(E)-4,4,4-Trifluoro-2,3-diphenylbut-2-enal
โ Scribed by Fun, Hoong-Kun ;Ng, Shea-Lin ;Li, Zhe ;Xu, Jian-Hua
- Publisher
- International Union of Crystallography
- Year
- 2007
- Tongue
- English
- Weight
- 954 KB
- Volume
- 63
- Category
- Article
- ISSN
- 1600-5368
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โฆ Synopsis
In the title compound, C 16 H 11 F 3 O, the dihedral angle between the two benzene rings is 4.66 (12) . In the crystal structure, the molecules are interlinked into columns along the b axis by intermolecular C-Hร ร รO interactions and short Oร ร รO contacts [2.525 (8) A ห]. The crystal structure is further stabilized by weak intermolecular C-Hร ร ร interactions. The linkage between the two phenyl rings is disordered over two positions in approximately a 0.6:0.4 ratio.
Related literature
For related literature on values of bond lengths, see: Allen et al. (1987). For a related structure, see: van Alem et al. (2005); Experimental Crystal data
C 16 H 11 F 3 O M r = 276.25 Monoclinic, C2=c a = 29.1818 (8) A b = 5.8972 (2) A c = 17.8356 (6) A = 123.485 (3) V = 2559.92 (17) A ห3 Z = 8 Mo K radiation = 0.12 mm ร1 T = 100.0 (1) K 0.53 ร 0.11 ร 0.08 mm Data collection Bruker SMART APEX II CCD area-detector diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2005) T min = 0.851, T max = 0.991 24392 measured reflections 3611 independent reflections 2817 reflections with I > 2(I) R int = 0.035 Refinement R[F 2 > 2(F 2 )] = 0.074 wR(F 2 ) = 0.199 S = 1.
๐ SIMILAR VOLUMES
## Abstract For Abstract see ChemInform Abstract in Full Text.
An efficient synthesis of the non-proteinogenic amino acid (2R,3S)-4,4,4-trifluoro(OBn)-threonine is described. Starting with commercially available (S)-Garner's aldehyde, the desired amino acid was prepared as its hydrochloride salt in five steps and an overall yield of 33% (59% based on recovered
The molecule of the title compound, C 17 H 13 F 3 O 3 , exists in the enol form and displays a strong intramolecular O-Hร ร รO hydrogen bond. The trifluoromethyl group is disordered over two orientations in an approximate 2:1 ratio. ## Related literature For general background, see: Rowley et al.
Single-crystal X-ray study T = 293 K Mean (C-C) = 0.004 A R factor = 0.052 wR factor = 0.153 Data-to-parameter ratio = 12.3 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.