Pyrroles physicochemical properties

Earlier reviews of the chemistry of pyrrole and its derivatives have been concerned mainly with synthesis and reactions.1-5 Discussion of the physicochemical properties has been avoided and only recently 6 has any attempt to redress this neglect been made. 

This review, which covers the literature up to mid-1968, presents the knowledge, which is available to date, concerning the molecular and electronic structure of pyrrole. It also surveys the spectroscopic and nonspectroscopic physical properties of pyrrole and its simple derivatives. During the past 25 years, as a result of developments and improvements in instrument design, the literature on the physicochemical properties of organic compounds has expanded rapidly. Mainly as a result of the instability or nonavailability of many compounds, however, the study of pyrroles has lagged somewhat behind... 

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