Cyclopentadienylvanadium tetracarbonyl

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Cyclopentadienylvanadium tetracarbonyl
CpV(CO)4.png
Identifiers
3D model (JSmol)
EC Number
  • 235-163-9
  • InChI=1S/C5H5.4CO.V/c1-2-4-5-3-1;4*1-2;/h1-5H;;;;;
    Key: LIFGJKDEFQAOFY-UHFFFAOYSA-N
  • [C-]#[O+].[C-]#[O+].[C-]#[O+].[C-]#[O+].C1=C[CH]C=C1.[V]
Properties
Appearance orange solid
Density 1.56 g/cm3
Boiling point sublimes
Hazards
GHS labelling:
GHS06: ToxicGHS07: Exclamation mark
Danger
H301, H311, H315, H319, H330, H335
P260, P261, P264, P270, P271, P280, P284, P301+P310, P302+P352, P304+P340, P305+P351+P338, P310, P312, P320, P321, P322, P330, P332+P313, P337+P313, P361, P362, P363, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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[edit]

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[edit]

  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. Inorg. Synth. Vol. 7. pp. 99–115. doi:10.1002/9780470132388.ch31. ISBN 9780470132388.
  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.