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5-Chloro-3,6-dimethyl-1-phenyl-1H,4H-pyrano[2,3-c]pyrazol-4-one

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Author(s): Abdullah M. Asiri | Hassan M. Faidallah | Khalid A. Alamry | Seik Weng Ng | Edward R. T. Tiekink

Journal: Acta Crystallographica Section E
ISSN 1600-5368

Volume: 68;
Issue: 7;
Start page: o2257;
Date: 2012;
Original page

ABSTRACT
In the title compound, C14H11ClN2O2, two independent molecules (A and B) comprise the asymmetric unit with the main difference between them being the relative orientation of the pendent phenyl ring with respect to the fused-ring system [dihedral angles = 8.32 (8)° (A) and 28.32 (8)° (B)]. In the crystal, the A molecules are connected into a linear supramolecular chain along the a axis via C—H...O interactions and linked to this via C—H...Cl interactions are the B molecules. The chains are connected into layers in the ab plane by π–π interactions between pyrazole (A) and pyran (B) rings, and between pyrazole (B) and pyran (A) rings [centroid–centroid distances = 3.5442 (11) and 3.4022 (10) Å, respectively].

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