SYNTHESIS AND REACTIONS OF SOME NEW HETEROCYCLIC BISMUTH(III) AND BISMUTH(V) COMPOUNDS - 5,10-DIHYDRODIBENZO[B.E]BISMINE AND RELATED SYSTEMS

New heterocyclic bismuth(III) compounds, 5-(4'-methylphenyl)-5,10-dihydrodibenzo[b,e]bismine 4, its 1 0-oxa and 1 0-thia analogues 5, 6 and 7 were synthesized and their reactions with benzoyl chloride and sulfuryl dichloride were investigated. Stable 10-alkynyl, alkenyl and alkyl-5-thiabismuth(III) compounds 13-15 and 19-21 were obtained from 10-halogeno derivatives 8 and 17, but not from 3 and 16. X-Ray structure analysis of compound 13 suggests a possible role for transannular interaction between the bismuth and heteroatom functions at the 5-position for the stabilization of labile chlorine-bismuth and aliphatic carbon-bismuth bonds in those systems.