Sodium Trihydrogen-1,4-Benzenediphosphonate: An Extended Coordination Network

Crystals of sodium trihydrogen-1,4-benzenediphosphonate, Na[H 3 bdp], were prepared from the addition of aqueous sodium hydroxide to an acidified solution of 1,4-benzenediphosphonic acid (H 4 bdp). These were shown by X-ray crystallography to crystallize in the space group P , with cell parameters a = 5.7500(3) Å, b = 7.9180(5) Å, c = 10.4420(6) Å, α = 80.398(3)°, β = 76.844(4)° and γ = 81.389(4)°. The crystal structure revealed that the title compound forms a coordination network in which sodium-phosphonate sheets are pillared by the benzene rings into a three-dimensional structure. Graphical abstract Sodium trihydrogen-1,4-benzenediphosphonate, Na[H 3 bdp], forms a coordination network in which sodium-phosphonate sheets are pillared by the benzene rings into a three-dimensional structure.