Concept

Organovanadium chemistry

Summary
Organovanadium chemistry is the chemistry of organometallic compounds containing a carbon (C) to vanadium (V) chemical bond. Organovanadium compounds find only minor use as reagents in organic synthesis but are significant for polymer chemistry as catalysts. Oxidation states for vanadium are +2, +3, +4 and +5. Low valency vanadium is usually stabilized with carbonyl ligands. Oxo derivatives are relatively common, unlike the organic complexes of neighboring elements. Compound classes Carbonyls Vanadium carbonyl can be prepared by reductive carbonylation of vanadium salts: :4 Na + VCl3 + 6 CO → Na[V(CO)6] + 3 NaCl The salt can be oxidized to the 17e binary carbonyl V(CO)6. Cyclopentadienyl derivatives Vanadocene dichloride, the first organovanadium complexes to be reported, is prepared from sodium cyclopentadienyl and vanadium tetrachloride: :2 NaC5H5 + VCl4 → VCp2Cl2 + 2NaCl Reduction of this compound gives the parent vanadocene (Cp2V): :VCp2Cl2 + LiAlH4
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