Synthesis, characterization, and crystal structures of bismuth complexes with 2,6-diacetylpyridine bis(2-thenoylhydrazone)(H2dapt): [Bi(Hdapt)Cl2]·dmso·H2O and [Bi(dapt)Cl]·dmso, containing a quinquedentate ligand

Abstract

Some new bismuth complexes with 2,6-diacetylpyridine bis(2-thenoylhydrazone)(H₂dapt) have been prepared by treating the hydrazone with bismuth chloride. The chelating behaviour of the ligand has been investigated by means of i.r. spectroscopy and also by X-ray analysis which showed in [Bi(Hdapt)Cl₂] a seven-co-ordinated pentagonal-bipyramidal geometry, and in [Bi(dapt)Cl] a six-co-ordinated pentagonal pyramidal environment, in which the hydrazone occupies the basal plane.