X-Ray Crystallographic Methods in Organic Chemistry--Single Crystal Reactions and Transformations Relevant to Solid-State Chemistry and Semi-Conductors.

摘要

A summary is given of work which included the study and improvement of X-ray diffraction methods for the study of both ordered and disordered organic single crystals over a wide temperature range. A wide variety of single crystal reactions were discovered. The molecular motions within the single crystal matrix are often surprisingly large and in several instances indicate the surprising ability of substituted benzene rings to flip-flop in an ordered manner during the transformations. In general,such motions greatly effect the chemical and physical properties of the solids and no doubt influence the solid state properties of semi-conductors. Principles were developed for the prediction of crystal structures in which only highly specific molecular motions can occur. In this way,undesirable properties arising from such motions could be controlled. Moreover,the control of ordered motions in a solid could allow for the production of otherwise unavailable solid phases exhibiting unusual physical and chemical properties. (Author)