Crystal structure of the 1 : 1 : 6 complex between 18-crown-6, hydroquinone and water |
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Authors: | Bachir Belamri Claude Bavoux Alain Thozet |
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Affiliation: | (1) Laboratoire de Minéralogie-Cristallographie, Associé au CNRS (UA 805), Université Claude Bernard Lyon I, 27-43, boulevard du 11 novembre 1918, 69622 Villeurbanne, France |
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Abstract: | Hydroquinone forms a 1 : 1 : 6 complex with 18-crown-6 and water. Crystals of this complex are monoclinic, space groupP21/a witha = 14.289(1),b = 7.972(1),c = 11.596(1) Å, = 97.72(1)°,Z = 2,Dc = 1.22 g cm–3. The hydroquinone and crown ether molecules lie on centres of symmetry with the crown in theD3d conformation. The water molecules act as a bridge between hydroquinone and the crown ether. The structure consists of molecules linked by a 3-dimensional network of hydrogen bonds: the hydroquinone and two water molecules lie roughly in the (001) plane; the crown ether and four water molecules form bipyramidal structures which are stacked in layers alternating with the previous planes. |
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Keywords: | crown ether hydroquinone complexation crystal structures hydrogen bonding |
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