“…Noble metals are rare and used in av ariety of key technologies,s uch as catalysis.T he replacement of noble metals by earth-abundant transition metals,such as Mn, Fe,or Co,i sapossible strategy to reduce the use of noble metals, especially in homogeneous catalysis,where reusability of the active metal is challenging.The use of earth-abundant metals may also permit the discovery of new selectivity patterns in known reactions or the development of novel catalytic transformations.M anganese complexes have been used successfully in hydrogenation and dehydrogenation catalysis since early 2016. [1] Despite significant progress in the (transfer) hydrogenation of ketones, [2] esters, [3] amides, [4] and CO 2 , [5] as well as in dehydrogenative couplings, [6] dehydrogenative condensations, [7] and borrowing hydrogen/hydrogen autotransfer, [8] only few examples of novel catalytic transformations that have not yet been observed with other transition metals have been reported. [9] Olefins are highly important compounds as they are broadly used as starting materials for the synthesis of fine and bulk chemicals.…”