Copper(II) and zinc(II) complexes of thiophene/furan carboxamides: Synthesis, structure and properties


BALABAN GÜNDÜZALP A. , Erk B.

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY, cilt.55, sa.7, ss.1094-1102, 2010 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 55 Konu: 7
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1134/s0036023610070168
  • Dergi Adı: RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
  • Sayfa Sayıları: ss.1094-1102

Özet

Cu(II) and Zn(II) complexes were synthesized from equimolar amounts of carboxamides; 1,8-bis(2-thiophenecarboxamido)-p-menthane (tkdam) and 1,8-bis(2-furancarboxamido)-p-menthane (furdam). The structure of the carboxamides were determined by elemental analysis; H-1 NMR, C-13 NMR, FT-IR and LC-MS spectra. The relative energies and the electronic properties (LUMO, HOMO, LUMO-HOMO gap) of the ligands were investigated theoretically by performing Semi-empirical molecular orbital theory PM3 method in Hyperchem 7 (Release). Carboxamide complexes having general formula as; monomeric, [ML]Cl-2 and dimeric [Cu(tkdam)Cl](2)Cl-2 center dot 5H(2)O were synthesized and characterized by using element analysis; FT-IR, LC-MS spectra; magnetic susceptibility, molar conductivity and thermal (TGA/DTA curve) studies. It was found that the coordination number of the monomeric complexes is four whereas dimeric's is six. The changes in the selected vibration bands in FT-IR indicate that, carboxamides behave as tetradentate ligands and coordinate to metal ions from acyl ring (through S/O) and amide carbonyl (C=O). Molar conductivity measurements indicate the 1: 2 ionic nature of the carboxamide complexes.