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Highly Active Yttrium Catalysts for the Ring-Opening Polymerization of ε‑Caprolactone and δ‑Valerolactone

Abstract

The activity of several yttrium alkoxide and aryloxide complexes supported by a ferrocene-based ligand incorporating two thiol phenolates, thiolfan (1,1′-bis­(2,4-di-<i>tert</i>-butyl-6-thiomethylenephenoxy)­ferrocene), was studied. The <i>tert</i>-butoxide complex could only be isolated in the ate form, while a monophenoxide complex could be obtained for OAr = 2,6-di-<i>tert</i>-butylphenolate. The synthetic utility of these yttrium complexes has been demonstrated by the ring-opening polymerization of cyclic esters, with a high activity toward ε-caprolactone and δ-valerolactone being found for the yttrium phenoxide complex

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The Francis Crick Institute

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Last time updated on 12/02/2018

This paper was published in The Francis Crick Institute.

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