SYNTHESIS AND STRUCTURAL DETERMINATIONS OF ZINC(II) COMPLEXES CONTAINING DITHIOL AND N,N-HETEROCYCLIC LIGANDS

Syntheses and single crystal structural determinations of foul zinc co mplexes are presented: a mononuclear species, Zn(bdt)(biq); two binucl ear species, [Zn(bdt)(phen)](2) and [Zn(tdt)(phen)](2) . 1,4-diphenyl- 1,3-butadiene; and an unusual trinuclear species, Zn3(tdt)(3)(phen)(2) , in which the zinc ions display either a four- or five-coordination g eometry in a single molecule. The heterocyclic ligands used are 1,10-p henanthroline (phen) and biquinoline (big), and the dithiols are 1,2-b enzenedithiol (bdt) and 3,4-dimercaptotoluene (tdt), Long range intera ctions dire to overlapping pi systems of the heterocycles are also ind icated by the structures.