Issue 28, 2013

Imino phenoxide complexes of niobium and tantalum as catalysts for the polymerization of lactides, ε-caprolactone and ethylene

Abstract

Imino phenoxide complexes of Nb and Ta show precise control towards the solvent free ring-opening polymerization of lactides (LA) and ε-caprolactone (CL). There is a close proximity between the observed number average molecular weight (Mn) and theoretical molecular weight and the molecular weight distributions (MWDs) were found to be narrow. Analysis of low molecular weight oligomers of LA synthesized from these compounds revealed that the ligand is incorporated as one of the end terminal groups in the polymer chain. In addition, these complexes were realized to be precatalysts for the polymerization of ethylene.

Graphical abstract: Imino phenoxide complexes of niobium and tantalum as catalysts for the polymerization of lactides, ε-caprolactone and ethylene

Supplementary files

Article information

Article type
Paper
Submitted
03 Apr 2013
Accepted
08 May 2013
First published
09 May 2013

Dalton Trans., 2013,42, 10304-10314

Imino phenoxide complexes of niobium and tantalum as catalysts for the polymerization of lactides, ε-caprolactone and ethylene

T. K. Saha, M. Mandal, M. Thunga, D. Chakraborty and V. Ramkumar, Dalton Trans., 2013, 42, 10304 DOI: 10.1039/C3DT50752A

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