Moon D, Choi JH. Crystal structure of 3,14-diethyl-2,6,13,17-tetra-azoniatri-cyclo-[16.4.0.0
7,12]docosane tetra-chloride tetra-hydrate from synchrotron X-ray data.
Acta Crystallogr E Crystallogr Commun 2021;
77:213-216. [PMID:
33614157 PMCID:
PMC7869539 DOI:
10.1107/s2056989021001006]
[Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 01/28/2021] [Indexed: 11/10/2022]
Abstract
The crystal structure of the hydrated title salt, C22H48N4 4+·4Cl-·4H2O (C22H48N4 = H4 L = 3,14-diethyl-2,6,13,17-tetra-azoniatri-cyclo-[16.4.0.07,12]doco-sa-ne), 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 mol-ecules. The macrocyclic ring of the tetra-cation adopts an exodentate (3,4,3,4)-D conformation. The crystal structure is stabilized by inter-molecular hydrogen bonds involving the macrocycle N-H groups and water O-H groups as donors, and the O atoms of the water mol-ecules and chloride anions as acceptors, giving rise to a three-dimensional network.
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