6-(4-Aminophenyl)-2-ethoxy-4-(2-thienyl)nicotinonitrile

作者：Fun Hoong Kun^*; Chantrapromma Suchada; Kobkeatthawin Thawanrat; Padaki Mahesh; Isloor Arun M

来源：Acta Crystallographica Section E-Structure Reports Online, 2010, 66: O1811-U661.

DOI：10.1107/S160053681002369X

In the title nicotinonitrile derivative, C(18)H(15)N(3)OS, the central pyridyl ring makes dihedral angles of 25.22 (10) and 24.80 (16)degrees 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)degrees]. In the crystal structure, molecules are linked by N-H center dot center dot center dot N hydrogen bonds into chains along [010]. These chains are stacked along the a axis. C-H center dot center dot center dot pi weak interactions involving the thiophene ring are observed.