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by | Mar 16, 2018 | Hosta

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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.

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Reduction with sodium amalgam gives the dianion of the tricarbonyl:

CpV(CO)4 + 2 Na → Na2CpV(CO)3 + CO

Protonation of this salt gives Cp2V2(CO)5.[3]

Heating a mixture of cycloheptatriene and cyclopentadienylvanadium tetracarbonyl gives (cycloheptatrienyl)(cyclopentadienyl)vanadium ("trovacene").[4]

References

  1. ^ Wilford, J.B.; Whitla, A.; Powell, H.M. (1967). "The Crystal and Molecular Structure of π-Cyclopentadienylvanadium Tetracarbonyl". Journal of Organometallic Chemistry. 8 (3): 495–502. doi:10.1016/S0022-328X(00)83671-2.
  2. ^ King, R.B.; Stone, F.G.A (1963). Cyclopentadienyl Metal Carbonyls and Some Derivatives. Vol. 7. pp. 99–115. doi:10.1002/9780470132388.ch31. ISBN 9780470132388. {{cite book}}: |journal= ignored (help)
  3. ^ 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.
  4. ^ 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.
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