Water clusters in organic molecular crystals

Abstract

The patterns of water clusters within the Cambridge Structural Database have been classified as discrete rings and chains, infinite chains and tapes, and layer structures. Predominant patterns are found for discrete clusters as 4-membered water rings, and in chains with a repeat unit of 4 waters. In tapes dominant patterns consist of linked 5-membered rings sharing one edge, and alternate 4,6-membered rings sharing one edge. If donor/acceptor groups are included from the organic molecules then the discrete water patterns transform into the dominant tape motifs.