MOTIONAL HETEROGENEITY AND POLYMORPHISM OF BISPHENOL-A DIACETATE

被引：6

作者：

CASARINI, D ^{[1
]}

HARRIS, RK ^{[1
]}

KENWRIGHT, AM ^{[1
]}

机构：

[1] UNIV BOLOGNA,DEPT ORGAN CHEM,I-40126 BOLOGNA,ITALY

来源：

MAGNETIC RESONANCE IN CHEMISTRY | 1993年 / 31卷 / 06期

关键词：

C-13; NMR; C-13 CP MAS; MOTIONAL HETEROGENEITY; POLYMORPHISM; BISPHENOL-A DIACETATE;

D O I：

10.1002/mrc.1260310605

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two polymorphs of bisphenol-A diacetate 12,2-bis(p-acetoxyphenyl)propane] were characterized by solid-state C-13 cross-polarization magic-angle spinning NMR, X-ray powder diffraction and differential scanning calorimetic measurements. The structure of one polymorph was determined by single-crystal x-ray diffraction methods, and shown to have two molecules in the asymmetric unit. The two polymorphs show markedly different molecular mobilities, as reflected in variable-temperature solid-state NMR measurements, with one polymorph exhibiting motional heterogeneity in the flipping of the phenylene rings.

引用

页码：540 / 547

页数：8

共 26 条

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