MIXED-LIGAND COORDINATION-COMPOUNDS OF COPPER(I) WITH HETEROCYCLIC THIONES AND TERTIARY PHOSPHINES - THE CRYSTAL-STRUCTURE OF BIS (QUINOLINE-2-THIONE) BISTRIPHENYLPHOSPHINO COPPER(I) ETHYLSULFATE HEMIHYDRATE

Copper(II) sulfate is reduced in alcoholic media in the presence of heterocyclic thiones (i.e. pyridine-2-thione or quinoline-2-thione) and triphenylphosphine. The resulting coordination compounds consist of CU(thione)2(PPh3)2 cationic units; the counteranions are alkyl sulfate monoanions. The crystal structure of the compound prepared using quinoline-2-thione in ethanol reveals that the tetrahedal cationic units and the counteranions are arranged in rows cross-linked through hydrogen bonds formed between the oxygen atoms of the anion and water molecules. The compound crystallizes in the triclinic space group P1BAR, a = 10.69 (1), b = 13.47 (2), c = 18.75 (2) angstrom, alpha = 75.9 (1), beta = 85.6 (1), gamma = 74.7 (1)-degrees, V = 2525.5 angstrom3, Z = 2. The local copper environment is distorted tetrahedal with unequal Cu-S (2.380(2), and 2.341(2) angstrom) and Cu-P (2.301(2) and 2.316(2) angstrom) bonds; angles around copper range from 96.37(7) to 121.16(0)-degrees.