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Bismuth(III) Complexes Based on Bis(triazol) Ligands: Effect of Fluorine Substitution on the Structure and Catalysis for the Polymerization of Glycolide
Author(s) -
Gao Jian,
Yuan Yu,
Cui AiJun,
Tian Feng,
Chen ShengChun,
He MingYang,
Chen Qun
Publication year - 2016
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201500814
Subject(s) - substituent , chemistry , polymerization , benzene , ligand (biochemistry) , catalysis , bismuth , crystal structure , polymer , polymer chemistry , medicinal chemistry , crystallography , organic chemistry , receptor , biochemistry
Two bismuth(III) complexes {[Bi(btx) 0.5 Cl 4 ](Hbtx)} n ( 1 ) and [Bi 2 (Fbtx)Cl 10 ](H 2 Fbtx) 2 (MeOH) ( 2 ) based on the nonfluorinated ligand 1,4‐bis[(1,2,4‐triazole‐1‐yl)methyl] benzene (btx) or the perfluorinated analogue 1,4‐bis[(1,2,4‐triazole‐1‐yl)methyl]‐2,3,5,6‐benzene (Fbtx) were synthesized and characterized. Single‐crystal X‐ray diffraction revealed that 1 is a coordination polymer consisting of an anionic one‐dimensional chain, whereas 2 shows a discrete ionic‐paired structure. Furthermore, 1 was found to be more active than 2 toward the bulk solvent‐free polymerization of glycolide, giving poly(glycolic acid) (PGA) with high molecular weights and moderate molecular weight distributions. The results indicated that the substituent effect plays an important role in controlling the structure and catalytic activity of such complexes.