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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/12823

Title: First example of a gold(I) N-heterocyclic-carbene-based initiator for the bulk ring-opening polymerization of L-lactide
Authors: RAY, L
KATIYAR, V
RAIHAN, MJ
NANAVATI, H
SHAIKH, MM
GHOSH, P
Keywords: structural-characterization
silver(i)-carbene complexes
antimicrobial activities
transfer hydrogenation
luminescent silver(i)
efficient catalysts
crystal-structures
facile synthesis
metal-complexes
nhc complexes
Issue Date: 2006
Publisher: WILEY-V C H VERLAG GMBH
Citation: EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, (18), 3724-3730
Abstract: Synthesis, structure, and catalysis studies of two Au- and Ag-based initiators, namely, [3-(N-tert-butylacetamido)-1-(2-hydroxycyclohexyl)imidazol-2-ylidene]AuCl (1c) and [3-(N-tert-butylacetamido)-1-(2-hydroxycyclohexyl)imidazol-2-ylidene]AgCl (1b), for the bulk ring-opening polymerization Of L-lactide are reported. Specifically, gold complex 1c was obtained from silver complex 1b by the transmetalation reaction with (SMe(2))AuCl. Silver complex 1b was synthesized by the treatment of 3-(N-tert-butylacetamido)-1-(2-hydroxycyclohexyl)imidazolium chloride (1a) with Ag(2)O, Compound la was synthesized directly from the reaction of N-tert-butyl-2-chloroacetamide, cyclohexene oxide, and imidazole. The molecular structures of 1a, 1b, and 1c have been determined by X-ray diffraction studies. The formation of neutral monomeric complexes with linear geometries at the metal centers was observed for both 1b and 1c. The An and Ag complexes 1c and 1b successfully catalyzed the bulk ring-opening polymerization of L-lactide at elevated temperatures under solvent-free melt conditions to produce moderate to low molecular weight polylactide polymers with narrow molecular weight distributions. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006).
URI: http://dx.doi.org/10.1002/ejic.200600407
http://dspace.library.iitb.ac.in/xmlui/handle/10054/12823
http://hdl.handle.net/10054/12823
ISSN: 1434-1948
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