Bis[3-(trimethyl­silyl)prop­yl] ethyl­enebisphospho­nate, H₂DTMSP[EBP]

The title compound (H₂DTMSP[EBP]), C₁₄H₃₆O₆P₂Si₂, was crystallized by the slow evaporation of a solution in a 20:1 mixture of pentane and acetone. The H₂DTMSP[EBP] mole­cule lies about an inversion center. In the solid state, the mol­ecule exists in an anti configuration, with the mol­ecular backbone C-C bond located on an inversion center. The compound exists in the solid state as hydrogen-bonded infinite sheets in the ab plane, unlike the methyl­ene analogue, which exists as hydrogen-bonded infinite chains, demonstrating an `even-odd' effect of the length of the backbone alkyl chain.