Crystal structure of 3,14-di­ethyl-2,6,13,17-tetra­azoniatri­cyclo­[16.4.0.07,12]do­cosane tetra­chloride tetra­hydrate from synchrotron X-ray data

The crystal structure of the hydrated title salt, C22H48N44+·4Cl−·4H2O (C22H48N4 = H4L = 3,14-diethyl-2,6,13,17-tetra­azoniatri­cyclo­[16.4.0.07,12]doco­sa­ne), has been determined using synchrotron radiation at 220 K. The structure determination reveals that protonation has occurred at all four amine N atoms. The asymmetric unit comprises one half of the macrocyclic cation (completed by crystallographic inversion symmetry), two chloride anions and two water mol­ecules. The macrocyclic ring of the tetra­cation adopts an exodentate (3,4,3,4)-D conformation. The crystal structure is stabilized by inter­molecular hydrogen bonds involving the macrocycle N—H groups and water O—H groups as donors, and the O atoms of the water mol­ecules and chloride anions as acceptors, giving rise to a three-dimensional network.