کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1304285 | 974814 | 2010 | 5 صفحه PDF | دانلود رایگان |
The reactions of 2,2′-ethylidene-bis(4,6-di-tert-butylphenol) (EDBPH2) with sodium/potassium and (nBu)2 Mg in tetrahydrofuran (THF), give [(EDBP)2 Mg][(Na)2(THF)5]·THF (1) and [(EDBP)2 Mg][(K)2(THF)5]·THF (2) in high yield. Experimental results show that sodium/potassium complexes 1 and 2 are efficient catalysts for the ring-opening polymerization of lactides. Furthermore, complexes 1 and 2 have slight isotactic selectivity for the ring-opening polymerization of rac-lactide.
Figure optionsDownload as PowerPoint slideThe reaction of EDBPH2 with sodium/potassium and Mg(nBu)2 with a molar ratio of 2:2:1 in THF give complexes of [(EDBP)2 Mg][(Na)2(THF)5]·THF(1) and [(EDBP)2 Mg][(K)2(THF)5]·THF(2). Experimental results show that sodium/potassium complexes 1 and 2 are efficient catalysts for the ring-opening polymerization of lactides.
Journal: Inorganic Chemistry Communications - Volume 13, Issue 8, August 2010, Pages 919–923