P. Voorbergen, C. Blomberg, F. Bickelhaupt
Jul 16, 1972
Citations
0
Influential Citations
15
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Abstract The degrees of association of ethylmagnesium bromide, diethylmagnesium and of a mixture of diethylmagnesium and magnesium bromide in the weakly basic solvent diisopropyl ether have been measured at concentrations up to 0.040 M at 27.7°. It is concluded that: (1), ethylmagnesium bromide is present as a dimer, (2), diethylmagnesium is present in a dimer-tetramer equilibrium with K 1 = 24.9 1/mol, and (3), when magnesium bromide is added to an excess of diethylmagnesium it reacts to form ethylmagnesium bromide. Diethylmagnesium and ethylmagnesium bromide are also in equilibrium with (EtMgBr·Et 2 Mg), with K 3 approximately 2.5.