V–O(oximate) bond by 0.2 A. The complexes behave as one-electron paramagnets due to the VO2+ centre. Their ESR spectra are axial with g∥ 2.

[1]  R. Felty,et al.  Cyclic vanadium(V) alkoxide. An analog of the ribonuclease inhibitors , 1991 .

[2]  A. Butler,et al.  Chlorination catalyzed by vanadium bromoperoxidase , 1990 .

[3]  Hanqin Liu,et al.  Syntheses, structures, and properties of vanadium, cobalt, and nickel compounds with 2-mercaptophenol , 1990 .

[4]  A. Butler,et al.  Characterization of vanadium bromoperoxidase from Macrocystis and Fucus: reactivity of vanadium bromoperoxidase toward acyl and alkyl peroxides and bromination of amines. , 1990, Biochemistry.

[5]  K. Raymond,et al.  Synthesis and characterization of a series of vanadium-tunichrome B 1 analogs. Crystal structure of a tris(catecholamide) complex of vanadium , 1990 .

[6]  M. R. Snow,et al.  An oxo-bridged binuclear vanadium(III) 2,2'-bipyridine complex and its vanadium(IV) and vanadium(V) oxidation products , 1990 .

[7]  S. Pal,et al.  Chemistry of ferroverdin: trinuclear species of type [M(FeL3)2](M = Mg, Ca, Mn, Fe, Co, Ni, Zn, or Cd; L = 4-methyl-1,2-benzoquinone 2-oximate) , 1990 .

[8]  K. Wieghardt,et al.  Syntheses and characterization of stable pseudo-octahedral tris-phenolato complexes of vanadium-(III), -(IV), and -(V) , 1990 .

[9]  G. Fallon,et al.  A macrocyclic binuclear vanadium(III) complex with di-µ-alkoxo bridging and pentagonal-bipyramidal metal co-ordination. X-Ray crystal structure of [V2L(H2O)4][ClO4]4·2H2O (H2L = 1,7,14,20-tetramethyl-2,6,15,19-tetra-aza[7,7](2,6)-pyridinophane-4,7-diol) , 1990 .

[10]  A. Terzis,et al.  Vanadyl(IV)–amide binding. The preparation and X-ray crystal structure of [VO(pycac)]{H2pycac =N-[2-(4-oxopentan-2-ylideneamino)phenyl]pyridine-2-carboxamide} , 1990 .

[11]  S. Pal,et al.  Synthesis and structure of a trinuclear manganese(II) complex containing low-spin metal , 1990 .

[12]  C. Carrano,et al.  Monomeric and dimeric vanadium(IV) and -(V) complexes of N-(hydroxyalkyl)salicylideneamines: structures, magnetochemistry and reactivity , 1990 .

[13]  K. Kustin,et al.  Vanadium : a biologically relevant element , 1990 .

[14]  D. Crans,et al.  Vanadate tetramer as the inhibiting species in enzyme reactions in vitro and in vivo , 1990 .

[15]  D. Crans,et al.  Interaction of trace levels of vanadium(IV) and vanadium(V) in biological systems , 1989 .

[16]  A. D. Kirk,et al.  Relative labilities of 1,3-diaminopropane and ammonia ligands in photoaquation of chromium [Cr(tn)x(NH3)6-2x]3+ complexes , 1988 .

[17]  K. Nakanishi,et al.  The tunichromes. A class of reducing blood pigments from sea squirts: isolation, structures, and vanadium chemistry. , 1988, Journal of the American Chemical Society.

[18]  G. George,et al.  X-ray absorption of Azotobacter vinelandii vanadium nitrogenase , 1988 .

[19]  S. Pal,et al.  First example of a mixed-spin trinuclear manganese(II) complex: [MnN6(S = 1/2)][MnO6(S = 5/2)][MnN6(S = 1/2)] , 1988 .

[20]  J. Livage,et al.  Electron paramagnetic resonance studies of vanadium tetrachloride adducts with oxygen, nitrogen, phosphorus, and arsenic donor ligands , 1988 .

[21]  K. Boon,et al.  Electron paramagnetic resonance studies on conformational states and metal ion exchange properties of vanadium bromoperoxidase , 1988 .

[22]  K. Hodgson,et al.  Further investigation of the status of acidity and vanadium in the blood cells of Ascidia ceratodes , 1988 .

