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.

Motional Heterogeneity and Polimorphysm of Bisphenol-A-Diacetate.

CASARINI, Daniele;
1993

Abstract

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.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11563/28317
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact