Disordered crystal structure of 4,7,13,16,21,24-hexaoxa-1,10-diazoniabicyclo[8.8.8]hexacosane dibromide dihydrate

Author： Chekhlov A.  

Publisher： Springer Publishing Company

ISSN： 0022-4766

Source： Journal of Structural Chemistry, Vol.46, Iss.3, 2005-05, pp. : 572-576

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Abstract

The disordered crystal structure of 4,7,13,16,21,24-hexaoxa-1,10-diazoniabicyclo[8.8.8]hexacosane dibromide dihydrate, [H2(2.2.2-Crypt)]2+·2Br−2H2O (I) was studied by X-ray diffraction (XRD) analysis. The orthorhombic structure of I (space group Aba2, a = 21.036(3) Å, b = 14.453(2) Å, c = 8.525(1) Å, Z = 4) was solved by direct methods and refined by full-matrix least squares in anisotropic approximation to R = 0.045 over all 2695 independent (taking into account anomalous scattering) reflections collected (CAD-4 automatic diffractometer, λCuK α).

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