Thiorganoantimony(V) Complexes of Schiff Bases Obtained from Substituted Salicylaldehydes and o-Phenylenediamine or 2-Aminopyridine

Abstract

A series of Schiff base complexes of the type R₃SbBrL (R = Me or Ph; L⁻ = anion of tridentate monobasic Schiff base ligand of ONN type) have been synthesized and investigated. The free ligands HL are N-(salicylidene)-o-phenylenediamine, (SPD-H), N-(2-hydroxy-1-napthalidene)-o-phenylenediamine (HNAP-H), N-salicylidene-2-aminopyridine, (SAP-H) and N-(2-hydroxy-1-naphthalidene)-2-aminopyridine (HNAP-H). Molecular weight determination in benzene reveals the monomeric nature of these complexes. Both IR and NMR data suggest hepta-coordinated structures for R₃SbBr(SPD) and R₃SbBr(HNPD) indicating the tridentate nature of the ligands SPD-H and HNPD-H. On the other hand, the complexes R₃SbBr(SAP) and R₃SbBr(HNAP) are hexa-coordinated indicating the bidentate nature of the ligands SAP-H and HNAP-H.