title: Spectroscopic Evidence for a Monomeric Copper(I) Hydride and Crystallographic Characterization of a Monomeric Silver(I) Hydride.
abstract: (1,3-bis[2,6-bis[di(4-tert-butylphenyl)methyl]-4-methylphenyl]imidazol-2-ylidene)CuOPh [(IPr**)CuOPh] reacts with poly(methylhydrosiloxane) as the hydride donor to afford the monomeric (IPr**)CuH complex, which was spectroscopically characterized. The latter is in equilibrium in solution with [(IPr**)CuH]2, the dimer being exclusively present in the solid state. These results support the hypothesis that copper hydride aggregates dissociate in solution. In contrast, addition of pinacolborane to [(IPr**)AgOPh] at -40 °C allows the isolation of the monomeric (IPr**)AgH complex, which was crystallographically characterized.
authors.affiliation: Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA, 92093-0358, USA.
authors.forename: Erik A
authors.initials: EA
authors.lastname: Romero
authors.affiliation: Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA, 92093-0358, USA.
authors.forename: Pauline M
authors.initials: PM
authors.lastname: Olsen
authors.affiliation: Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA, 92093-0358, USA.
authors.forename: Rodolphe
authors.initials: R
authors.lastname: Jazzar
authors.affiliation: Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA, 92093-0358, USA.
authors.forename: Michele
authors.initials: M
authors.lastname: Soleilhavoup
authors.affiliation: UCSD Crystallography Facility, Department of Chemistry and Biochemistry, Urey Hall Room 5128, 9500 Gilman Drive, M/C 0358, La Jolla, CA, 92093-0358, USA.
authors.forename: Milan
authors.initials: M
authors.lastname: Gembicky
authors.affiliation: Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA, 92093-0358, USA.
authors.forename: Guy
authors.identifier: 0000-0003-2623-2363
authors.initials: G
authors.lastname: Bertrand
keywords: carbenes; copper; hydride; silver