CHAINS, PLANES AND FRAMES - HOW THE DIMENSIONALITY OF HYDROGEN BONDED OR COORDINATION POLYMER NETWORKS INFLUENCES CRYSTAL MORPHOLOGY Michael J. Zaworotko, Donald C. MacQuarrie, Pierre Losier and C.V.K. Sharma, Department of Chemistry, Saint Marys University, Halifax, Nova Scotia, B3H 3C3, Canada.

Recent work in our group has concentrated upon the development of strategies for controlling the dimensionality of network structures in the solid state. As such, we have characterized numerous examples of 3-D (diamondoid,¹ octahedral²), 2-D (honeycomb grid, square grid) and 1-D (strand) networks. The chemical nature of the compounds that we have investigated is diverse and encompasses hydrogen bonded cocrystals, organic salts and coordination polymers. It has become clear that judicious choice of molecular modules for their symmetry (linear, trigonal, tetrahedral or octahedral) and functionality (complementarity of hydrogen bonding, (-( stacking or metal/ligand coordinate bonding sites) at the molecular level can afford a high degree of control over the nature of the crystal packing, i.e. many of the crystals we have investigated can be regarded as de facto manifestations of supramolecular chemistry.

The presentation will concentrate upon an overview of how the symmetry and dimensionality of the hydrogen bonded or coordination polymer frameworks correlates with space group and crystal morphology.

¹ M.J. Zaworotko, Chem. Soc. Rev., 283 (1994)

² S. Subramanian and M.J. Zaworotko, Angew. Chem. Int. Ed. Engl., 34, 2127 (1995).