Synthesis and Spectroscopic Studies of Alkoxoantimony(V) Schiff Base Complexes and Heterobinuclear Complexes of Antimony(V) with Boron

摘要

Reactions of Sb(OPr~l)_5 (prepared in situ by the reaction of NaOPr~i and SbCl_5) with one equivalent of benzothiazoline ligands, HNC_6H_4SC(R)CH:C(OH)COOCH_3 in refluxing benzene yield the corresponding derivatives of the type [OPr~i]_3Sb[SC_6H_4NC(R)CH.:C(0)COOCH_3] (1a-1e). The reactions proceed with the opening of benzothiazoline ring. The equimolar reactions of the compounds la-le with PhB(OH)_2 have been carried out in refluxing benzene resulting in the het_erobinuclear derivatives PhB(μ-O)_2Sb[SC_6H_4NC(R)CH:C(0)COOCH_3][OPr~i] (2a-2e). All the compounds have been characterized by the elemental analysis and molecular weight determinations, and probable structure has been proposed on the basis of IR and NMR (~1H,~(13)C, and ~(11)B) spectroscopic evidences.