Abstract
The reaction of cyclopropyl bromide with magnesium in dietyl ether yielded directly, during formation of the Grignard reagent, ∼25-30% cyclopropane. Also formed in the reaction was ∼25% cyclopropylmagnesium bromide. The reaction, when conducted in perdeuterated diethyl ether and in dietyl ether in the presence of the radical trap deuterated dicylcohexylphosphine, showed that the cyclopropane is formed mainly by disproportionation of the cyclopropyl radicals on the magnesium surface (∼85%) abd only a small amount (∼15%) by reaction of a freely diffusing radical' with the solvent
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