Di-μ-bromido-bis­[benz­yl(diethyl ether)magnesium]

The title benzyl Grignard reagent, [Mg₂Br₂(C₇H₇)₂(C₄H₁₀O)₂], was obtained by reaction of benzyl bromide with magnesium in diethyl ether, followed by crystallization from toluene. The asymmetric unit comprises one half-mol­ecule, the structural dimeric unit being generated by inversion symmetry with an Mg...Mg distance of 3.469 (2) Å. The Mg(II) atom exhibits a distorted tetrahedral coordination geometry. The crystal packing is defined by van der Waals inter­actions only.