Synthesis and characterization of Cu(II) and Ni(II) complexes of some 4-bromo- N -(di(alkyl/aryl)carbamothioyl) benzamide derivatives

Gün Binzeta, Nevzat Külcüa, Ulrich Flörkeb & Hakan Arslancd* a Department of Chemistry, Faculty of Arts and Science , Mersin University , Mersin, TR-33343, Turkey b Department of Chemistry , University of Paderborn , Paderborn, D-33098, Germany c Department of Chemistry, Faculty of Pharmacy , Mersin University , Mersin, TR-33169, Turkey d Department of Natural Sciences , Fayetteville State University , Fayetteville, NC-28301, USA * E-mail: hakan.arslan.acad@gmail.com 4-Bromo-N-(di-R-carbamothioyl)benzamide (R = methyl, ethyl, n-propyl, n-butyl and phenyl) ligands and their Ni(II) and Cu(II) complexes have been synthesized and characterized by elemental analyses, FT-IR and 1H-NMR spectroscopy. The crystal and molecular structure of bis(4-bromo-N-(di-n-propylcarbamothioyl)benzamido)nickel(II) has been determined from single crystal X-ray diffraction data. It crystallizes in the triclinic, space group P 1, Z = 2 with a = 9.286(2) Å, b = 13.215(3) Å, c = 14.125(3) Å, α = 64.180(5)°, β = 85.483(6)°, γ = 83.067(5)°, V = 1548.3(7) Å3 and D Calcd = 1.594 mg m−3. Loss of the N–H proton resonance and the N–H stretching vibration and the shift of the ν C=O and ν C=S stretching vibrations confirm formation of the metal complexes. These studies have shown that the metal complexes are neutral cis-[ML2].