Electrochemical C-H bond activation <i>via</i> cationic iridium hydride pincer complexes.

Lindley, Brian M; Walden, Andrew G; Brasacchio, Ann Marie; Casuras, Andrea; Lease, Nicholas; Chen, Chun-Hsing; Goldman, Alan S; Miller, Alexander J M

Electrochemical C-H bond activation via cationic iridium hydride pincer complexes.

Lindley, Brian M; Walden, Andrew G; Brasacchio, Ann Marie; Casuras, Andrea; Lease, Nicholas; Chen, Chun-Hsing; Goldman, Alan S; Miller, Alexander J M.

Afiliación

Lindley BM; Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599-3290 , USA . Email: ajmm@email.unc.edu.
Walden AG; Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599-3290 , USA . Email: ajmm@email.unc.edu.
Brasacchio AM; Oglethorpe University , Atlanta , Georgia 30319 , USA.
Casuras A; Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599-3290 , USA . Email: ajmm@email.unc.edu.
Lease N; High Point University , High Point , NC 27262 , USA.
Chen CH; Rutgers, The State University of New Jersey , New Brunswick , New Jersey 08903 , USA.
Goldman AS; Rutgers, The State University of New Jersey , New Brunswick , New Jersey 08903 , USA.
Miller AJM; Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599-3290 , USA . Email: ajmm@email.unc.edu.

Chem Sci ; 10(40): 9326-9330, 2019 Oct 28.

Article en En | MEDLINE | ID: mdl-32110295

RESUMEN

A C-H bond activation strategy based on electrochemical activation of a metal hydride is introduced. Electrochemical oxidation of ( tBu4 PCP)IrH4 ( tBu4 PCP is [1,3-( t Bu2PCH2)-C6H3]-) in the presence of pyridine derivatives generates cationic Ir hydride complexes of the type [( tBu4 PCP)IrH(L)]+ (where L = pyridine, 2,6-lutidine, or 2-phenylpyridine). Facile deprotonation of [( tBu4 PCP)IrH(2,6-lutidine)]+ with the phosphazene base tert-butylimino-tris(pyrrolidino)phosphorane, t BuP1(pyrr), results in selective C-H activation of 1,2-difluorobenzene (1,2-DFB) solvent to generate ( tBu4 PCP)Ir(H)(2,3-C6F2H3). The overall electrochemical C-H activation reaction proceeds at room temperature without need for chemical activation by a sacrificial alkene hydrogen acceptor. This rare example of undirected electrochemical C-H activation holds promise for the development of future catalytic processes.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Chem Sci Año: 2019 Tipo del documento: Article Pais de publicación: Reino Unido

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