[23]  S. Pal,et al.  Ionophoric binding of alkaline-earth-metal cations (A2+) by tris(arylazo oximato)iron(II) anions (RL−): the trinuclear A(RL)2 family , 1987 .

[24]  R. Mukherjee,et al.  Osmium azo oxime chemistry. Facial tris chelate and trinuclear OsMOs species , 1987 .

[25]  R. H. Holm,et al.  Heterometallic clusters: synthesis and reactions of vanadium-iron-sulfur single- and double-cubane clusters and the structure of [V2Fe6S8Cl4(C2H4S2)2]4- , 1987 .

[26]  R. H. Holm,et al.  Structural chemistry of vanadium-iron-sulfur clusters containing the cubane-type [VFe3S4]2+ core , 1987 .

[27]  C. Carrano,et al.  Vanadium phenolates as models for vanadium in biological systems. 1. Synthesis, spectroscopy, and electrochemistry of vanadium complexes of ethylenebis[(o-hydroxyphenyl)glycine] and its derivatives , 1986 .

[28]  H. Kneifel,et al.  Stereochemistry and total synthesis of amavadin, the naturally occurring vanadium compound of Amanita muscaria , 1986 .

[29]  R. H. Holm,et al.  Assembly of vanadium-iron-sulfur cubane clusters from mononuclear and linear trinuclear reactants , 1986 .

[30]  R. Mukherjee,et al.  Trinucleation of arylazo oxime ensembles. 2. Linear iron(II)-nickel(II)-iron(II) and related systems , 1986 .

[31]  Scott R. Wilson,et al.  (CH3C5H4)2V2S4 as an Organometallic Ligand: Preparation of Iron, Cobalt, Nickel, and Iridium Derivatives and Structures of a V4Ni Cluster and Three V2Fe Clusters , 1986 .

[32]  Y. Do,et al.  Tetrathiovanadate(V) and tetrathiorhenate(VII): structures and reactions, including characterization of the VFe2S4 core unit , 1985 .

[33]  R. Mukherjee,et al.  Trinucleation of arylazo oxime ensembles: structure and reactions of novel linear FeIIFeIIIFeII species , 1985 .

[34]  C. Carrano,et al.  Binding of vanadate to human serum transferrin. , 1984, Journal of inorganic biochemistry.

[35]  Scott R. Wilson,et al.  Stepwise assembly of heterometallic M4S4 clusters. The structure of bis[(methylcyclopentadienyl)vanadium] bis(nitrosyliron) sulfide [(MeCp)2V2Fe2(NO)2S4], a 58e cubane , 1984 .

[36]  H. Vilter.  Peroxidases from phaeophyceae: A vanadium(V)-dependent peroxidase from Ascophyllum nodosum , 1984 .

[37]  Y. Do,et al.  Derivatives of tetrathiovanadate(V): synthesis of the linear heterometallic Fe(.mu.2-S)2V(.mu.2-S)2Fe core and the structures of tetrathiovanadate(3-) ion ([VS4]3-) and tetrachlorotetrathiodiferratevanadate(3-) ion ([VFe2S4Cl4]3-) , 1983 .

[38]  D. Lerner,et al.  New ruthenium(II) complexes with pyridylpyrazole ligands. Photosubstitution and /sup 1/H, /sup 13/C, and /sup 99/Ru NMR structural studies , 1983 .

[39]  T. R. Gilbert,et al.  Vanadium and other metal ions in the physiological ecology of marine organisms , 1983 .

[40]  Scott R. Wilson,et al.  Synthesis of organovanadium sulfide cluster compounds via bis(methylcyclopentadienyl)divanadium tetrasulfide , 1983 .

[41]  A. Rudie,et al.  COMPARATIVE STUDY OF 1,1′‐BIS(DIPHENYLPHOSPHINO)COBALTOCINIUM HEXAFLUOROPHOSPHATE AND 1,1′‐BIS(DIPHENYLPHOSPHINO)FERROCENE AS BIDENTATE LIGANDS , 2002 .

[42]  A. Chakravorty,et al.  Azooximeiron systems, part I. Simultaneous binding of iron(II) and sodium(I) , 1979 .

[43]  A. Chakravorty,et al.  Hydrogen bonding and isomerism in arylazo oximes , 1970 .