Synthesis and structural investigation of a new cadmium cyclohexaphosphate Cd[3,4-(CH3)2C6H5NH3]4P6O18·6H2O

Single crystals of a new cyclohexaphosphate, are synthesised and investigated by X-ray diffraction. This compound crystallizes in the triclinic system with the space group P-1 and cell parameters a=7.773(4), b=9.238(3), c=18.532(7) Å, α=88.57(3), β=88.10(4), γ=67.35(4)°, Z=1 and V=1227(1) ų. The three-dimensional network is built up from parallel (0 0 1) layers of CdP₆O₁₈(H₂O)₆]⁴⁻ between which the organic molecules are inserted. The Cd atoms, in 1(a) sites, adopt an octahedral coordination. The 3,4-xylidinium cations exercise an electrostatic interaction on the inorganic anion and establish strong H-bonds with their oxygen atoms.