Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 1 (January 2013)


organic compounds



tk5178 scheme

Acta Cryst. (2013). E69, o67-o68    [ doi:10.1107/S1600536812049835 ]

1-[4-({4-[(E)-(2-Hydroxynaphthalen-1-yl)methylideneamino]phenyl}sulfanyl)phenyl]ethanone

R. Hebbachi, H. Mousser and A. Mousser

Abstract: The title Schiff base compound, C25H19NO2S, crystallizes in a statistically disordered structure comprising keto and enol tautomeric forms. In the enol form, the benzenoid arrangment is promoted by a strong intramolecular O-H...N hydrogen bond and adopts an E conformation about the imine bond. In the keto form there is an intramolecular N-H...O hydrogen bond. In the crystal, an extended network of C-H...O hydrogen bonds stabilizes columns parallel to the c axis, forming large voids (there are four cavities of 108 Å3 per unit cell) with highly disordered residual electron density. The SQUEEZE procedure in PLATON [Spek (2009). Acta Cryst. D65, 148-155] was used to eliminate the contribution of this electron density from the intensity data, and the solvent-free model was employed for the final refinement. The contribution of this undetermined solvent was ignored in the calculation of the unit-cell characteristics.


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