Co-ordination Chemistry of Some First Row Transition Metal Complexes with Multi-dentate Ligand (1-benzoyl-3-(4-methylpyridin-2-yl) thiourea), Spectral, Electrochemical and X - ray Single Crystal Studies

Cd(II) and Cu(II) perchlorate were coordinated with 1- benzoyl - 3-(4-methylpyridin -2-yl) thiourea ligand. All the prepared compounds are deliberately investigated by all possible spectral tools. A comparative study on IR spectra reveals a neutral bidentate coordinating nature of the ligand towards the two metal ions. The Uv/Vis spectra of the complexes display d-d and MLCT transition bands proposed four coordination geometry for the complexes in different forms. MS analysis data are concerned especially with the base peak which is corresponding to C28H26N6O2S2Cu and C28H26N6O2S2CdCl2O8 ions. The fragmentation patterns are relatively matched with each others. Electrochemical study was carried out on Cu(II) complex using platinum wire and Ag/AgNO3 as counter and reference electrodes, respectively. The data reflect the irreversible nature of the electrode couple and showed two successive one electron transfer process. X-ray single crystal studies are used to verify the four coordination geometry proposed as well as calculating the crystal parameters beside the structural refinements.