Crystallographic characterisation of novel Zn(II) silsesquioxane complexes and their application as initiators for the production of polylactide

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Abstract

Herein, the solid state structures of the products from the reaction of the silsesquioxane trio (iso-C4H9)(7)Si7O12(OH)(3) (1)with two equivalents of ZnMe2 in both THF and toluene are reported. In both cases tetrametallic Zn(II) complexes were isolated, with toluene [(iso-C4H9)(7)Si7O12](2)Zn4Me2 (2) was prepared while performing the reaction in THF the analogous complex [(iso-C4H9)(7)Si7O12](2)Zn4Me2(THF)(2) (3) was formed. Both species have also been characterised via H-1, C-13{H-1} and Si-29{H-1} NMR spectroscopy, which confirm the solid state structures are maintained in solution. Both 2 and 3 show modest activities for the polymerisation of rac-lactide and a heterogeneous catalyst has also been prepared. (C) 2009 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)312-316
Number of pages5
JournalPolyhedron
Volume29
Issue number1
DOIs
Publication statusPublished - 13 Jan 2010

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