Oxalato- and squarato-bridged threedimensional networks: The crystal structures of La-2(C2O4)(C4O4)(2)(H2O)(8) center dot 2.5 H2O and K[Bi(C2O4)(2)] center dot 5 H2O [German]

摘要

The title compounds have been formed by hydrolysis of amino- and thioderivatives of squaric acid in the presence of La-III and Bi-III ions. Both compounds are three-dimensional coordination polymers in the solid state, as shown by single crystal X-ray crystallography, In La-2(C2O4)(C4O4)(2)(H2O)(8) . 2.5 H2O oxalato-bridged pairs of LaO9 polyhedra are connected with identical neighbouring polyhedra by squarate ions. In K[Bi(C2O4)(2)] . 5H(2)O each Bi atom is fourfold linked to other Bi atoms by the oxalate ions. The resulting 3D network shows a diamond-like topology with square-shaped channels. In both structures the channels are partially filled by water molecules. [References: 29]