Abstract
In the title nicotinonitrile derivative, C18H15N3OS, the central pyridyl ring makes dihedral angles of 25.22 (10) and 24.80 (16)° with the 4-aminophenyl and thiophene rings, respectively. The thiophene ring is disordered over two orientations by rotation around the C(thiophene)—C(pyridine) bond; the occupancies are 0.858 (2) and 0.142 (2). The ethoxy group is slightly twisted from the attached pyridyl ring [C—O—C—C torsion angle = 171.13 (16)°]. In the crystal structure, molecules are linked by N—H⋯N hydrogen bonds into chains along [010]. These chains are stacked along the a axis. C—H⋯π weak interactions involving the thiophene ring are observed.
Highlights
24.80 (16) with the 4-aminophenyl and thiophene rings, respectively
The thiophene ring is disordered over two orientations by rotation around the C(thiophene)—C(pyridine) bond; the occupancies are 0.858 (2) and 0.142 (2)
The ethoxy group is slightly twisted from the attached pyridyl ring
Summary
USM, Penang, Malaysia, bCrystal Materials Research Unit, Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand, and cDepartment of Chemistry, National Institute of Technology–Karnataka, Surathkal, Mangalore 575 025, India Key indicators: single-crystal X-ray study; T = 100 K; mean (C–C) = 0.003 Å; disorder in main residue; R factor = 0.038; wR factor = 0.085; data-to-parameter ratio = 13.1.
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