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Dirubidium aqua­penta­chloro­chromate(III) and dicaesium aqua­penta­chloro­chromate(III)

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Abstract:

The structures of the two novel title compounds, Rb2[CrCl5(H2O)], (I), and Cs2[CrCl5(H2O)], (II), have been determined by single-crystal X-ray diffraction. Compounds (I) and (II) crystallize with Pnma and Cmcm symmetry, respectively. In (I), the Cr, three Cl and water O atom lie on a mirror plane; in (II), the Cs, Cr, O and one of the Cl atoms are at sites with m2m symmetry. The chromate anions are in a pseudo-cubic environment of eight Rb+ cations in (I) and in a pseudo-octahedral environment of six Cs+ cations in (II). The structural arrangement correlates with the ranion/rcation radius ratio.

Document Type: Research Article

DOI: http://dx.doi.org/10.1107/S0108270104002987

Publication date: April 1, 2004

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