Synthesis and Crystallographic Characterization of an Octameric Water Complex, (H₂O)₈

Water Clusters: Towards an Understanding Based on First Principles of Their Static and Dynamic Properties

“…[30] Another W 8 arrangement has been described in an organocobalt crystal. [31] Here the W 8 configuration corresponds to S i symmetry which, according to theoretical calculations, is 8.4 kJ mol À1 above the D 2d and S 4 configurations.…”

Helix inside a Helix: Encapsulation of Hydrogen‐Bonded Water Molecules in a Staircase Coordination Polymer

“…[2] As hydrogen bonds and other noncovalent interactions are the main driving forces behind this self-assembly process, supramolecular chemistry is now in a phase of characterizing and understanding various hydrogen-bonded water clusters in the form of hexamers, [3,4] octamers, [5,6] decamers, [7] (H 2 O) 15 (CH 3 OH) 3 clusters [8] and one-dimensional (1D) infinite water chains [9,10] in diverse environments of various crystal hosts. Zeolite-like 3D network structures with chiral channels filled with highly ordered water molecules are well known.…”

“…[17] However, the structure of 1 has a hydrogenbonded helix inside a helical 1D coordination polymer. This highly ordered helical stream of water molecules inside another helical polymer is striking and is a unique structural feature among existing porous helical structures [2c, 18-20] and other patterns of water structures observed in diverse environments of inorganic [5,7] and organic hosts [3,4,9] and 2D supramolecular (H 2 O) 12 rings. [21] Whereas designing chiral materials from achiral molecular compounds is a promising theme in materials science, using simple and available chiral precursors as an alternative is another practical approach.…”

Novel water clusters in the crystalline state: structures of a symmetrical, cyclic hexamer and an ‘opened-cube’ octamer

“…8 An octameric cluster with a cubic arrangement of oxygen atoms has also been reported in a solid-state hydrate, but in this case the hydrogen atoms were not located. 12 Very recently, a cyclic (H 2 O) 8 cluster that closely resembles a portion of the ice I c structure has been found in an organic supramolecular complex. 14 We have now found a new type of octameric cluster in crystalline [V(phen) 2 4 (phen = 1,10-phenanthroline) 2, (Fig.…”