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The asymmetric unit of the title compound, C12H12O5P2, contains four independent molecules, generating two dimers via pairs of intermolecular O-H center dot center dot center dot O hydrogen bonds, forming R-2(2) (8) rings. The two aryl rings of each molecule form dihedral angles of 108.6 (1), 103.2 (1), 12.5 (2) and 8.1 (2)degrees in the four molecules.
Li , Y , Hua , G , Slawin , A M Z & Woollins , J D 2009 , ' Bis(phenylphosphonic) anhydride ' Acta Crystallographica. Section E, Structure reports online , vol 65 , no. 11 , pp. O2647-U2732 . DOI: 10.1107/S1600536809038525
Acta Crystallographica. Section E, Structure reports online
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