Synthetic and Structural Studies of 4f-Metal Complexes of Oxalic Bis (Cyclohexylidenehydrazide)

Abstract

Oxalic bis(cyclohexylidenehydrazide) (ObCH) gave, by reaction with 4ƒ-metal chlorides, complexes of the type [Ln(ObCH)Cl₂]Cl.H₂O, where Ln ═ La(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III), Tb(III), Dy(III), and Y(III). The complexes have been studied by conductance, magnetic, electronic, i.r. and ¹H n.m.r. spectral techniques. I.r. and n.m.r. spectra indicate tetradentate coordination of ObCH through carbonyl oxygens and azomethine nitrogens with a polymeric linkage. Six coordination is proposed in the complexes.