Synthesis and crystal sructure of a new dihydrogenomonophosphate (4-C2H5C6H4NH3)H2PO4

Chemical preparation, crystal structure, calorimetric, and spectroscopic investigations are given for a new organic-cation dihydrogenomonophosphate, (4-C{sub 2}H{sub 5}C{sub 6}H{sub 4}NH{sub 3})H{sub 2}PO{sub 4} in the solid state. This compound crystallizes in the orthorhombic space group Pbca with the following unit cell parameters: a=8.286(3) A, b=9.660(2) A, c=24.876(4) A, Z=8, V=1991.2(7) A{sup 3}, and D{sub X}=1.442 g cm{sup -3}. Crystal structure was solved with a final R=0.054 for 3305 independent reflections. The atomic arrangement coaled described as H{sub 2}PO{sub 4}{sup -} layers between which are located the 4-ethylanilinium cations.