A Brief Review on Formation of (H2O)n Clusters in Supramolecular Proton Transfer Compounds and Their Complexes

"Water clusters", group of water molecules held together by hydrogen bonds, have been the subject of a number of intense experimental and theoretical investigations because of their importance in understanding cloud and ice formation, solution chemistry, and a large number of biochemical processes. "Water clusters" can play an important role in the stabilization of supramolecular systems both in solution and in the solid state and there is clearly a need for chemists a better understanding of how such aggregates influence the overall structure of their surroundings. The present brief review deals with (H2O)(n) clusters, identified/observed crystallographically upon 170 crystal structures of synthesized coordination compounds based upon proton transfer compounds by Hossein Aghabozorg's research groups since 2000. The structural details of water clusters, (H2O)(n), n = 2, 3, 4, 5, 6, 7, 8, 9, 15, 16 and infinity are described systematically.