JOURNAL of the Tunisian Chemical Society

Chemical preparation, structural, thermal behavior and IR studies are reported for a new monoclinic organic cyclotetraphosphate, [NH₃(CH₂)₅NH₃]₂P₄O₁₂. 2H₂O, having the following parameters : a = 8.471(1) Å, b = 15.958(2) Å. c = 9.175(2) Å, β = 108.29(2)°, V = 1177.6(3) ų, ρ_cal. = 1.58 g/cm³, ρ_mes. = 1.57 g/cm³, P2₁/c, Z = 2. Atomic arrangement of 1,5-diammonium pentane cyclotetraphosphate dihydrate is described by a three dimensional network. The P₄O₁₂ anion having a C_i local symmetry, is surrounded by ten organic groups and four water molecules. Organic cation environment is made by five P₄O₁₂ groups and one water molecule. Thermal behavior exhibits the presence of two water molecules. IR bands are attributed by comparison with spectra of similar other compounds.

I. Aoun, M. Bdiri, A. Jouini

Cyclotetraphosphates, crystal structure, thermal behavior, 1R spectroscopy

Pages 1685-1695