摘要:
Novel Cd (II) bromide complexes [LaCdBr2], [LbCdBr2] and [LcCd(mu-Br)Br](2) have been synthesized and characterized. [LaCdBr2] and [LbCdBr2] were distorted tetrahedral and trigonal bipyramidal geometry around metal, respectively, depending on the coordination of the nitrogen atom of N '-substituted amine moiety and the cadmium center. However, [LcCd(mu-Br)Br](2) reveals a bromo-bridged 6-coordinated dimeric species. Specifically, the catalytic activity of [LbCdBr2] (1.13 x 10(5) g PMMA/mol Cd.h) in the polymerization of methyl methacrylate (MMA) in the presence of modified methylaluminoxane (MMAO) at 60 degrees C was higher than that of [LaCdBr2] (5.03 x 10(4) g PMMA/mol Cd.h) and reference complex [CdCl2] (3.53 x 10(4) g PMMA/mol Cd.h). (C) 2014 Elsevier B.V. All rights reserved.