Title of article
Cis and trans radicals generated in helical poly(propargyl acetate)s prepared using a [Rh(norbornadiene)Cl]2 catalyst
Author/Authors
Yoshida، نويسنده , , Yoshiaki and Mawatari، نويسنده , , Yasuteru and Seki، نويسنده , , Chigusa and Hiraoki، نويسنده , , Toshifumi and Matsuyama، نويسنده , , Haruo and Tabata، نويسنده , , Masayoshi، نويسنده ,
Issue Information
دوهفته نامه با شماره پیاپی سال 2011
Pages
6
From page
646
To page
651
Abstract
The poly(propargyl acetate) (A) having a helical cis–transoid structure was stereospecifically prepared using the Rh complex catalyst, [Rh(norbornadiene)Cl]2, in MeOH or NEt3 solvent at 0 and 40 °C in moderate yield. Electron spin resonance (ESR) analysis of the polymer revealed the formation of the cis (B) and trans (C) radicals which were produced through the thermal rotational scission of the helical cis CC bonds in the main-chain during the polymerization. The spatial and geometrical structure was successfully deduced using the two analogues’ polymers in which either methyl or methylene group is deuterated, by the aide of computer simulation of the observed ESR spectra together with the calculation of spin density of the two radicals.
Keywords
Poly(propargyl acetate) , Rh catalyst , electron spin resonance
Journal title
Polymer
Serial Year
2011
Journal title
Polymer
Record number
1736952
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