Vanadium selenates

Boisson, F., M. Gnassia-Barelli, and M. Romeo. 1995. Toxicity and accumulation of selenite and selenate in the unicellular marine algae Cricosphaera elongata. Arch. Environ. Contamin. Toxicol. 28 497-493. Bovee, E.C. and T.L. O Brien. 1982. Some effects of selenium, vanadium and zirconium on the swimming rate of Tetrahymena pyriformis a bioassay study. Univ. Kans. Sci. Bull. 52 (4) 39 44. 

By the action of vanadium pentoxide on selenous acid solutions, or by reduction of a solution of vanadium pentoxide in selenic acid, red crystals of a free vanado-selenous acid have been obtained, the composition of which is SV206.4Se02.4H20.j aq. It contains four molecules of water of constitution, and, according to Prandtl, should be formulated H4Ve017.4H2Se03.(aj—2) aq. 

Vanadyl Selenite, V02.Se02.2H20, is obtained in blue, microscopic crystals when the hydrate of hypovanadic oxide, V02.2Ha0, is dissolved in an aqueous solution of selenous acid and the solution evaporated.3 Efforts to prepare normal selenates and selenate alums of trivalent vanadium were unsuccessful, but several hydrated aceto-selenates of trivalent vanadium have been isolated.4... 

Vanadium pentoxide and selenous add condense together to form a large number of complex vanadoselenites which are described on p. 89. 

Bis(cyclopentadienyl)bis(pentafluorophenyl)zirconium, 3824 Bis(cyclopentadienyldinitrosylchromium), 3269 Bis(cyclopentadienyl)hexafluoro-2-butynechromium, 3629 Bis(cyclopentadienyl)lead, 3288 Bis(cyclopentadienyl)magnesium, 3271 Bis(cyclopentadienyl)manganese, 3272 Bis(cyclopentadienyl)niobium tetrahydroborate, 3318 Bis(cyclopentadienyl)pentafluorophenylzirconium hydroxide, 3696 Bis(cyclopentadienyl)phenylvanadium, 3698 Bis(cyclopentadienyl)titanium selenate, 3287 Bis(cyclopentadienyl)tungsten diazide oxide, 3279 Bis(cyclopentadienyl)vanadium diazide, 3280 Bis(cyclopentadienyl)zirconium, 3290 Bis(l,2-diaminoethane)diaquacobalt(III) perchlorate, 1787 Bis(l,2-diaminoethane)dichlorocobalt(III) chlorate, 1780 Bis(l,2-diaminoethane)dichlorocobalt(III) perchlorate, 1781 c/i-Bisf 1,2-diaminoethane)dinitrocobalt(III) iodate, 1782 Bis(l,2-diaminoethane)dinitrocobalt(III) perchlorate, 1778 Bis(l,2-diaminoethane)hydroxooxorhenium(V) perchlorate, 1785 Bis(l, 2-diaminopropane)-ds-dichlorochromium(III) perchlorate, 2609 1,10-Bis(diazonio)decaboran(8)ate, 0197... 

DUrre P, Andreesen JR (1989) Die biologische Bedeutung von Selen. Biologie unsererZeit 16 12-19 Eady RR (2003) Current status of structure function relationships of vanadium nitrogenases. Coord Chem Rev 237 23-30 Egami F (1974) Minor elements and evolution. J Mol Evol 4 113-120... 

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