Abstract
Polyvanadates are of interest in conjunction with new materials and catalysis, sensor technology, and enzymology. We report here the preparation, X-ray structure and other properties of the new compound, heptamethoxyhexavanadate, [V 6O 12(OCH 3) 7] − (1). Crystalline (n-Bu 4N)[V 6O 12(OCH 3) 7] ( a=10.184(4), b=12.742(4), c=17.148(5) Å, α=72.62(3), β=73.42(3), γ=70.92(3)°, Z=2, space group= P 1 ) contains a total of seven μ 2-(OCH 3) groups with one of the OCH 3 groups having two-fold disorder in the solid state. NMR on three nuclei ( 1H, 13C and 51V) confirm that 1 retains the solid state structure in anhydrous acetonitrile solution at 25 °C. 1 has a quite positive potential: E f= E pc+ E pa/2=−0.344 V versus Fc +/Fc ( E pc− E pa=78 mV; n=1 electron).
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