Crystal structure and Hirshfeld surface analysis of 2,2′′′,6,6′′′-tetramethoxy-3,2′:5′,3′′:6′′,3′′′-quaterpyridine

Abstract

In the title compound, C24H22N4O4, the four pyridine rings are tilted slightly with respect to each other. The dihedral angles between the inner and outer pyridine rings are 12.51 (8) and 9.67 (9)°, while that between inner pyridine rings is 20.10 (7)°. Within the molecule, intramolecular C—H...O and C—H...N contacts are observed. In the crystal, adjacent molecules are linked by π–π stacking interactions between pyridine rings and weak C—H...π interactions between a methyl H atom and the centroid of a pyridine ring, forming a two-dimensional layer structure extending parallel to the ac plane. Hirshfeld surface analysis and two-dimensional fingerprint plots indicate that the most important contributions to the crystal packing are from H...H (52.9%) and H...C/C...H (17.3%) contacts.

Keywords

• crystal structure
• quaterpyridine derivative
• π–π interaction
• C—H...π interaction
• Hirshfeld surface analysis