کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9559232 1381146 2005 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chiral teleinduction in the polymerization of isocyanides
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Chiral teleinduction in the polymerization of isocyanides
چکیده انگلیسی
The effect of the length, constitution and conformation of rod-like spacers between an isocyanide group and a chiral substituent on the diastereoselectivity of the polymerization of these monomers has been studied. The chiral induction has been monitored using circular dichroism spectroscopy as well as polarimetry, and the polymers have also been characterized using NMR, gel permeation chromatography, and MALDI-TOF mass spectrometry. Of the different spacers that have been studied, the benzoate moiety is the most efficient in propagating the chiral information from stereogenic center to the polymer backbone. Remarkably, when this moiety is included in a spacer which separates the stereogenic center from the reactive carbon atom in the monomer by 21 Å an appreciable induction of activity is still observed in the resulting polymer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 46, Issue 5, 14 February 2005, Pages 1507-1521
نویسندگان
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