Preparation and characterization of metal complexes containing a NS donor ligand derived from S-benzyldithiocarbazate and p-nitrobenzaldehyde. X-ray crystal structure of the nickel(II) chelate |
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Authors: | Yu-Peng Tian Chun-Ying Duan Zhong-Lin Lu Xiao-Zeng You Hoong-Kun Fun Kandasamy Sivakumar |
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Affiliation: | (1) Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing University, Centre for Advanced Studies in Science and Technology of Macrostructures, 210093 Nanjing, P. R. China;(2) X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 118000 USM, Penang, Malaysia |
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Abstract: | Summary A series of metal (Cu, Ni, Zn, Cd and Pd) complexes of a Schiff base ligand derived from S-benzyldithiocarbazate and p-nitrobenzaldehyde were prepared and characterized. The Schiff base acts as a single negatively-charged bidentate ligand forming stable neutral metal complexes. Magnetic and spectroscopic data suggest a square planar structure for the CuII, NiII and PdII chelates. Single X-ray diffraction analysis of the NiII chelate established that the Schiff base loses a proton from its tautomeric thiol form and coordinates to the metal via the thiolato sulfur and -nitrogen. The geometry around NiII is square planar with two equivalent Ni-N and Ni-S bonds; the two nitrobenzyl rings and the coordination plane are almost isoplanar, giving a delocalized electronic system. |
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