ABSOLUTE-CONFIGURATION ASSIGNMENTS FOR POLY(METHYL METHACRYLATE) AND POLY(ALPHA-METHYLSTYRENE) USING PROTON-DETECTED HETERONUCLEAR SHIFT-CORRELATED NMR-SPECTROSCOPY

被引：16

作者：

BERGER, PA

KOTYK, JJ

REMSEN, EE

机构：

[1] Physical Sciences Center, Monsanto Corporate Research, Monsanto Company, St. Louis, Missouri 63198

来源：

MACROMOLECULES | 1992年 / 25卷 / 26期

关键词：

D O I：

10.1021/ma00052a026

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Absolute configuration assignments of poly(methyl methacrylate) (PMMA) and poly(alpha-methylstyrene) (PAMS) are derived from proton-detected heteronuclear shift-correlated NMR spectra. When recorded with high digital resolution, spectra display characteristic skewed coupling patterns caused by passive geminal methylene coupling in tetrads that lack a center of symmetry. It is shown how this information can be used for interpreting NMR spectra of vinyl polymers. A partial hexad interpretation of the methylene C-13 spectrum of PMMA is given. Many new and corrected configuration assignments are derived for C-13 and H-1 peaks in PAMS.

引用

页码：7227 / 7233

页数：7

共 27 条

[1] H-1 AND C-13 ASSIGNMENTS FROM SENSITIVITY-ENHANCED DETECTION OF HETERONUCLEAR MULTIPLE-BOND CONNECTIVITY BY 2D MULTIPLE QUANTUM NMR [J].