Abstract
The title compound, C19H12ClF3O3, obtained by the photochemical transformation of 2-[5-chloro-2-(prop-2-ynyloxy)benzoyl]-3-[4-(trifluoromethyl)phenyl]oxirane adopts a Z conformation with respect to the enolic C=C double bond. The dihedral angle between the benzene rings is 12.25 (16)° and an intramolecular O—H⋯O hydrogen bond closes an S(6) ring. An intramolecular C—H⋯O interaction also leads to an S(6) ring. In the crystal, very weak C—H⋯O interactions and short Cl⋯Cl contacts [3.3221 (16) Å] are seen, as well as weak aromatic π–π stacking interactions [centroid–centroid separation = 3.879 (2) Å].
Highlights
AD wishes to express her gratitude to the University Grant commission (UGC), New Delhi, for financial assistance in the form of a JRF for the accomplishment of this work
Our interest in the catalyst free photochemical organic transformation led us to synthesize the title compound and we report on its crystal structure (Fig. 1)
Hydrogen atoms not involved in hydrogen bonding are omitted for clarity
Summary
The title compound, C19H12ClF3O3, obtained by the photochemical transformation of 2-[5-chloro-2-(prop-2-ynyloxy)benzoyl]-3-[4-(trifluoromethyl)phenyl]oxirane adopts a H atoms treated by a mixture of independent and constrained refinement max = 0.52 e Å3 For background to 1,3-diketones, see: Andrae et al (1997); Crouse et al (1989); Diana et al (1978); Nishiyama et al. (2002); Sheikh et al (2009, 2013); Tchertanov & Mouscadet
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