SYNTHESIS, SPECTROSCOPIC AND STRUCTURAL CHARACTERIZATION OF CHLOROBIS(METHYL PYRUVATE THIOSEMICARBAZONE)COPPER(I) AND CHLOROBIS(TRIPHENYLPHOSPHINE)(METHYL PYRUVATE THIOSEMICARBAZONE)COPPER(I) TOLUENE SOLVATE (2/1)

Two new compounds, chlorobis(methyl pyruvate thiosemicarbazone)copper(I), [Cu(Hmpt)2Cl] (A), and chlorobis(triphenylphosphine)(methyl pyruvate thiosemicarbazone)copper(I) toluene solvate (2/1), [Cu(PPh3)2(Hmpt)Cl].0.5C7H8 (B) have been synthesized and characterized using spectroscopic studies and single-crystal X-ray diffraction methods at 293 K. Compound A crystallizes in space group C2/c, with a = 14.695(1), b = 13.775(1), c = 10.251(1) angstrom, beta = 113.38(1)-degrees, V = 1904.7 angstrom-3; compound B crystallizes in space group P1BAR, with a = 17.871(7), b = 10.681(2), c = 11.695(7) angstrom, alpha = 74.90(1), beta = 86.65(4), gamma = 83.66(2)-degrees, V = 2141 angstrom-3. The crystal structures were solved by the heavy-atom method for A and by direct methods for B and refined to R values of 0.053 for both compounds. In A the copper and chlorine atoms lie on a crystallographic two-fold axis and the trigonal coordination around copper involves, besides chlorine, two sulfur atoms from two Hmpt molecules. In B the copper is tetrahedrally four-coordinated involving a chlorine atom, a sulfur atom from the Hmpt molecule and the phosphorus atoms of the two PPh3 molecules. In both compounds the ligand is neutral, monodentate through the sulfur atom and shows the configuration Z E Z about the C(2)-N(3), C(1)-N(2) and C(2)-C(3) bonds (with respect to possible donating centres O(1), N(3) and S). The main vibrational bands are also reported and discussed.