Fast Co‐Catalyzed Semihydrogenation of Alkynes with Controlled E/Z‐Selectivity Using Same Catalyst

While several first row transition metal catalysts are known to catalyze alkyne semihydrogenation, the selectivity is commonly controlled by the nature of the specialized catalyst, providing only E or only Z selectivity depending on ligand/metal combination. In this work, we describe E/Z selectivity control using the same pincer cobalt catalyst that allows to obtain either E or Z‐semihydrogenation product with good to excellent selectivity and conversion controlled by reaction conditions.