Abstract
AbstractThe reduction of 2‐cyanopyridine in the presence of N(4)‐ethylthiosemicarbazide produces 2‐pyridineformamide N(4)‐ethylthiosemicarbazone, HAm4E. Complexes with cobalt(III), nickel(II), copper(II), palladium(II) and platinum(II) have been prepared and characterized by molar conductivity, magnetic susceptibility and spectroscopic techniques. In addition, the crystal structures of HAm4E, [Co(Am4E)2](ClO4), [Ni(HAm4E)2](ClO4)2, and [Ni(HAm4E)2]Cl(OAc)·AcOH·H2O have been obtained. Coordination occurs through the pyridyl nitrogen, imine nitrogen and either the thione or thiolato sulphur atom when coordinating as the neutral or anionic ligand, respectively. Extensive hydrogen bonding occurs in both HAm4E and its metal complexes, with the amide hydrogen atoms being significant contributors.
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