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8-Methyl-2-oxo-4-(thiophen-2-yl)-1,2,5,6,7,8-hexahydroquinoline-3-carbonitrile

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Author(s): Abdullah M. Asiri | Hassan M. Faidallah | Alaa Anwar Ahmad Saqer | Seik Weng Ng | Edward R. T. Tiekink

Journal: Acta Crystallographica Section E
ISSN 1600-5368

Volume: 68;
Issue: 7;
Start page: o2291;
Date: 2012;
Original page

ABSTRACT
In the title compound, C15H14N2OS, the pyridinone ring in the fused-ring system is nearly planar (r.m.s. deviation = 0.011 Å) and the cyclohexene ring has a twisted half-boat conformation with the methylene C atom adjacent to the methine C atom deviating by 0.592 (7) Å from the plane defined by the remaining five atoms (r.m.s. deviation = 0.108 Å). The thienyl ring is disordered over two almost coplanar positions of opposite orientation in a 0.649 (4):0.351 (4) ratio, and forms dihedral angles of 51.4 (3) (major component) and 54.2 (3)°, respectively, with the pyridinone ring. In the crystal, inversion-related molecules associate via an eight-membered {...HNCO}2 synthon and these are linked into a linear supramolecular chain along the a axis by weak π–π interactions that occur between centrosymmetrically related pyridinone rings [centroid–centroid distance = 3.889 (2) Å].

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