Spectral and structural studies of nickel(II) complexes of salicylaldehyde 3-azacyclothiosemicarbazones |
| |
Authors: | Leji Latheef Maliyeckal R Prathapachandra Kurup |
| |
Institution: | Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, Kerala, India |
| |
Abstract: | Mononuclear nickel(II) complexes with two ONS donor thiosemicarbazone ligands {salicylaldehyde 3-hexamethyleneiminyl thiosemicarbazone H2L1] and salicylaldehyde 3-tetramethyleneiminyl thiosemicarbazone H2L2]} have been prepared and physico-chemically characterized. IR and electronic spectra of the complexes have been obtained. The thiosemicarbazones bind to the metal as dianionic ONS donor ligands in all the complexes except in Ni(HL1)2] (1). In compound 1, the ligand is coordinated as a monoanionic (HL−) one. The magnetic susceptibility measurements indicate that all the complexes are mononuclear and are diamagnetic. The complexes were given the formulae Ni(HL1)2] (1), NiL1py] (2), NiL1α-pic] (3), NiL1γ-pic] · H2O (4), NiL2py] (5) and NiL2γ-pic] (6). The structures of compounds 2 and 3 have been solved by single crystal X-ray crystallography and were found to be distorted square planar in geometry with coordination of azomethine nitrogen, thiolato sulfur, phenolato oxygen and pyridyl nitrogen atoms. |
| |
Keywords: | Thiosemicarbazone Nickel(II) complex Salicylaldehyde Crystal structure |
本文献已被 ScienceDirect 等数据库收录! |
|