NHC‐Containing Manganese(I) Electrocatalysts for the Two‐Electron Reduction of CO21. Issue 20 (2nd April 2014)

• Record Type: Journal Article
• Authors: Agarwal, Jay; Shaw, Travis W.; Stanton, Charles J.; Majetich, George F.; Bocarsly, Andrew B.; Schaefer, Henry F.
• Is Part Of: Angewandte Chemie international edition. Volume 53:Issue 20(2014)
• Page Start: 5152
• Page End: 5155
• Publication Date: 2014-04-02
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201311099
• Languages: English
• ISSNs: 1433-7851

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The synthesis and characterization of the first catalytic manganese N‐heterocyclic carbene complexes are reported: MnBr(<italic>N</italic>‐methyl‐<italic>N</italic>′‐2‐pyridylbenzimidazol‐2‐ylidine)(CO)₃ and MnBr(<italic>N</italic>‐methyl‐<italic>N</italic>′‐2‐pyridylimidazol‐2‐ylidine)(CO)₃. Both new species mediate the reduction of CO₂ to CO following two‐electron reduction of the Mn^I center, as observed with preparative scale electrolysis and verified with ¹³CO₂. The two‐electron reduction of these species occurs at a single potential, rather than in two sequential steps separated by hundreds of millivolts, as is the case for previously reported MnBr(2, 2′‐bipyridine)(CO)₃. Catalytic current enhancement is observed at voltages similar to MnBr(2, 2′‐bipyridine)(CO)₃.</p> </abstract>