Polyoxovanadates with Organic Ligands
作者： Dieter Rehder
DOI: 10.1007/978-94-011-0920-8_11
关键词: Pivalic acid 、 HEXA 、 Hydroxide 、 Vanadium 、 Carboxylate 、 Vanadate 、 Nuclear magnetic resonance spectroscopy 、 Chemistry 、 Stereochemistry 、 Denticity 、 Polymer chemistry
摘要: Polyoxovanadates are inhibitors to various phosphate-metabolizing enzymes. The question arises of how the cluster is bound protein matrix. This paper describes oxovanadates with carboxylate and hydroxide ligands in periphery cluster, which may be considered model oxovanadate binding carboxylic alcoholic side-chain functions protein. Examples for complexes carrying alkoxo dealt this article dinuclear vanadate(V) esters, hexa-, octa-and decanuclear, mixed-valence (VV/VIV) clusters, latter related decavanadate. possible role dimeric vanadate esters as transition state anologues enzymatic phosphoester cleavage addressed. mononuclear, seven-coordinate mixed anhydride between orthovanadic acid pivalic acid, containing bidentate mode, tetra-, penta-and hexanuclear VIV/VV clusters bridging carboxylate, trinuclear VIV VII/VIII bridged by carboxylates trebly O2-. Special attention given a comparison bowls V4(µ-O)3(µ-OH)(O2CR)4 V4(µ-O4(O2CR)4 core, respecitvely, can accomodate K+ or NO3 -. 51V NMR spectroscopy shown useful tool, many cases, vanadium speciation complex systems.
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