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• W2034983888 abstract "Abstract The crystal structure of trimethylenemethanechromium tricarbonyltriphenylphosphine has been determined by conventional Patterson and Fourier methods. The structural results of a full matrix least squares refinement (R1 = 0.083, R2 = 0.089) and those of a block-diagonal least squares refinement (R1 = 0.088, R2 = 0.087) are not significantly different by Cruickshank's test. The compound crystallizes in the monoclinic space group C2/c with 16 molecules in a unit cell of dimensions a = 36.955(3), b = 10.789(1), c = 22799(3) », β = 100.80(1)°. The experimental and calculated densities are 1.36 g/cm3 and 1.35 g/cm3, respectively. Carboncarbon bond distances within the trimethylenemethane ligand, as well as metalligand π-bonding distances, are equivalent with a mean value of 1.42(1) » for the former and 2.23(1) » for the latter. The trimethylenemethane moiety is quite non-planar with the central atom displaced 0.28 » from the plane of the other three carbon atoms. The structure is compared to several previously-reported iron complexes which have trimethylenemethane type ligands. The CrCO bond trans to the triphenylphosphine is short [mean = 1.83(1) » ] compared with the other two [mean = 1.86(1), 1.87(1) » ] in the structure. This is discussed in terms of a trans influence. The effects of the σ and π donor or acceptor properties of various ligands upon the metalCO bond lengths and CO stretching frequencies in numerous metal complexes ad discussed." @default.
• W2034983888 created "2016-06-24" @default.
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• W2034983888 date "1974-11-01" @default.
• W2034983888 modified "2023-10-13" @default.
• W2034983888 title "The crystal structure of trimethylenemethanechromium tricarbonyltriphenylphosphine" @default.
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• W2034983888 doi "https://doi.org/10.1016/s0022-328x(00)88208-x" @default.
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