Acta Crystallographica Section C

Crystal Structure Communications

Volume 69, Part 9 (September 2013)

organic compounds

Acta Cryst. (2013). C69, 1081-1084    [ doi:10.1107/S0108270113020908 ]

3,3'-[(1RS,3SR)-2-Oxocyclohexane-1,3-di­yl]bis­[(3RS,3'SR)-3-hy­droxy­indolin-2-one] dihydrate: organic layers of R22(8), R22(16) and R66(40) rings linked by tetra­meric water aggregates

D. Becerra, B. Insuasty, J. Cobo and C. Glidewell

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 R22(8), R22(16) and R66(40) rings. These sheets are linked into a continuous three-dimensional framework structure by cyclic centrosymmetric R42(8) water tetra­mers. Comparisons are made with some simpler analogues.

Formula: C22H20N2O5·2H2O

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

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[ doi:10.1107/S0108270113020908/yf3044Isup3.cml ]
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