- 作者: El-Asmy,A.A.
- 作者服務機構: Chemistry Department, Sana'a University, Yemen Arab Republic
- 中文摘要: The preparation and characterization of a series of new coordination compounds of Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) containing 0-methyl- or 0-chlorobenzoyl-4-phenyl-3-thiosemicarbazide (HMBPT, HCBPT=HL) are reported. The reaction products were investigated by analyses, electrolytic conductance, magnetic susceptibility, reflectance and IR spectral studies. The IR spectra show that HMBPT and HCBPT coordinate with the metal ions via different coordination sites (NS and/or NO). The spectral data support the suggestion that the ligands form bis- chelates with Ni(II) and Cu(II) of square planar stereochemistry and of general formulae ML/sub 2/.bcdot.nH/ sub 2/O, where L is the uninegatively charged bidentate ligand. The Co(II) ion forms octahedral and tetrahedral structures with HMBPT and HCBPT, respectively. The ligand field parameters (D/sub q/,B and .beta.) for the Co(II) chelates were calculated using the averaged-ligand-field approximation. The influence of the benzene ring substituents (o-chloro or o-methyl) on the stereochemistry are discussed. Also,the formation of the complexes in solution was tested by the pH-metric method.
- 英文摘要: --
- 中文關鍵字: Chelate; Transition Metals; Structure; Synthesis; Ligand Field Parameters
- 英文關鍵字: 鉗合物;過渡金屬;合成;構造;配位場參數