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

Abstract

In the title compound, C ₁₄H ₁₁ClN ₂O ₂, 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].