Synthesis and characterization of bis-(2-cyano-1-methyl-3-{2-{{(5-methylimidazol-4-yl)methyl}thio}ethyl)guanidine copper(II) sulfate tetrahydrate

Complex of copper(II) with 2-cyano-1-methyl-3-{2-{{(5-methylimidazol-4yl) methyl} thio} ethyl) guanidin(xepamet) had been synthesized in 1 : 4 mole ratio of metal to the ligand in methanol. The complex was characterized by metal analysis, thermal gravimetry/differential thermal analyzer (TG/DTA), molar conductivity meter, (Fourier transform infrared spectroscopy) FT-IR, UV-Vis spectroscopy, and magnetic susceptibility balance. The molar conductivity measurement shows that the complex was 2: 1 for electrolyte and SO42- which was acting as a counter ion. The thermal analysis by Thermogravimetric (TG) indicates that the complex contained four molecules of H2O. The Infrared spectral data indicates that functional groups of (C=N) imidazole and (C-S) are coordinated to the center ion Cu2+. Magnetic moment measurement shows that the complex is paramagnetic with mu(eff) = 1.78 +/- 0.01 BM. Electronic spectra of the complex show a broad band at 608 nm (16447.23 cm(-1)) are due to Eg -> T-2g transition. Based on those of characteristics, The complex formula was estimated as [Cu(xepamet)(2)]SO(4 center dot)4H(2)O. The structure of [Cu(xepamet)(2)]SO(4 center dot)4H(2)O complex is probably square planar.