Conformational Motion and Disorder in Low and High Molecular Mass Crystals

1. Front Matter

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2. Introduction

   Pages 1-7

3. Thermodynamics of the conformational isomerism

   Pages 7-25

4. Condis crystals of cyclic alkanes, silanes and related compounds

   Pages 26-44

5. Condis crystals of flexible macromolecules

   Pages 44-66

6. Condis crystals and their relation to liquid crystals

   Pages 67-95

7. Condis crystals of stiff macromolecules

   Pages 96-103

8. Conclusion

   Pages 103-104

9. Acknowledgements

   Pages 104-104

10. References

    Pages 104-121

The broad field of conformational motion disorder in crystals is described with particular attention to the separation from the well known mesophases of liquid crystals and plastic crystals. Structure, thermodynamics and motion of a larger number of small and large molecules are discussed. Of special interest are the borderlines between smectic and high viscosity liquid crystals and condis crystals and between plastic crystals and condis crystals as complicated by pseudorotation, jumping between symmetry-related states and hindered rotation. This paper illustrates the wide distribution of conformational disorder in nature. Condis crystals and glasses (Conformational Disorder) can be found in small and large molecule systems made of organic, inorganic and biological compounds. The condis state was newly discovered only four years ago. In this article over 100 examples are discussed as example of the condis state. In many cases the condis state was suggested for the first time. Motion in the Condensed State, Condis Crystals and their Relation to Plastic Crystals, Condis Crystals of Flexible Macromolecules, Condis Crystals and their Relation to Liquid Crystals, Condis Crystals of Stiff Macromolecules.

• crystal
• dynamics
• liquid crystals
• macromolecule
• molecule
• structure
• thermodynamics

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