1. Allen, F. H., Kennard, O., Watson, D. G., Brammer, L., Orpen, A. G., and Taylor, R. (1987)J. Chem. Soc. Perkin Trans. II, Sl-S19.
2. Fink, J., and Regitz, M. (1986)Chem. Ber. 119, 2159?72.
3. Fukuyama, T., and Kuchitsu, K. (1970)J. Mol. Struct. 5, 131?145.
4. Husebye, S., Maartmann-Moe, K., Bozak, R. E., and Rinehart, K. L. (1985)Acta Chem. Scand. Ser. B 39, 55?64.
5. International Tables for X-Ray Crystallography. (1974) Vol. IV (Kynoch Press, Birmingham) (Present Distributor D. Reidel, Dordrecht).