1. Ebsworth, E.A.V. (1968) in The Organometallic Compounds of Group IV Elements, ed. A.G. MacDiarmid, Vol. 1, Part 1, Marcel Dekker, New York.
2. For reviews in this area see Cowley, A.H. (1984) Polyhedron, 3, 389; and Cowley, A.H. (1984) Ace. Chem. Res., 17, 386.
3. Bos, A. and Ogden, J.S.(1973) J. Phys. Chem., 77, 1513.
4. Herzberg, G. (1959) Molecular Spectra and Molecular Structure, Vol. 1, Spectra of Diatomic Molecules, Van Nostrand, New York.
5. Bos, A., Ogden, J.S. and Ogree, L. (1974) J. Phys. Chem., 78, 1763.