Issue 1, 2008
From the journal:

Dalton Transactions

Zwitterionic bis(phenolate)amine lanthanide complexes for the ring-opening polymerisation of cyclic esters†‡§

Hellen E. Dyer,a   Saskia Huijser,b   Andrew D. Schwarz,a   Chao Wang,a   Robbert Duchateau*b  and  Philip Mountford*a  

* Corresponding authors

a Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, UK
E-mail: philip.mountford@chemistry.oxford.ac.uk

b Laboratory of Polymer Chemistry, Department of Chemical Engineering and Chemistry, University of Technology Eindhoven, Den Dolech 2, Helix, STO 1.37, P.O. Box 513, 5600 MB Eindhoven, The Netherlands

Abstract

The reaction of Sm{N(SiMe3)2}3 with the bis(phenol)amines H2O2NR (H2O2NR = RCH2CH2N(2-HO-3,5-C6H2tBu2)2; R = OMe, NMe2 or Me) gave exclusively zwitterions Sm(O2NR)(HO2NR). For R = OMe or NMe2 these were efficient catalysts for the ring-opening polymerisation of ε-caprolactone and D,L-lactide with a tendency to form cyclic esters; in contrast, no polymerisation was observed for R = Me.

Graphical abstract: Zwitterionic bis(phenolate)amine lanthanide complexes for the ring-opening polymerisation of cyclic esters

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Article information

DOI
https://doi.org/10.1039/B714583G
Article type
Communication
Submitted
21 Sep 2007
Accepted
09 Oct 2007
First published
26 Oct 2007

Dalton Trans., 2008, 32-35

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Zwitterionic bis(phenolate)amine lanthanide complexes for the ring-opening polymerisation of cyclic esters

H. E. Dyer, S. Huijser, A. D. Schwarz, C. Wang, R. Duchateau and P. Mountford, Dalton Trans., 2008, 32 DOI: 10.1039/B714583G

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