Process for the synthesis of organomagnesium compounds using catalysts

A process for the preparation of a Grignard compound, said process comprising reacting an organic halide and magnesium metal in a solvent in the presence of a transition metal catalyst and an additional catalyst component, said transition metal catalyst comprising a transition metal selected from Periodic Table groups 3, 4, 5, 6, 7, 8, 9, 10 or 11, and one or more elements selected from groups 14, 15, 16 or 17 bonded to said transition metal, and said additional catalyst component comprising a compound of a metal of Periodic Table groups 1, 2 or 13, and one or more elements of Periodic Table groups 14, 15, 16 or 17 or hydrogen bonded to said metal of Periodic Table groups 1, 2 or 13.