Acta Crystallographica Section E

Structure Reports Online

Volume 70, Part 5 (May 2014)


organic compounds



tk5305 scheme

Acta Cryst. (2014). E70, o547    [ doi:10.1107/S1600536814007788 ]

6-Chloro-8-nitro-4-oxo-4H-chromene-3-carbaldehyde

Y. Ishikawa

Abstract: In the title compound, C10H4ClNO5, the non-H atoms of the 6-chloro­chromone unit are coplanar (r.m.s. deviation = 0.017 Å) with the largest deviation from the mean plane [0.031 (2) Å] being found for the C=O C atom. The nitro group (NO2) is inclined to the chromone unit mean plane by 13.3 (2) °. The formyl group is also twisted with respect to the attached ring [C-C-C-O torsion angles = 10.8 (4) and -171.8 (2)°]. In the crystal, mol­ecules are linked via C-H...O hydrogen bonds forming slab-like networks lying parallel to (-301). The slabs are linked by [pi]-[pi] inter­actions involving the benzene rings of the chromone units [centroid-centroid distance = 3.770 (3) Å].

CCDC reference: 996005


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