Structure of dipotassium aquadioxotetraperoxodivanadate(V) trihydrate

Abstract

Abstract. K2[V202(O2) The coordination polyhedron of each V atom can be described as a pentagonal pyramid. Within the dimeric peroxo complex the coordination polyhedra are chemically nonequivalent and are connected to each other by sharing one O atom of the peroxo group. In the structure there is a hydrogen-bond network including 0 atoms of complexes and water molecules.

Copper-Dioxygen Complexes. Inorganic and Bioinorganic Perspectives

“…The Cu-Cu separation of [Cu[HB(3,5-iPr2pz)3]]2(02) is 3.56 A, which is considerably shorter than that found in the trcms-M-l,2-peroxo dinuclear copper- (II) complex {[Cu(TMPA)]2(02)}2+ (4.36 A).29 Two examples of planar n-^rf-peioxo complexes of La34 and U35 are known and very recently a bent ;2 coordination mode of the peroxide was found in a V complex. 36 The driving force for the unusual coordination modes in these complexes is reasonably attributable to the high oxophilicity of these elements. However, this interpretation cannot be applied to [Cu-[HB(3,5-iPr2pz)3]]2(02), since cupric ion is not particularly oxophilic.…”

Non-Heme Peroxidases and Catalases: Mechanistic Implications from the Studies of Manganese and Vanadium Model Compounds

“…5.10a). 69,70 Based on this data, the V 2 0 2 (0 2 )3 dimer is proposed to have an asymmetrically bridging peroxide of the form shown in Fig. 5.10b.…”

The Chemistry and Biochemistry of Vanadium and the Biological Activities Exerted by Vanadium Compounds

“…These complexes are of interest not only because they are intermediates in the catalytic cycle of the VHPO reaction, but because of their use as catalysts in organic synthesis. , In addition, administration of these complexes to cell cultures are found to increase the protein phosphorylation of the insulin receptor (IR) presumably by inhibiting a protein phosphatase (vide infra). − Aqueous V(V) in the presence of H 2 O 2 at acidic pH was found to functionally mimic VBPO , and a protein−peroxovanadium(V) complex has now been structurally characterized demonstrating the details in the active site when the vanadium ion is coordinated to a peroxo group . A wide range of peroxovanadium complexes have been reported, and several reviews are dedicated to the discussion of the structure and chemistry of these systems. ,, In Table we summarize the known peroxovanadium complexes with O and N donor atoms and their structures ( 33 − 46 ). ,− A summary of all known peroxovanadium(V) systems including those with ligand donors others than O and N have been reported elsewhere . In addition to the spect...…”