| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1338600 | Polyhedron | 2013 | 7 Pages |
A series of monomeric coordination compounds containing zinc(II) chloride or zinc(II) bromide and the 1,2-diamine ligands TMEDA, TEEDA, (R,R)-TMCDA, (R,R)-TECDA and cis-TMCDA have been synthesised and structurally characterised using X-ray diffraction analysis. All but one complex could be successfully used as initiators for the solvent-free ring-opening polymerisation of d,l-lactide. In particular, the polylactide (PLA) prepared with compounds containing (R,R)-TECDA is obtainable in high yields with molecular weights suitable for industrial applications. Thus a class of stable, easy to synthesise and efficient PLA catalysts with neutral ligands is introduced.
Graphical abstractA series of monomeric coordination compounds containing zinc(II) chloride or zinc(II) bromide and the 1,2-diamine ligands TEEDA, (R,R)-TMCDA, (R,R)-TECDA and cis-TMCDA were synthesised, structurally characterised and could be successfully used as highly stable initiators for the solvent-free ring-opening polymerisation of d,l-lactide.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Synthesis and structural characterisation of six diamine-zinc complexes. ► Unexpected reactivity in ring-opening polymerisation of lactide. ► Great robustness against industrial conditions of lactide polymerisation. ► Low-priced starting materials for green polymerisation chemistry.
