[Hydroxy(aryl)methylene]diphosphonic acids, a class of drugs in bone pathology treatments, crystallize as head-to-head dimers
作者:Marc Lecouvey、Carole Barbey、Alda Navaza、Alain Neuman、Thierry Prangé
DOI:10.1107/s0108270102012386
日期:2002.8.15
Two [hydroxy(aryl)methylene]diphosphonic acids have been crystallized as dimers. The first compound, [hydroxy(phenyl)methylene]diphosphonic acid monohydrate, C7H10O7P2.H2O, crystallizes in the non-centrosymmetric space group P2(1), with the two enantiomers related by a non-crystallographic centre of inversion, while the second compound, [hydroxy(4-nitrophenyl)methylene]diphosphonic acid tetrahydrofuran disolvate, C7H9NO9P2.2C(4)H(8)O, crystallizes in the centrosymmetric space group P2(1)/c and uses the centre of symmetry to form the same dimer.