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Acta Cryst. (2013). C69, 841-846  [ doi:10.1107/S0108270113016788 ]

Dirubidium hexaaquacobalt(II) tetrakis(hydrogen phthalate) tetrahydrate and coordination modes of the hydrogen phthalate anion

D. Poleti and J. Rogan

Synopsis: The Rb+ cation is surrounded by nine O atoms from Hpht- anions and water molecules, with a strongly deformed pentagonal-bipyramidal geometry and one apex split into three positions. The crystal packing is governed by numerous hydrogen bonds involving all water molecules and Hpht- anions.

Formula: Rb2[Co(H2O)6](C8H5O4)4·4H2O

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