Abstract

AbstractAn X‐ray structural investigation on bis(1,2‐dimethyl‐3‐indolizinyl)methane (1) reveals that it occupies a two‐bladed propeller conformation with an anti‐relation between the central methylene protons and the four methyl groups. In the crystal, the molecule lacks a C2 axis and it is asymmetric rather than helical. Since the two indolizinyl rings carry no substituents which can conjugate with their π systems the structural results supply, for the first time, accurate information about the geometry of the important heterocycle indolizine.

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