Synthesis and properties of tris(beta-diketonato) bismuth(III) complexes by the reaction using NaOCN as base

The reactions of bismuth trichloride (BiCl3) with beta-diketone (acetylacet one; Hacac, benzoylacetone; Hbzac, dibenzoylmethane; Hdbzm, dipivaloylmetha ne; Hdpm) in the presence of sodium cyanate and additives (tetramethylurea, THF, 15-crown-5, triethylammonium chloride) in methanol/benzene solution y ielded the corresponding pure tris (beta-diketonato)bismuth(III) complexes. THF was the most effective additive in the reaction of BiCl3 with Hdbzm. T he solubility of the isolated bismuth(III) complexes for aprotic organic so lvents (benzene, THF, dichloromethane and hexane) and methanol was examined . The characterization of the isolated bismuth(III) complexes was carried o ut by means of IR, H-1-NMR, C-13-NMR, MS and TG measurements.