Acta Crystallographica Section E (Feb 2013)

2-[(2-Hydroxynaphthalen-1-yl)methylideneamino]-5,6,7,8-tetrahydro-4H-cyclohepta[b]thiophene-3-carbonitrile

  • Abdullah M. Asiri,
  • Muhammad Nadeem Arshad,
  • Tariq R. Sobahi,
  • Ghulam Mustafa

DOI
https://doi.org/10.1107/S160053681300007X
Journal volume & issue
Vol. 69, no. 2
pp. o193 – o193

Abstract

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Two independent molecules, A and B, comprise the asymmetric unit of the title compound, C21H18N2OS, with the difference in the angle of orientation between the naphthalene ring system and the mean plane of the cycloheptyl ring [16.13 (1) in A and 11.48 (5)° in B], being evident. The cycloheptyl ring adopts a distorted chair conformation in each molecule with r.m.s. deviations of 0.2345 (4) (A) and 0.2302 (4) Å (B). Intramolecular O—H...N hydrogen bonding generates planar six-membered S(6) loops with r.m.s. deviations of 0.0099 (1) (A) and 0.0286 (1) Å (B).