Hydrogen-bonded network in biphenyl-4,4'-diphosphonic acid.
The crystal structure of the title compound, C(12)H(12)O(6)P(2), displays two different regions alternating along the a axis: a hydrogen-bonded region encompassing the end-positioned phosphonic acid groups and a hydrophobic region formed by the aromatic spacers. The asymmetric unit contains only half of the biphenyl-4,4'-diphosphonic acid (4,4'-bpdp) molecule, which is symmetric with an inversion centre imposed at the mid-point between the two aromatic rings. The periodic organization of the molecules is controlled by two strong O-H...O interactions between the phosphonic acid sites. Weak C-H...pi interactions are established in the aromatic regions.
Próchniak
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Department of Chemistry, Wrocław University of Technology, 27 Wybrzeze Wyspiańskiego Street, 50-370 Wrocław, Poland.
Zoń
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Daszkiewicz
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M
Pietraszko
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A
Videnova-Adrabińska
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V