Issue 28, 2013
From the journal:

Dalton Transactions

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

Tanmoy Kumar Saha,a   Mrinmay Mandal,a   Madhubabu Thunga,a   Debashis Chakraborty*a  and  Venkatachalam Ramkumara  

* Corresponding authors

a Department of Chemistry, Indian Institute of Technology Madras, Chennai-600 036, Tamil Nadu, India
E-mail: dchakraborty@iitm.ac.in
Fax: +044-22574202
Tel: +044-22574223

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

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Article information

DOI
https://doi.org/10.1039/C3DT50752A
Article type
Paper
Submitted
03 Apr 2013
Accepted
08 May 2013
First published
09 May 2013

Dalton Trans., 2013,42, 10304-10314

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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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