Synthesis and crystal structure of bis (2-phenylethylammonium) dihydrogendimphosphate, [C6H5(CH2)(2)NH3](2)H2P2O7

Chemical preparation, crystal structure and infrared absorption spectra are given for a new organic cation dihydrogendiphosphate. The new synthesized compound [C6H5(CH2)(2)NH3](2)H2P2O7, crystallized in the monoclinic system (P2(1)/c space group) with Z = 4 and with the following unit-cell dimension s: a = 19.006(3), b = 10.718(2), c = 10.996(3) Angstrom and beta = 98.99(2) degrees. Its crystal structure was determined and refined down to R = 0,056 by using 3278 independent reflections. As in all atomic arrangements inclu ding acidic diphosphate groups, we can observe the formation of an infinite network of anions connected by strong H-bonds.