ISSN:
0749-1581
Keywords:
13C NMR
;
13C CP MAS
;
Motional heterogeneity
;
Polymorphism
;
Bisphenol-A diacetate
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Two polymorphs of bisphenol-A diacetate [2,2-bis(p-acetoxyphenyl)propane] were characterized by solid-state 13C 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.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1260310605
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