Cyclopentadienylvanadium tetracarbonyl is the organovanadium compound with the formula (C5H5)V(CO)4. An orange, diamagnetic solid, it is the principal cyclopentadienyl carbonyl of vanadium. It can be prepared by heating a solution of vanadocene under high pressure of carbon monoxide. As confirmed by X-ray crystallography, the coordination sphere of vanadium consists of η5-cyclopentadienyl and four carbonyl ligands. The molecule is a four-legged piano stool complex.[1] The compound is soluble in common organic solvents.[2] The compound has no commercial applications.
Reactions
Reduction with sodium amalgam gives the dianion of the tricarbonyl:
^Fischer, Ernst Otto; Schneider, Robert J. J. (1970). "Über Aromatenkomplexe von Metallen, CXIV. Darstellung und Reaktionen von Dicyclopentadienyl-divanadin-pentacarbonyl, (C 5 H 5 ) 2 V 2 (CO) 5". Chemische Berichte. 103 (11): 3684–3695. doi:10.1002/cber.19701031133.
^King, R. B.; Stone, F. G. A. (1959). "π-Cylopentadienyl-π-Cycloheptatrienyl Vanadium". Journal of the American Chemical Society. 81 (19): 5263–5264. doi:10.1021/ja01528a063.