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Cyanato bridged binuclear nickel(II) and copper(II) complexes with pyridylpyrazole ligand: Synthesis, structure and magnetic properties |
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| Authors: | Zala Mahendrasinh Sujit B. Kumar Albert Escuer E. Suresh |
| Affiliation: | a Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara 390 002, India b Departament de Quimica Inorganica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain c Analytical Division, Central Salt and Marine Chemical Research Institute, Bhavnagar 364 002, India |
| Abstract: | Binuclear cyanate bridged nickel(II) complex [Ni(L)(NCO)]2(PF6)2 (1) and copper(II) complex [Cu(L)(NCO)]2(PF6)2 (2), where L is N,N-bis(3,5-dimethylpyrazol-1-ylmethyl)aminomethylpyridine, a tetradentate N4-coordinated ligand have been synthesized and characterized by physicochemical method. The structures of complexes 1 and 2 have been studied by single crystal X-ray diffraction analysis. The structure analysis reveals that both nickel(II) and copper(II) center are coordinated in distorted octahedral fashion and coordination mode of cyanate ligand is end-to-end (μ-1,3) for complex 1 but it is double end-on (μ-1,1) mode for complex 2. The variable temperature magnetic susceptibility data, measured from 2 to 300 K, show weak antiferromagnetic interaction with J value −6.2(1) cm−1 for complex 1, whereas complex 2 has very weak ferromagnetic interaction with J value +0.5(1) cm−1. |
| Keywords: | Tetradentate ligand Binuclear complex Copper and nickel complexes Cyanate bridge complexes Crystal structure Magnetic properties |
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