Acta Cryst. (2007). E63, o4148 [ doi:10.1107/S1600536807045576 ]
Abstract: In the title compound, C23H22BrO6P, the -valerolactone ring adopts a distorted screw-boat conformation, with the diethoxyphosphoryl substituent occupying an axial position. An unusual eclipsed conformation is found for the P-C bond. The molecules form centrosymmetric dimers connected by O-HO hydrogen bonds. One of the methyl groups is disordered, with site occupancies of ca 0.8:0.2.
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