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
2′,2′-(2,2′-Dithiodiphenylene)bis(1,1,3,3-tetramethylguanidine)
✍ Scribed by Neuba, Adam ;Flörke, Ulrich ;Henkel, Gerald
- Publisher
- International Union of Crystallography
- Year
- 2007
- Tongue
- English
- Weight
- 695 KB
- Volume
- 63
- Category
- Article
- ISSN
- 1600-5368
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✦ Synopsis
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.
📜 SIMILAR VOLUMES
The title inclusion compound, 2C 15 H 10 F 6 O 2 Á3C 6 H 6 , has an organic zeolite-type structure. The diol molecules selfassemble to form a three-dimensional framework through O-HÁ Á ÁO hydrogen bonds and possible FÁ Á ÁF interactions, whereas the benzene molecules are trapped in channel-like cavi
## Abstract Die Molekülstruktur der Titelverbindungen wurde durch Röntgenstrukturanalyse bestimmt und bis zu einem __R__‐Wert von 0.046 bzw. 0.064 verfeinert. Im Kohlenwasserstoff **1** sind die beiden planaren Fluorensysteme um 81° gegeneinander verdrillt. In der Lithiumverbindung **2** bilden die