Crystal and Molecular Structures of Mononuclear Coordinated Copper(I) Complexes with Thio-triazole and Thio-triazine based Schiff base Ligands

Reaction of 4-amino-5-methyl-1,2,4-triazol-3(2H)-thione (AMTT) and 4-amino-6-methyl-3-thio-3,4-dihydro-1,2,4-triazin-5(2H)-one (AMTTO) with 2-hydroxybenzaldehyde led to the synthesis of corresponding Schiff base ligands [(Z)-4-((2-hydroxybenzylidene)amino)-3-methyl-1H-1,2,4-triazole-5(4H)-thione (L1) and (Z)-4-((2-hydroxybenzylidene)amino)-6-methyl-3-thioxo-3,4-dihydro-1,2,4-triazin-5(2H)-one (L2)]. Treatment of synthesized Schiff base ligands with CuCl provided the complexes [Cu(L1)(3)Cl] (1) and [Cu(L2)(2)Cl] (2). Synthesized complexes were characterized by elemental analyses, IR spectroscopy and X-ray diffraction studies. Complex1consists of a metal ion coordinated with one chloride ion and three Schiff base ligands via sulfur atoms in a distorted tetrahedral environment, whereas2consists of a metal ion coordinated with one chloride ion and two sulfur atoms from two different Schiff base ligands in a trigonal planar arrangement. Crystal data for1at -153 degrees C revealed an orthorhombic space groupFdd2,a= 34.8088(7),b= 33.8156(8),c= 11.6142(2) angstrom,Z= 16,R-1= 0.0357; for2at -178 degrees C the symmetry was triclinic, space groupP1,a= 7.27520(10),b= 15.4620(2),c= 23.7985(4) angstrom,alpha= 72.1964(13),beta= 86.5208(12),gamma= 89.8597(11)degrees,Z= 4,R-1= 0.0359.