Formation of an Infinite Three-Dimensional Water Network by the Hierarchic Assembly of Bilayer Water Nanotubes of Octamers

A novel three-dimensional water network containing both coordinated and lattice water molecules was obtained in the compound [Co 2 (BPTC)(H 2 O) 6 ] n ·11 n H 2 O ( 1 ). The water network was formed by the hierarchic assembly of bilayer water nanotubes of octamers with crisscross pentamers and helical water chains. A startling feature is the large (H 2 O) 36 water crowns in the water layer in the [001] plane. Leaving the water molecules from the coordination spheres out of consideration, the water network is a two-dimensional water layer formed by T5(2)5(3) water tapes.