Komplexe mit substituierten 2,5-Dihydroxy-p-benzochinonen: Das isotype Paar BaC6X2O4 · 3 H2O (X = Cl, Br) / Complexes with Substituted 2,5-Dihydroxy-p-benzochinones: The Isotypic Pair BaC6X2O4 · 3 H2O (X = Cl, Br)

Abstract

Abstract BaC6X2O4 · 3H2O (X = Cl, Br) crystallizes in the orthorhombic space group Cmca. 4 of the 8 oxygen atoms around Ba2+ belong to two different dianions, chelating Ba2+. In this way 1-dimensional corrugated chains are formed, interlinked by two oxygen atoms of neighbouring chains, thus forming layers. This interconnection is of polar character within a layer. The in­terlinking oxygen atoms have one carbon- and two Ba2+ neighbours. CN 8 is completed by two water molecules. The latter and a further water molecule situated between the layers may be removed reversibly in a topochemical reaction without destruction of the structure.