6-Amino-5-(1-amino-2,2-dicyanovinyl)-3,3a,4,5-tetrahydro-2H-indene-4-spi ro-1 `-cyclopentane-3a,7-dicarbonitrilethiophene-2-carbaldehyde(1/0.5)

Asiri, A.M. and Ng, S.W. (2010) 6-Amino-5-(1-amino-2,2-dicyanovinyl)-3,3a,4,5-tetrahydro-2H-indene-4-spi ro-1 `-cyclopentane-3a,7-dicarbonitrilethiophene-2-carbaldehyde(1/0.5). Acta Crystallographica Section E: Structure Reports Online, 66 (10). O2484-U1700. ISSN 1600-5368,

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In each of the two independent indene-4-spiropentane molecules in the asymmetric unit of the title 2:1 adduct, C(19)H(18)N(6)center dot 0.5C(5)H(4)OS, the cyclohexene ring adopts a half-chair conformation and the cyclopentene and cyclopentane rings adopt envelope conformations. The mean plane through the cyclohexene/cyclopentene fused system is aligned at a dihedral angle of 77.9 (1)degrees with respect to the mean plane through the cyclopentane ring in one molecule and 87.0 (1)degrees in the other. In the crystal, adjacent indene-4-spiropentane molecules are linked by N-H center dot center dot center dot N hydrogen bonds into a three-dimensional network. The spaces within the network are occupied by the thiophene-2-carbaldehyde molecules. The thiophene-2-carbaldehyde unit is disordered over two positions of equal occupancy. The crystal studied was found to be a non-morohedral twin with two minor twin components of 18.4 and 9.7%.

Item Type: Article
Subjects: Q Science > Q Science (General)
Depositing User: Mr Faizal 2
Date Deposited: 19 Jan 2015 03:42
Last Modified: 31 Jan 2019 01:12
URI: http://eprints.um.edu.my/id/eprint/12214

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