Summary
Acetone nicotinoyl hydrazone (ANII) complexes of the types M(ANH)Cl2 · nEtOH and M(ANH-H)2 H2O (where M = MnII FeII, CoII, NiII, CuII or ZnII and n = 0,1 or 2) have been prepared and their structures studied by molar conductance, i.r. and electronic spectra, and room temperature magnetic measurements. All the complexes arc nonionic in a 0.001 M solution of formic acid. Magnetic and electronic spectral studies show that all the complexes are spin-free regular or distorted octahedra except Mn(ANH)Cl2 and Co(ANH)CI2 which are tetrahedral. The distorted octahedral geometry of Cu(ANH-H)2 · H2O has also been confirmed from its sold state e.s.r spectrum at 77 K. From i.r. spectral studies, ANH has been found to act as a tridentate ligand in all the complexes except Mn(ANH)Cl2 where it behaves as a bidentate ligand.
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Aggarwal, R.C., Rao, T.R. Synthesis and structural studies of some first row transition metal complexes of acetone nicotinoyl hydrazone. Transition Met Chem 2, 21–26 (1977). https://doi.org/10.1007/BF01402671
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DOI: https://doi.org/10.1007/BF01402671