Poly[[diaqua(mu3-2,2-dimethylmalonato)cadmium(II)] tetrahydrate].
In the title complex, {[Cd(C(5)H(6)O(4))(H(2)O)(2)].4H(2)O}(n), the dimethylmalonate-cadmium metal-organic framework co-exists with an extended structure of water molecules, which resembles a sodalite-type framework. In the asymmetric unit, there are five independent solvent water molecules, two of which are in special positions. The Cd atoms are eight-coordinated in a distorted square-antiprismatic geometry by six O atoms of three different dimethylmalonate groups and by two water molecules, and form a two-dimensional honeycomb layer parallel to the bc plane. Two such layers sandwich the hydrogen-bonded water layer, which has a sodalite-type structure with truncated sodalite units composed of coordinated and solvent water molecules. This work is the first example of a dimethylmalonate cadmium complex containing truncated sodalite-type water clusters.
Guo
Ming Lin
ML
School of Materials and Chemical Engineering and Key Laboratory of Hollow Fiber Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300160, People's Republic of China. guomlin@yahoo.com
Guo
Chen Hu
CH