In conclusion, this work describes the first precedent of olefin transposition catalysed by complexes based on abundant and biocompatible Mn metal. This reactivity furnishes an array of 2-alkenes in good selectivities and yields. Importantly, this activity manifests upon disabling the cooperative function in related Mn catalysts that show activity in carbonyl hydrogenation while being virtually inactive towards olefin conversion. We envision such manipulation on the metal-ligand cooperation modes may present a new design direction for controlling early transition metal catalysts and enabling multiple reactivity trains with minimal ligand modification.