The recent appearance of a paper describing an experimental nmr study by B. L. Shapiro and coworkers3 prompts us to report some of our calculations on molecules which contain a phenyl group attached to a cyclohexane ring. These calculations were carried out with the aid of a force field method previ
Conformations of the thiathiophthenes and related molecules
β Scribed by Stanley C. Nyburg; Giannoula Theodorakopoulos; Imre G. Csizmadia
- Publisher
- Springer
- Year
- 1977
- Tongue
- English
- Weight
- 495 KB
- Volume
- 45
- Category
- Article
- ISSN
- 1432-2234
No coin nor oath required. For personal study only.
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## Abstract The radical anions of 6aβthiathiophthenes ([1,2]dithiolo[1,5β__b__] [1,2]dithioles), I(R), convert into those of 4__H__βthiapyranβ4βthiones, III(R), via __cis__β__trans__ isomerization. The reaction is slowed down when the size of the substituent R in the 2,5βpositions of 6aβthiathiopht
## Synopsis Leucine-enkephalin (Try1-Gly2-Gly3-Phe4-Leu5) has been crytallized as a trihydrate from water solution. X-ray diffraction reveals a tightly folded molecular conformation with two fused BIII-(Gly2-Gly3) and BI-(Gly3-Phe4) turns. The Tyr' and Phe4 aromatic rings have a close orthogonal a