Electron-diffraction studies show gaseous TiMeCl3 to have a symmetrically ‘flattened’(C3v) methyl group with an H–C–Ti angle of 101.0 ± 2.2°, which is reflected in solution by a most unusual large positive H,H coupling constant of + 11.3 Hz; these data are interpreted in terms of a π-donor interaction of methyl C–H bonds with low-lying metal d-orbitals.
A. Berry, Z. Dawoodi, A. E. Derome, J. M. Dickinson, A. J. Downs, J. C. Green, M. L. H. Green, P. M. Hare, M. P. Payne, D. W. H. Rankin and H. E. Robertson, J. Chem. Soc., Chem. Commun., 1986, 520 DOI: 10.1039/C39860000520
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