Unusually high redox potentials characterize the MoII complexes trans‐[MoX2L], X = Cl, Br, which have proved to be good precursors for the synthesis of low‐valent Mo complexes containing thioether ligands L. For X = Br, both the chemical (Na/Hg) and electrochemical reduction to give the Mo0 complex 1 were accomplished in high yield under CO atmosphere. L = title compound.