The structure of the grignard reagent. IX. The crystal structure of the dimeric ethylmagnesium bromide/diisopropyl ether complex

Abstract

The structure of the dimeric ethylmagnesium bromide/diisopropyl ether complex [C2H5MgBr - O(i-C3H7)2]2 was studied with s ingle crystal X-ray diffraction techniques. Crystals are monoclinic with spacegroup P21/n and two dimers per unit cell of dimensions a 7.85(1), b 14.43(2), c 11,31(2) °A, β 100.3(1)o The structure was refined to a final R-value of 0.073. The magnesium is four coordinate; dimers are formed through bridging bromine atoms. p]This result is briefly discussed in the context of factors governing complex formation of Grignard reagents.