SYNTHESIS AND CHARACTERIZATION OF COPPER(I) COMPLEXES WITH TRIPHENYLPHOSPHINE AND HETEROCYCLIC THIONE LIGANDS - THE CRYSTAL-STRUCTURE OF (THIAZOLIDINE-2-THIONE) (BIS-TRIPHENYLPHOSPHINE) COPPER(I) CHLORIDE

Reactions of [Cu(PPh3)(3)Cl] with heterocyclic thiones (L) (L = pyridi ne-2-thione (py2SH), 1,3-thiazolidine-2-thione (tzdtH),benz-1,3-imidaz oline-2-thione (bzimtH(2)), benz-1,3-thiazoline-2-thione (bztztH), 4,5 -diphenyl-imidazol-2-thione (dpimtH), 3-methylbenz-1,3-thiazoline-2-th ione (mbztztH), 6-ethoxybenz-1,3-thiazoline-2-thione (etbztztH), 4-hyd roxy-5-methyl-pyrimidine-2-thione (hympmtH), 4,6-dimethyl-pyrimidine-2 -thione (dmpmtH), 4-mercapto-1H-pyrazolo[3,4d] pyrimidine (pyrpmtH) an d quinoline-2-thione (quintH)) yield mononuclear complexes of the gene ral formula [Cu(PPh3)(2)(L)Cl]. The complexes were characterized by va rious physicochemical methods. The crystal structure of [Cu(PPh3)(2)(t zdtH)Cl] was determined by single-crystal X-ray diffraction methods. T he yellow crystals are monoclinic, space group P2(1)/c with a = 14.31( 2), b = 10.099(10), c = 24.52(2) Angstrom, beta = 93.53(7)degrees and Z = 4. The copper atom has a pseudotetrahedral geometry with bond leng ths Cu-S = 2.418(5), Cu-Cl = 2.344(3), Cu-P(1) = 2.283(3) and Cu-P(2) = 2.298(2) Angstrom. The structure was solved by direct methods with a final R value of 0.0562. (C) 1998 Elsevier Science S.A.