Trialkyl orthovanadates

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

“…A wide range of model systems have been investigated to examine if trialkoxo oxovanadium(V) complexes ( 10 ) indeed are structurally similar to triphosphate esters. A large number of vanadium trisalkoxides have been reported, − with the simplest systems first reported in 1913 . In general, the studies focusing on structural characterization have shown that for a wide range of alkoxide ligands, the V(V) center becomes five-coordinate ( 11 ) by dimerization even in the absence of other coordinating ligands. − Dimerization is observed in solutions with 10 mM or more of the oxovanadium trisalkoxides and association is observed between molecules. ,, As the concentration decreases, the fraction of presumed four-coordinate vanadium trisalkoxides increases.…”

“…A wide range of model systems have been investigated to examine if trialkoxo oxovanadium(V) complexes (10) indeed are structurally similar to triphosphate esters. A large number of vanadium trisalkoxides have been reported, [82][83][84][85] with the simplest systems first reported in 1913. 82 In general, the studies focusing on structural characterization have shown that for a wide range of alkoxide ligands, the V(V) center becomes five-coordinate (11) by dimerization even in the absence of other coordinating ligands.…”

Thermodynamic Studies on Complexation of Glutamic Acid with Dioxovanadium(V) in Mixed Solvent Systems

“…Vanadium(IV) and (V) are thought to be bound to the serum protein, transferrin, via an amino acid as a ligand. Oxovanadium(V) alkoxides of simple alcohols including methanol, ethanol, 2-propanol, and cyclohexanol are well-known; − also, more complex derivatives have recently been described for diol derivatives . But few quantitative studies of the interaction between dioxovanadium(V) and alcohols in mixed solvent systems have been reported …”