Heterobimetallic complexes containing M–C–E linkages (M = transition metal atom; E main group metal) have been postulated as relevant intermediates in cross-coupling reactions. Despite this, structural data for these species are scarce. In this contribution, we explore the coordination of E–C bonds (E Zn, Mg, Al) to Mo atoms dimolybdenum quadruple Mo–Mo bonds. addition, reactivity bis(hydride) ...