Phase Transitions In Bicyclic Compounds
- 1 February 1984
- journal article
- research article
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 104 (1-2) , 95-109
- https://doi.org/10.1080/00268948408070401
Abstract
The study of a wide variety of organic structures by differential scanning calorimetry reveals that bicyclic caged compounds frequently possess a pre-melting phase transition. These compounds are characterized by low entropies of fusion (less than 21 j/K, mole) and relatively large entropies of transition. Derivative structures have been investigated and it has been found that substituents such as the anhydride, nitrile, and carbonyl groups retain the polymorphic phase properties of the parent ring systems while groups such as the imide, methylimide, and carboxylic acid exclude the appearance of a disordered solid phase. The phase properties of chloro and hydroxyl derivatives investigated are more varied and depend on the position of these groups on the ring. The variety of compounds studied shows that hysteresis is a common occurrence in all of these ring systems.Keywords
This publication has 23 references indexed in Scilit:
- Order–disorder phenomena. Part 2.—Order–disorder phase equilibria inD- andL-systems of camphor and related compoundsJournal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics, 1979
- Potential energy calculations of the rotational barriers of molecular solids. II. The dynamic structures of adamantane and hexamethylenetetramine in the solid state and the nature of the phase transition in adamantaneCanadian Journal of Chemistry, 1976
- The solid state vibrational spectra of s‐triazine and s‐triazine‐d3 and the monoclinic to rhombohedral phase transitionJournal of Raman Spectroscopy, 1975
- Improved synthesis of pentacyclo[5.4.0.02,6.03,10.05,9]undecaneThe Journal of Organic Chemistry, 1974
- The Dielectric Relaxation of Dibromodichloromethane, Succinonitrile and Several Camphor Derivatives in the Solid StateJournal of the American Chemical Society, 1962
- The β-Sulfoacrylic Acids: Configuration and Diels-Alder ReactionsJournal of the American Chemical Society, 1962
- Parallel Amide Groups1Journal of the American Chemical Society, 1960
- Synthesis of Some Conjugated Cyclobutane Polyolefins and their 1,2-Cycloaddition to Tetracyanoethylene1,2Journal of the American Chemical Society, 1959
- Chloromaleic Anhydride in the Diene SynthesisJournal of the American Chemical Society, 1945
- Synthesen in der hydroaromatischen ReiheEuropean Journal of Organic Chemistry, 1928