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Updated: May 9, 2026

Syntheses, Crystallization, and Spectroscopic Characterization of 3,5-Lutidine N-Oxide Dehydrate
Published on: April 24, 2018
Synthesis, crystal structure and Hirshfeld surface analysis of 2-oxo-N-(pyridin-4-yl)-2H-chromene-3-carboxamide
M Sunithakumari1, M Harish Kumar1, H C Devarajegowda1
1Department of Physics Yuvaraja's College University of Mysore,Mysore-570005 Karnataka India.
Abstract:
In the title compound, C15H10N2O3, the dihedral angle between the heterocyclic 2H-chromene and the pyridine moieties is 2.09 (9)°. The mol-ecule exhibits an almost planar conformation (r.m.s. deviation = 0.048 Å). The torsion angle associated with the amide linkage between the 2H-chromene and pyridine moieties is -179.17 (18)ο and found to be anti-periplanar. In the crystal, C-H⋯O hydrogen bonds form two sets of inversion dimers, generating R 2 2(14) and R 2 2(16) synthons that propagate along the [010] direction. The mol-ecular packing in the crystal is further consolidated by C= O⋯π inter-actions and π-π stacking with centroid-centroid separations of 3.732 (2), 3.815 (2) and 3.947 (2) Å. The two-dimensional fingerprint plots indicate that the major contributions to the crystal packing arise from H⋯O/O⋯H (19.5%), H⋯C/C⋯H (14.1%), H⋯N/N⋯H (8.0%) and O⋯C/C⋯O (5.0%) inter-actions.
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