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Vanadium(V) phenolate complexes for ring opening homo- and co-polymerisation of [epsilon]-caprolactone, L-lactide and rac-lactide

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posted on 25.01.2016 by Feijie Ge, Yi Dan, Yahya Al-Khafaji, Timothy J. Prior, Long Jiang, Mark Elsegood, Carl Redshaw
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.

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  • Science

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  • Chemistry

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RSC Adv.

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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.

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© The Authors. Published by the Royal Society of Chemistry.

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This work is made available according to the conditions of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/

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2015

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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/

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2046-2069

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en

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