Synthesis,crystal structures and spectral studies of square planar nickel(II) complexes containing an ONS donor Schiff base and triphenylphosphine |
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| Authors: | M Muthu Tamizh Kurt Mereiter Karl Kirchner B Ramachandra Bhat R Karvembu |
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| Institution: | 1. Department of Chemistry, National Institute of Technology, Tanjore Road, Tiruchirappalli 620 015, Tamil Nadu, India;2. Institute of Chemical Technologies and Analytics, Vienna University of Technology, A-1060 Vienna, Austria;3. Institute of Applied Synthetic Chemistry, Vienna University of Technology, A-1060 Vienna, Austria;4. Department of Chemistry, National Institute of Technology, Surathkal 575 025, India |
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| Abstract: | Five mononuclear nickel(II) complexes, viz. Ni(L1)(PPh3)] (1), Ni(L2)(PPh3)] (2), Ni(L3)(PPh3)] (3), Ni(L4)(PPh3)] (4) and Ni(L5)(PPh3)] (5) (where L1, L2, L3, L4 and L5 are dianions of N-(2-mercaptophenyl)salicylideneimine, 5-methyl-N-(2-mercaptophenyl)salicylideneimine, 5-chloro-N-(2-mercaptophenyl)salicylideneimine, 5-bromo-N-(2-mercaptophenyl)salicylideneimine and N-(2-mercaptophenyl)naphthylideneimine, respectively), have been synthesized and characterized by means of elemental analysis, electronic, IR, 1H, 13C and 31P NMR spectroscopy. Single crystal X-ray analysis of two of the complexes (1 and 5) has revealed the presence of a square planar coordination geometry (ONSP) about nickel. The crystal structures of the complexes are stabilized by intermolecular π–π stacking between the ligands (L) and by various C–H···π interactions. |
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| Keywords: | Schiff base ligand Triphenylphosphine Ni(II) complexes Spectral studies Crystal structures |
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