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

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Summary

Isloorc a

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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