Abstract
The key point of advanced crystal engineering is how to control the non-covalent interaction and then synthesizing the new material which contains the physical and chemical properties which we expect. In the past, people have had known much about constructing covalent bond already. Based on this knowledge we can make covalent building blocks first, and then manufacturing the supramolecule by self-assembling all the covalent building blocks. In order to make them up correctly people should manipulate intermolecular weak forces very well. Hydrogen bonding and interaction are two of important intermolecular weak interactions and also the reasons why the molecules pack to each other. By these two ways, their structure packing dimensions could be extended higher and their physical and chemical properties would also be changed.In this thesis we focused on the molecular structures and their crystal packing in order to understand much about the covalent strong and non-covalent weak interactions. We discussed not only classical but also non-classical hydrogen bonding. In structure 5, we show one of the crystal packing dimension is by non-classical hydrogen bond. Although the structure 1 wouldn’t extend their packing dimension by this kind of weak hydrogen bonding, that weak hydrogen bonding also played the important rule to hold the main molecule and solvent molecule together. In structures 6, 7 and 8, classical hydrogen bond was discussed and three dimensional crystal packing was also shown. Another important intermolecular interaction is interaction. We touch upon two kinds of these weak attractive forces, one is offset-face-to-face mode another is edge-to-face mode. Usually these kinds of packing energy are weaker than hydrogen bonding, the interaction distance is below 4 A. Only structure 2 and 8 doesn’t contain these interactions, the others at least extend packing dimensions by these kinds of weak interactions. Besides we also find special packing interactions in structure 7. Dipolar layers are formed by the dipole moment of . This kind of interaction makes two 2D supramolecular networks get closed to 2.8A and forms 3D supramolecule.All the X-ray diffraction data were collected by Siemens SMART CCD Single Crystal Diffractometer which produces 0.71073A wavelength. The structures were solved and refined by SHELX97 program, using direct method and checked by Patterson synthesis to solve initial phase. The crystal packing was checked by PLU, PLATON, ORTEP32 programs. I hope my research work of master degree during the last two years can have people known much about the supramolecular structures and their intermolecular weak interactions. I also wish people would touch the secret of nature in the near future.