Metal Complexes of N-2-Thenylsalicylaldimine

Article abstract of DOI:10.1039/DT9820001899

The ligand isomeric complexes of N-2-thenylsalicylaldimine with Pd(II) were synthesised.The nature of the isomerism was characterised by the !H n.m.r. spectral data for the azomethine group, C=N group i.r. frequencies, and u.v spectra.The complexes with Cr(III), Fe(III), Co(III), Ni(II), Cu(II), and Pt(II) were obtained in the isomeric form (A), i.e.SC4H3CH2N=CHC6H4OH-o, and those of V(IV) an Zn(II) were obtained in the isomeric form (B), i.e.SC4H3CH=NCH2C6H4OH-o.From its solubility characteristics and 1H n.m.r. spectera, the palladium(II) complex containing ligand isomer (A) was shown to be a binuclear complex in which the phenolic o xygen displays three-co-ordination.The subnormal magnetic moment at room temperature and the cryomagnetic data of the copper(II) complex suggested a similar binuclear configuration having a large antiferromagnetic interaction(J=-175cm^-1,g=2.4).The cryomagnetic data of the iron(lll) complex indicated a thermal equilibrium between nearly equi-energetic spin-paired(2T₂) and spin-free(6A₁) configurations of iron(lll).Co-ordination of the thiophene sulphur was indicatedin the (B) isomeric form of the complexes of Pd(ll) and Zn(ll).

Full text of DOI:10.1039/DT9820001899

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