Structural and Physicochemical Studies of [2,3-(CH3)2C6H3NH3]4HP3O10.2H2O.

Physicochemical properties of a new organic cation triphosphate, [2,3-(CH3)2C6H3 NH3]4HP3O10.2H2O, are discussed on the basis of X-ray crystal structure investigation. This compound crystallizes in a triclinic unit cell P1 with the parameters: a = 11.963(6) Å, b = 9.858(6) Å, c = 16.205(7) Å, α = 95.50(4)°, β = 95.21(4)°, γ = 89.07(4)°, V = 1894.4(16) Å3, Z = 2, and Dx = 1.365 g.cm- 3. Crystal structure has been solved and refined to R = 0.074 using 3766 independent reflections. In this atomic arrangement, layers built by HP3O104 - groups are developed in (a, b) planes at z = 1/2. Between these layers the 2,3-dimethylphenylammonium entities are located, which form hydrogen bonds with some external atoms of the phosphoric groups. A characterization of this compound by solid-state 13C and 31P MAS NMR, IR spectroscopy and thermal analysis is also reported. [ABSTRACT FROM AUTHOR]