Bench-Stable Dinuclear Mn(I) Catalysts in E-Selective Alkyne Semihydrogenation: A Mechanistic Investigation.

ABSTRACT: Dinuclear manganese hydride complexes of the form [Mn₂ (CO)₈ (μ-H)(μ-PR₂ )] (R=Ph, 1; R=iPr, 2) were used in E-selective alkyne semi-hydrogenation (E-SASH) catalysis. Catalyst speciation studies revealed rich coordination chemistry and the complexes thus formed were isolated and in turn tested as catalysts; the results underscore the importance of dinuclearity in engendering the observed E-selectivity and provide insights into the nature of the active catalyst. The insertion product obtained from treating 2 with (cyclopropylethynyl)benzene contains a cis-alkenyl bridging ligand with the cyclopropyl ring being intact. Treatment of this complex with H₂ affords exclusively trans-(2-cyclopropylvinyl)benzene. These results, in addition to other contro

SUBMITTER: Abhyankar PC 

PROVIDER: S-EPMC9509449 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature