title: Insights into metal-ligand hydrogen transfer: a square-planar ruthenate complex supported by a tetradentate amino-amido-diolefin ligand.
abstract: A four-coordinate, sixteen-electron Ru(0) complex containing the tetradentate diamino-diolefin ligand (±)-trans-N,N-bis(5H-dibenzo[a,d]cyclohepten-5-yl)-1,2-diaminocyclohexane (trop2dach) has been synthesised. Deprotonation of one amino N-H functional group generates an unprecedented four-coordinate ruthenate species which has been characterised in solution and in the solid state. The newly formed ruthenate complex undergoes intramolecular metal-ligand N-H addition/elimination in solution to generate a transient diamido ruthenium hydride species, as supported by NMR spectroscopy and density functional theory.
authors.affiliation: Department of Chemistry, University of Toronto, 80 Saint George St., Toronto, Ontario M5S3H6, Canada. rmorris@chem.utoronto.ca.
authors.forename: Demyan E
authors.initials: DE
authors.lastname: Prokopchuk
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Lough
authors.forename: Rafael E
authors.initials: RE
authors.lastname: Rodriguez-Lugo
authors.forename: Robert H
authors.initials: RH
authors.lastname: Morris
authors.forename: Hansjörg
authors.initials: H
authors.lastname: Grützmacher