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Ni(I)-Alkyl Complexes Bearing Phenanthroline Ligands: Experimental Evidence for CO2 Insertion at Ni(I) Centers
preprintsubmitted on 20.03.2020, 14:41 and posted on 23.03.2020, 08:18 by Rosie Somerville, Carlota Odena, Marc Obst, Nilay Hazari, Kathrin Hopmann, Ruben Martin
ABSTRACT: Although the catalytic carboxylation of unactivated alkyl electrophiles has reached remarkable levels of sophistication, the intermediacy of (phenanthroline)Ni(I)-alkyl species – complexes proposed in numerous Ni-catalyzed reductive cross-coupling reactions – has been subject to speculation. Herein, we report the synthesis of such elusive (phenanthroline)Ni(I) species and their reactivity with CO2, allowing us to address a long-standing challenge related to metal-catalyzed carboxylation reactions.
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in Journal of the American Chemical Society