The asymmetric unit of the title compound, C19H12ClN3O, contains two mol-ecules with similar conformations. The 14 non-H atoms comprising the 4H-chromeno[8,7-b]pyridine residue are essentially coplanar (r.m.s. deviations = 0.037 and 0.042 Å for the two mol-ecules) and the main difference between them is seen in the twist about the bond linking the main residue to the attached chloro-benzene rings [dihedral angles = 79.01 (12) and 76.22 (11)° for the two mol-ecules]. Zigzag supra-molecular chains along the a-axis direction mediated by amino-pyridine N-H⋯N hydrogen bonds feature in the crystal packing; these are connected into a three-dimensional architecture by C-H⋯π inter-actions and Cl⋯Cl contacts [Cl⋯Cl = 3.3896 (14) Å].
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3629505 | PMC |
http://dx.doi.org/10.1107/S1600536813005217 | DOI Listing |
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