Bis(3-azoniapentane-1,5-diaminium) cyclo-hexa-phosphate dihydrate: a monoclinic polymorph.
In the title hydrated mol-ecular salt, 2C(4)H(16)N(3) (3+)·P(6)O(18) (6-)·2H(2)O, the complete cyclo-hexa-phosphate anion is generated by crystallographic inversion symmetry. The six P atoms of the P(6)O(18) (6-) anion form a chair conformation and the organic cation has a corrugated linear geometry. In the crystal, the cations and the anions are connected by N-H⋯O hydrogen bonds into slabs propagating in the ac plane. The water mol-ecules link the slabs by accepting N-H⋯O links and forming O-H⋯O links. The triclinic polymorph was reported by Gharbi et al. [(1995). J. Solid State Chem.114, 42-51].
Lamia
L
Khedhiri
Samah
S
Akriche
Salem S
SS
Al-Deyab
Mohamed
M
Rzaigui