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. 2013 Sep;69(Pt 9):1081-4.
doi: 10.1107/S0108270113020908. Epub 2013 Aug 21.

3,3'-[(1RS,3SR)-2-oxocyclohexane-1,3-diyl]bis[(3RS,3'SR)-3-hydroxyindolin-2-one] dihydrate: organic layers of R2(2)(8), R2(2)(16) and R6(6)(40) rings linked by tetrameric water aggregates

Diana Becerra  1 , Braulio Insuasty, Justo Cobo, Christopher Glidewell
Affiliations

3,3'-[(1RS,3SR)-2-oxocyclohexane-1,3-diyl]bis[(3RS,3'SR)-3-hydroxyindolin-2-one] dihydrate: organic layers of R2(2)(8), R2(2)(16) and R6(6)(40) rings linked by tetrameric water aggregates

Diana Becerra et al. Acta Crystallogr C. 2013 Sep.

Abstract

The organic component of the title compound, C22H20N2O5·2H2O, exhibits approximate but noncrystallographic mirror symmetry. The molecules of the organic component are linked by a combination of one O-H...O hydrogen bond and two N-H···O hydrogen bonds to form sheets containing R2(2)(8), R2(2)(16) and R6(6)(40) rings. These sheets are linked into a continuous three-dimensional framework structure by cyclic centrosymmetric R4(2)(8) water tetramers. Comparisons are made with some simpler analogues.

Keywords: crystal structure; cyclic water tetramers; hydrogen bonding.

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