(C5H16N2).[Zn3(HPO3)4].H2O: A new three-dimensional zincophosphite with 12-membered ring channels and infinite edge shared 4-membered ring ladders

Employing 3-dimethylamino-1-propylamine as a template, a new three-dimensional (3-D) zincophosphite (C5H16N2).[Zn3(HPO3)4].H2O has been prepared under hydrothermal conditions and characterized by single-crystal X-ray diffraction (XRD), FTIR, elemental analysis, powder XRD, and thermogravimetric analysis (TGA). The compound crystallizes in the triclinic space group P1-bar , with cell parameters, a=8.9884(2)A, b=10.326(2)A, c=11.917(2)A, α=66.98(3)o, β=89.01(3)o, and γ=78.98(3)o, V=997.2(3)A3 and Z=2. The connectivity of the ZnO4 tetrahedra and HPO3 pseudo pyramids results in inifinite edge-sharing, ladderlike chains of 4-membered rings, which are further linked by Zn-O-P bonds to form a 3-D structure that with interesting 12-membered ring channels along the [100] and [001] directions. The diprotonated amine molecules sit in the middle of the channels along the [100] direction and interact with the framework via hydrogen bonds. There also exist channels with 8-membered ring window along the [100] and [010] directions