Effect of Purification on the Semiconduction of Imidazole

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Abstract
The technique of measuring the temperature dependence of the electrical resistance of organic compounds directly in a zone‐refining tube has been explored with imidazole. The temperature dependence, determined as a function of the number of zone‐refining passes, became constant after 39 passes. The results were compared with those of imidazole purified by successive sublimations. The contribution of hydrogen bonding to the semiconduction of imidazole is discussed.