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. 2013 Sep 21;69(Pt 10):o1574-5.
doi: 10.1107/S1600536813025580. eCollection 2013.

Di-hydro-cyclam dimaleate [H2(cyclam)(maleate)2]

Mbonzi Ombenga Mireille Ninon  1 , Mohammed Fahim, Mohammed Lachkar, José Luis Marco Contelles, Josefina Perles, Brahim El Bali
Affiliations

Di-hydro-cyclam dimaleate [H2(cyclam)(maleate)2]

Mbonzi Ombenga Mireille Ninon et al. Acta Crystallogr Sect E Struct Rep Online. .

Abstract

The asymmetric unit of the title mol-ecular salt [systematic name: 1,4,8,11-tetraazacyclotetradecane-1,8-diium bis(3-carboxy-prop-2-enoate)], C10H26N4 (2+)·2C4H3O4 (-), contains two half-cations (both completed by crystallographic inversion symmetry) and two maleate anions. The cyclam macrocycles adopt trans-III conformations, supported by two intra-molecular N-H⋯O hydrogen bonds. The O-bonded H atom of each maleate ion is disordered over two positions with an occupancy ratio of 0.61 (5):0.39 (5): each one generates an intra-molecular O-H⋯O hydrogen bond. In the crystal, the cations are linked to the anions by N-H⋯O hydrogen bonds, generating [001] chains.

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Figures

Fig. 1.
Fig. 1.
: The molecular structure of the title compound, with hydrogen bonds shown as dashed lines. Anisotropic displacement parameters drawn at the 50% probability level.
Fig. 2.
Fig. 2.
: Inter-molecular H-bonds between cyclam and maleate ion.
Fig. 3.
Fig. 3.
: Projection of the structure in bc-plane, hydrogen bonds as dashed lines.
See this image and copyright information in PMC

References

    1. Bandoli, G., Dolmella, A. & Gatto, S. (1993). J. Crystallogr. Spectrosc. Res. 23, 755–758.
    1. Bosnich, B., Poon, C. K. & Tobe, M. L. (1965). Inorg. Chem. 4, 1102–1108.
    1. Bruker (2005). SADABS, SMART and SAINT Bruker AXS Inc., Madison, Wisconsin, USA.
    1. Dale, J. (1973). Acta Chem. Scand. 27, 1115–1129.
    1. Dale, J. (1976). Top. Stereochem. 9, 199–270.