ISSN:
0006-3525
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The helical structures of poly[(S)-thiazolidine-4-carboxylic acid], in the cis and trans forms, were redetermined by using the new sets of bond angles and bond lengths established by X-ray diffraction analysis of L-thioproline. Calculations of the helical structures of poly-L-proline and poly[(S)-oxazolidine-4-carboxylic acid] were also repeated. As a result of these energy calculations, it is suggested that, in contrast to poly-L-proline and poly[(S)-oxazolidine-4-carboxylic acid], poly[(S)-thiazolidine-4-carboxylic acid] should not mutarotate from the trans to the cis form. This result is due to the fact that the energy barrier for the conversion is most likely too high. Previous experimental work is consistent with this finding.
Zusätzliches Material:
3 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/bip.1972.360110903