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Title2-(3-Cyano-4-{3-[1-(2-hydroxyethyl)-3,3-dimethyl-1,3-dihydroindol-2- ylidene]prop-2-enyl}-5,5-dimethyl-5H-furan-2-ylidene)malononitrile
Publication TypeJournal Article
Year of Publication2014
AuthorsGainsford, G.J., Bhuiyan M.D.H., and Kay A.J.
JournalActa Crystallographica Section E: Structure Reports Online
Paginationo45 - o46
Date Published2014
ISSN16005368 (ISSN)
AbstractThe title compound, C25H24N4O2, adopts a cisoid configuration and has twofold orientational disorder of the 2-hydroxyethyl group. The molecule is twisted from planarity so that the dihedral angle between the terminating indol-2-ylidene and the furan-2-ylidene moiety mean planes is 12.75(7)°. Conformational disorder occurs at the indol-2-ylidene N atom, which results in two orientations for the hydroxyethyl group [occupancy ratio = 0.896(2):0.104(2)], and the hydroxy O atom of the 2-hydroxyethyl group is located over three sites [occupancy ratio = 0.548(2):0.348(2):0.104(2)]. An intramolecular C-H.O hydrogen bond involving the lowest occupancy hydroxy O atom is observed. In the crystal, the molecules pack in parallel dimeric sheets about centres of symmetry, utilizing O-H⋯N(cyano), C-H.N(cyano) and O-H.O hydrogen bonds, in two sets parallel to (02-1) and (021̄) planes.

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