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Title: Vanadium(V) phenolate complexes for ring opening homo- and co-polymerisation of [epsilon]-caprolactone, L-lactide and rac-lactide
Authors: Ge, Feijie
Dan, Yi
Al-Khafaji, Yahya
Prior, Timothy J.
Jiang, Long
Elsegood, Mark R.J.
Redshaw, Carl
Issue Date: 2015
Publisher: © The Authors. Published by the Royal Society of Chemistry.
Citation: GE, F. ...et al., 2015. Vanadium(V) phenolate complexes for ring opening homo- and co-polymerisation of [epsilon]-caprolactone, L-lactide and rac-lactide. RSC Advances, 6, pp. 4792-4802.
Abstract: The vanadyl complexes [VO(OtBu)L1] (1) and {[VO(OiPr)]2(m-p-L2p)} (2) {[VO(OR)]2(m-p-L2m)} (R ¼ iPr 3, tBu 4) have been prepared from [VO(OR)3] (R ¼ nPr, iPr or tBu) and the respective phenol, namely 2,20- ethylidenebis(4,6-di-tert-butylphenol) (L1H2) or a,a,a 0 ,a 0-tetra(3,5-di-tert-butyl-2-hydroxyphenyl–p/m-) xylene-para-tetraphenol (L2p/mH4). For comparative studies, the known complexes [VO(m-OnPr)L1]2 (I), [VOL3]2 (II) (L3 H3 ¼ 2,6-bis(3,5-di-tert-butyl-2-hydroxybenzyl)-4-tert-butylphenol) were prepared. An imido complex {[VCl(Np-tolyl)(NCMe)]2(m-p-L2p)} (5) has been prepared following work-up from [V(Np-tolyl)Cl3], L2pH4 and Et3N. The molecular structures of complexes 1–5 are reported. Complexes 1–5 and I and II have been screened for their ability to ring open polymerise 3-caprolactone, L-lactide or rac-lactide with and without solvent present. The co-polymerization of 3-caprolactone with L-lactide or rac-lactide afforded co-polymers with low lactide content; the reverse addition was ineffective.
Description: This is an Open Access Article. It is published by Royal Society of Chemistry under the Creative Commons Attribution 3.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/
Version: Published
DOI: 10.1039/C5RA24816G
URI: https://dspace.lboro.ac.uk/2134/20131
Publisher Link: http://dx.doi.org/10.1039/C5RA24816G
Appears in Collections:Published Articles (Chemistry)

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