Abstract

R. N. Pandey*,  A. K. Nag, Prasashti Pande and Sanjay K. Singh

Bis(1-phenyl tetrazoline)-5,5’-disulphide forms stable complexes having general formula [CoA2 (ligand) 2] X and [Ni(H2O) 4 (ligand) 2] X (A = CH3COO – and H2O, X = ClO4 -, NO3 -, SO4 - -) at pH = 6. Cobalt (II) complexes are square planar having magnetic Bis (1-phenyl tetrazoline) –5,5’-disulphide forms stable complexes having general moment 2.74 – 2.76 BM. Sub-normal magnetic moment of octahedral Ni (II) complexes observed between 1.47 – 1.66 BM indicates square planar and octahedral equilibrium. The ligand field parameters n2 /n1 = 1.61, B’ = 764.9 cm-1, 10 Dq = 9943.7 cm-1 and B = 0.96 cm-1 also supports octahedral structure. IR spectra suggest bonding through one of the disulphide sulphur of ligand.

Heterocyclic organic disulphide; spectral properties Ni(II) and Co(II) complexes

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