Abstract
Zinc, manganese, copper and nickel complexes ( 1– 4) were synthesized by the template condensation of 2,6-diformyl-4-methylphenol ( dfp) and 2-(methylmercapto)aniline with metal perchlorate salts in presence of pyrazole and triethylamine. These complexes are characterized by analytical, spectral, magnetic and electrochemical techniques. Based on these experimental data, the molecular composition of the complexes is found to be [M 2L 2](ClO 4) 2 instead of the pyrazole bridged binuclear complex. This is confirmed by X-ray crystal structures of zinc, 1 and manganese, 2 complexes. The geometry around the zinc atoms is pseudo octahedral with N 2O 2S 2 coordination. The asymmetric unit of manganese complex 2 consists of two crystallographically independent half molecules ( 2A and 2B), two perchlorate anions and water molecules. Manganese atoms in 2A have distorted pentagonal bipyramidal geometry and in 2B they have irregular geometry.
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