In the solid state, the title compound, C 25 H 16 Br 2 O 2 , shows significant deviations of the fluorene ring system from planarity. A layered hydrogen-bonded structure is formed that may serve as a model for the solid-state structure of phenol-functionalized polyfluorene.
9-Benzylidene-2,7-dichloro-4-oxiranyl-9H-fluorene
✍ Scribed by Hu, Zhi-Yan ;Rao, Guo-Wu ;Zheng, Ren-Hua
- Publisher
- International Union of Crystallography
- Year
- 2007
- Tongue
- English
- Weight
- 492 KB
- Volume
- 63
- Category
- Article
- ISSN
- 1600-5368
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## Abstract magnified image 4‐Substituted thiosemicarbazides **4a‐c** reacted with (2,4,7‐trinitro‐9__H__‐fluoren‐9‐ylidene)‐propanedinitrile (**2**) in pyridine with admission of air to form spiro[fluorene‐9,3′‐(1,2,4‐triazole)]derivatives **5a‐c** and (4‐substituted thiosemicarbazono)propanedini
The title compound, C 29 H 24 O 2 , has mirror symmetry with the cyclopropane C atoms lying on the mirror plane. The fluorene system is essentially planar and makes dihedral angles of 91.43 (4) and 23.50 (6) with the cyclopropane and substituted benzene rings, respectively.
## Abstract The methylenecyclopropanes 7 and 8, with aryl substituents fixed in a coplanar conformation, show an extraordinary readiness to dimerize with formation of 10 and 11, respectively.