Gauche/Trans Equilibria of 2,2‘-Bi-1,3-dioxanyl, 2,2‘-Dimethyl-2,2‘-bi-1,3-dioxanyl, 2,2‘-Bi-1,3-dithianyl, and 2,2‘-Dimethyl-2,2‘-bi-1,3-dithianyl in Different Media. Theory and Experiment
✍ Scribed by Chen, Wang; Lam, Yulin; Wong, Ming Wah; Huang, Hsing Hua; Liang, Eping
- Book ID
- 125996864
- Publisher
- American Chemical Society
- Year
- 2003
- Tongue
- English
- Weight
- 155 KB
- Volume
- 107
- Category
- Article
- ISSN
- 1089-5639
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📜 SIMILAR VOLUMES
The title structure (commonly known as 2,2 0 ,5,5 0 -tetraselenafulvalene or tetraselenafulvalene), C 6 H 4 Se 4 , contains two independent molecules, one of which is planar and centrosymmetric. The other molecule has a pronounced boat conformation and no imposed crystallographic symmetry. Correspon
## Refinement Hydrogen atoms were refined at idealized positions riding on the carbon atoms with C aromatic -H=0.95Å and C methyl -H=0.98Å and isotropic displacement parameters U iso (H) = 1.2U(C eq ) or 1.5U(-CH 3 ). All CH 3 hydrogen atoms were allowed to rotate but not to tip.