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2-Oxo-4-(thiophen-2-yl)-1,2,5,6-tetrahydrobenzo[h]quinoline-3-carbonitrile

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Author(s): Abdullah M. Asiri | Hassan M. Faidallah | Abdulrahman O. Al-Youbi | Khalid A. Alamry | Seik Weng Ng

Journal: Acta Crystallographica Section E
ISSN 1600-5368

Volume: 67;
Issue: 9;
Start page: o2472;
Date: 2011;
Original page

ABSTRACT
In the molecule of the title compound, C18H12N2OS, the tetrahydrobenzo[h]quinoline fused-ring system is buckled owing to the ethylene –CH2CH2– fragment, the benzene ring and the pyridine ring being twisted by 16.0 (1)°. The 4-substituted aromatic ring is bent away from the pyridine ring by 59.5 (2)° (for the major disordered thienyl component) in order to avoid crowding the cyanide substituent. In the crystal, two molecules are linked by a pair of N—H...O hydrogen bonds to form a centrosymmetric dimer. The thienyl ring is disordered over two sites in a 72.7 (2):27.3 ratio.
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