Issue 40, 2016

A multimetallic iron(ii)–lithium complex as a catalyst for ε-caprolactone polymerization

Abstract

Treatment of the lithium salt of β-ketimine with FeCl2(THF)1.5 in the presence of LiN(SiMe3)2 and water affords the multimetallic iron(II)–lithium complex 1, [(LMe)2Fe]3Li2O [where LMe = MeC(O)CHC(NMe)Me]. In complex 1 three separated (LMe)2Fe units are bound together by one Li2O species, which leads to the formation of an interesting {Fe3Li2O} core structure. Complex 1 can be used as a single-component initiator for the ring-opening polymerization of ε-caprolactone at room temperature, achieving a monomer conversion of 98% within 100 min, and a narrow molecular weight distribution (PDI = 1.28) of the resulting polymer.

Graphical abstract: A multimetallic iron(ii)–lithium complex as a catalyst for ε-caprolactone polymerization

Supplementary files

Article information

Article type
Communication
Submitted
07 janv. 2016
Accepted
24 mars 2016
First published
24 mars 2016

Dalton Trans., 2016,45, 15779-15782

A multimetallic iron(II)–lithium complex as a catalyst for ε-caprolactone polymerization

C. Geng, Y. Peng, L. Wang, H. W. Roesky and K. Liu, Dalton Trans., 2016, 45, 15779 DOI: 10.1039/C6DT00078A

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