Issue 12, 1987

The electron spin resonance spectra of CpCr(CO)3 and CpCr(CO)2P(C6H5)3 in single crystals of their Mn analogues

Abstract

The e.s.r. spectra of CpCr(CO)3 and CpCr(CO)2L, where L is P(C6H5)3 and Cp is cyclopentadienyl, have been examined in single crystals of their respective Mn derivatives. In both cases an axis (z) passing through the chromium atom and the centre of the Cp ring is the direction of maximum g, indicating that the semi-occupied orbital is predominantly xy or x2y2, where x and y are perpendicular to z. The effective symmetry in both instances is Cs, with x lying perpendicular to the symmetry plane. In CpCr(CO)3, x is the direction of intermediate g-factor, whereas in CpCr(CO)2L, x is the direction of minimum g-factor. The reasons for this difference are discussed in terms of the energy levels of the t52ge0g manifold under Oh, C3v and Cs symmetries. The 53Cr hyperfine interaction in CpCr(CO)3 is also analysed.

Article information

Article type
Paper

J. Chem. Soc., Faraday Trans. 1, 1987,83, 3535-3540

The electron spin resonance spectra of CpCr(CO)3 and CpCr(CO)2P(C6H5)3 in single crystals of their Mn analogues

J. R. Morton, K. F. Preston, N. A. Cooley, M. C. Baird, P. J. Krusic and S. J. McLain, J. Chem. Soc., Faraday Trans. 1, 1987, 83, 3535 DOI: 10.1039/F19878303535

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