most probable conformational arrangements of isomeric bipyrroks, bifurans, bithiophenes, thienylfurans, and biselenophenes have been investigated using the Extended Hflckel MO approach. The barrier heights between the syn and anti forms decrease sharply on going along the series bifurans bithiophene
✦ LIBER ✦
Theoretical studies on conformational isomerism of bifurans and bipyrroles
✍ Scribed by E. Ortí; F. Tomás; J. Sánchez-Marín
- Book ID
- 119115845
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 565 KB
- Volume
- 104
- Category
- Article
- ISSN
- 0166-1280
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## Abstract Various models proposed for heparin have been examined by a stereochemical approach involving contact distance criteria and potential energy calculations. The present study suggests that the model favored by Atkins and coworkers [__Biochem. J.__ (1973) **135**, 729–733 and (1974) **143*