Characterization of a new organic-cation cyclotetraphosphate: (1,4-HOC6H4NH3)(4)P4O12 center dot 6H(2)O

The tetra(para-phenolammonium)cyclotetraphosphate hexahydrate, (1,4-HOC6H4N H3)(4)P4O12. 6H(2)O (M = 861.51 g mol(-1)), is monoclinic P2(1)/c with the unit cell parameters a = 9.836(2) Angstrom, b = 8.591(1) Angstrom, 22.769(5 ) Angstrom, beta = 95.41(2)degrees. The structure of this compound can he d escribed as a succession of inorganic and organic sheets parallel to the (0 01) plane, The existence of the ON and NH3 groups in position para to the o rganic cation leads to the cohesion of the inorganic sheets, forming a thre e-dimensional network. The IR spectrum of (1,4-NOC6H4NH3)(4)P4O12. 6H(2)O i s reported and discussed according to the theoretical group analysis, The I R data confirm the atomic arrangement within the structure. The coupled TG- DTA thermal study shows the successive departure of four and two water mole cules, confirming the hydrated character of this cyclophosphate. (C) 1999 A cademic Press.