Highly symmetrical 24-membered macrocyclic organoantimony(V) complexes constructed from Schiff base ligands possessing two terminal carboxyl groups

Two novel organoantimony(V) complexes [Ph3SbLa]2 (1) and [Ph3SbLb]2 (2) (H2La = 5-{[(2-carboxyphenyl)methylene]amino}-4-chlorobenzoic acid, and H2Lb = 5-{[(2-carboxyphenyl)methylene]amino}-2-chlorobenzoic acid) have been synthesized by the reaction of triphenylantimony dichloride and Schiff base ligands with the ratio of 1:1, and characterized by elemental analysis, IR, 1H and 13C NMR spectroscopy. X-ray single-crystal diffraction analyses...