Salicylaldehyde salicylhydrazone complexes of some transition metal ions

Abstract

Salicylaldehyde salicylhydrazone (SSH) complexes M(SSHH)2, M = Cu(II), Co(II), Mn(II), VO(IV), TiO(IV); M′(SSH2H), M′ = Cu(II), Ni(II), Co(II), and Cu1(SSHH) have been synthesised and characterised by analysis, infrared and electronic spectra and magnetic measurements, They are insoluble in common solvents and decompose above 250°C without melting. Subnormal magnetic moments have been observed in some of them. Comparison of electronic absorption bands of SSH and metal complexes show the presence of ligand-metal charge transfer bands. Cu(II) complexes are square planar while Ni(II) and Co(II) complexes have octahedral stereochemistry. In M′ (SSH2H) complexes, infrared spectra indicate the involvement of -OH, >CO and >CN groups. In others, only -OH and >CN appear bonded. Metal-metal interactions via oxo-bridge structures have been discussed in the light of magnetic, electronic and infrared data. © 1974.