کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1334759 | 979453 | 2012 | 8 صفحه PDF | دانلود رایگان |
Dichloro zinc complexes with (S)-1-phenyl-N-[(S)-1-(pyridin-2-yl)ethyl]ethanamine (PMMA) and (S)-1-(6-methylpyridin-2-yl)-N-[(S)-1-phenylethyl]ethanamine (MPMMA) were prepared and characterised by X-ray diffraction. The catalytic activity of the dimethyl complexes, generated in situ, was high in the ring opening polymerization of rac-lactide. Specifically, the dimethyl derivative of (PMMA)ZnCl2 yielded a highly stereocontrolled polylactide with Pr = 0.84.
Novel dichloro zinc complexes bearing homochiral pyridyl amine derivatives, after methylation at the zinc atom, were assessed for the ROP of rac-LA, yielding highly stereoselective PLA with Pr up to 0.84.Figure optionsDownload as PowerPoint slideHighlights
► Pyridyl amine based dichloro Zn(II) complexes as catalyst precursors.
► Dimethyl derivatives proved to be highly stereoselective towards the ROP of rac-lactide.
► Living polymerization with a maximum heterotacticity up to 0.84.
Journal: Polyhedron - Volume 43, Issue 1, 13 August 2012, Pages 55–62