1. Reviews: (a) Mehrotra, R. C.; Rohra, R.; Gaur, D. P.Metalβ-Diketonates and AlliedDerivatives; Academic Press: London, New York, San Francisco, 1978; pp 31−42, 235. (b) Siedle, A. R. InComprehensive Coordination Chemistry; Wilkinson, G., Gillard, R. D., McCleverty, J. A., Eds.; Pergamon Press: Oxford, 1987; Vol. 2, p 378.