title: Dirubidium aquapentachlorochromate(III) and dicaesium aquapentachlorochromate(III).
abstract: The structures of the two novel title compounds, Rb(2)[CrCl(5)(H(2)O)], (I), and Cs(2)[CrCl(5)(H(2)O)], (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 r(anion)/r(cation) radius ratio.
authors.affiliation: Department of Inorganic Chemistry, Göteborg University, SE-41296 Göteborg, Sweden. anneka@chem.gu.se
authors.forename: Annika K
authors.initials: AK
authors.lastname: Eriksson
authors.forename: Barbara M
authors.initials: BM
authors.lastname: Casari
authors.forename: Vratislav
authors.initials: V
authors.lastname: Langer