Synthesis and Properties of Tris(β-diketonato)bismuth(III) Complexes by the Reaction Using NaOCN as Base

Masatoshi ECHIGO*, Ryoji TAKAO and Ikuko WAKESHIMA

Department of Industrial Chemistry, Faculty of Engineering, Science University of Tokyo; Kagurazaka, Shinjuku-ku, Tokyo 162-8601 Japan

The reactions of bismuth trichloride (BiCl3) with β-diketone (acetylacetone; Hacac, benzoylacetone; Hbzac, dibenzoylmethane; Hdbzm, dipivaloylmethane; Hdpm) in the presence of sodium cyanate and additives (tetramethylurea, THF, 15-crown-5, triethylammonium chloride) in methanol/benzene solution yielded the corresponding pure tris (β-diketonato)bismuth (III) complexes. THF was the most effective additive in the reaction of BiCl3 with Hdbzm. The solubility of the isolated bismuth(III) complexes for aprotic organic solvents (benzene, THF, dichloromethane and hexane) and methanol was examined. The characterization of the isolated bismuth (III) complexes was carried out by means of IR, 1H-NMR, 13C-NMR, MS and TG measurements.

[Contents (In Japanese) ] [Contents (In English) ]