Synthesis and spectral characterization of homo-and hetero-dinuclear complexes with a new septadentate Schiff base ligand.

Reaction between 3-formylsalicylic acid and bis-(2-aminophenyl)-disulphide yields a septadentate Schiff base with NSO donor frame of which the inner compartment is NSO and the outer is OO type. It forms several complexes with inner copper centre and outer nontransition/transition metal ions. The complexes have been characterised by elemental analyses, spectral (IR, absorption, diffused reflectance), thermal and magnetic data. Dinuclear copper complexes exhibit subnormal magnetic moments (≈ 0.80 BM), showing magnetic exchange, and six-line solid-state ESR spectra at 77 K. [ABSTRACT FROM AUTHOR]