TỔNG HỢP VÀ NGHIÊN CỨU PHỨC CHẤT CỦA MỘT SỐ PHỐI TỬ VÒNG LỚN KIỂU BAZƠ SCHIFF TRÊN CƠ SỞ THIOSEMICACBAZIT

Abstract

Benzilthiosemicarbazone (BzTS) has been synthesized by reacting benzil and thiosemicacrbazide in the absence of metal salt and using high dilution technique. A 12-membered macrocyclic Schiff base, 5,6,11,12-tetraphenyl-1,2,4,7,8,10-hexaaza-xiclodoeca-4,6,10,12-tetraen-3,9-dithion (LH₂), was prepared from BzTS in methanol by using CuCl₂ as template with fairly good yield. Alternatively, when using CuSO₄ and PdCl₂ in place of CuCl₂ the products formed are tetradentate (N, N, N, N) macrocyclic complexes CuL and PdL. All ligands and complexes have been characterized by spectroscopic studies (IR, ¹HNMR and MS). A metal – template mechanism for the formation of macrocyclic ligand and complexes was proposed.