Affiliation:
1. Department of Chemistry, A.P.C. College, New Barrackpore, 24 Parganas (N), India
2. University of Kalyani, Kalyani 741 235, W.B., India
Abstract
The chelating behaviour of the title pro-ligand, 1 (MPyPzCH), is demonstrated by preparation of a range of its distorted-octahedral CoII, NiIIand CuIIcomplexes with various counter ions, X (X = Cl, Br, NO3, SCN, BF4, or ClO4). The neutral, tetradentate ligand appears to bind through the pyrazolyl 2Nand pyridyl 1′N, amidic oxygen (ketonic form) and the terminal N of the hydrazide residue, respectively. The anions (X) in all cases are coordinated. The ESR spectra of some of the CuIIcomplexes indicate dx2– y2as ground state.
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