Abstract
Few adduct monophosphates are identified and characterized whereas adduct cyclotetraphosphates remains uninvestigated. Their richness into H-bonds constitutes one of the explanatory factors of their peculiar physicochemical properties. In this article, crystals of a new adduct compound, the 4-Methoxybenzylammonium cyclotetraphosphate monophosphoric acid dihydrate [C 8 H 12 NO] 4 P 4 O 12 (H 3 PO 4 ) 2 .2H 2 O, have been prepared and characterized by X-ray diffraction, thermal behavior, and IR analysis. This compound is triclinic P with the following unit-cell dimensions: a = 8.115(7), b = 9.997(2), c = 15.180(9) Å, α = 94.36(3), β = 104.30(5), γ = 92.73(3)°, V = 1187.0 (1) Å 3 , and Z = 1. Crystal structure has been determined and refined to R = 0.035 using 5219 independent reflexions. This structure can be described as inorganic layers parallel to the ab planes, built up of P 4 O 12 rings, H 3 PO 4 monophosphoric acid and water molecules. Between these layers the 4-methoxybenzylammonium cations are located.
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