New compounds of formula [AuL(PMe(3))]Cl [L = imidazolidine-2-thione (
Imt), 1,3-diazinane-2-thione (Diaz), 1,3-diazepine-2-thione (Diap) and
their derivatives] have been synthesized and characterized by element
al analysis, and i.r., C-13- and P-31-n.m.r. spectroscopies. The Diap
ligand, which incorporates the thione in a seven-membered heterocyclic
ring, binds more strongly to Au-I compared to its Diaz (six-membered
ring) and Imt (five-membered ring) analogues.