Study of ligand isomeric complexes of N-furfurylsalicylaldimine

Abstract

The ligand isomeric complexes (OC₄H₃CH₂NCHPhOH, A, and OC₄H₃CHNCH₂PhOH, B) of N-furfurylsalicylaldimine with Co^III, Ni^II Cu^II, and Pd^II have been synthesised. The nature of the isomerism was characterised by the ¹H n.m.r. spectral data for the azomethine group, CN group frequencies, and electric polarization. The complexes with V^IVO, Cr^III, Mn^II, Fe^III, Pt^II, Be^II, and Zn^II were obtained in the A isomeric form. The ¹H n.m.r. spectra of both the isomers of the cobalt(III) complexes indicated a trans configuration. An electric polarization study of nickel(II) complexes also suggested that both isomeric complexes had the trans configuration and that they were linkage isomers containing ligand isomers A and B. The participation of the furan oxygen in co-ordination was indicated in the A isomeric form of complexes with Pd^II and Zn^II. The characterisation of the isomers was supplemented by u.v. spectra.