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Pseudopolymorphism in hydroxybenzophenones: the dihydrate of 2,2′,4,4′-tetrahydroxybenzophenone

Acta Cryst. (2012). C68, o156-o159 (


To increase our knowledge of polymorphism in molecular compounds and pharmaceuticals we have committed ourselves to studying hydroxybenzophenone derivatives. The paper describes the structure of a dihydrate pseudopolymorph of 2,2′,4,4′-tetrahydroxybenzophenone or bis(2,4-dihydroxyphenyl)methanone, which was compared with the known anhydrous and hydrated forms of other hydroxybenzophenones. The role of water in the crystal assembly was also studied.

I. M. R. Landre, F. T. Martins, J. A. Ellena, M. H. Dos Santos and A. C. Doriguetto