It has been shown that the formation of RM compounds can be accelerated photochemically and by the use of varying quantities of selected reagents. Also, the rates of reaction between RM compounds and various reactants can be accelerated by small quantities of catalysts like cuprous chloride. For example, the time required for complete interaction of benzonitrile and phenylmagnesium bromide is reduced significantly by the addition of small amounts of compounds like cuprous chloride. It appears that these particular catalysts function by first forming very unstable organometallic compounds like phenylcopper, in the case mentioned. Then the phenylcopper decomposes to give copper and diphenyl, probably via free phenyl radicals which then set up chain reactions.
Proceedings of the Iowa Academy of Science
©1936 Iowa Academy of Science, Inc.
Lichtenwalter, M.; Bailie, J. C.; and Carter, A. J.
"Effects of Catalysts on the Preparation and Properties of Organometallic Compounds,"
Proceedings of the Iowa Academy of Science, 43(1), 205-205.
Available at: https://scholarworks.uni.edu/pias/vol43/iss1/49