title: Metal-only Lewis pairs by reversible insertion of ruthenium and osmium fragments into metal-boron double bonds.
abstract: New metal-only Lewis pairs (MOLPs: Ru→Cr and Os→Cr) are prepared by the insertion of a zerovalent ruthenium or osmium complex into chromium-boron double bonds of borylene complexes. The reaction creates new borylene complexes (the first ever for osmium), and is crystallization-controlled; re-dissolving the complexes results in regeneration of the starting materials. A mechanism is proposed based on DFT calculations, along with a computational study of the unusual MOLPs.
authors.affiliation: Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg (Germany) http://www-anorganik.chemie.uni-wuerzburg.de/Braunschweig/
authors.forename: Stefanie
authors.initials: S
authors.lastname: Bertsch
authors.forename: Rüdiger
authors.initials: R
authors.lastname: Bertermann
authors.forename: Holger
authors.initials: H
authors.lastname: Braunschweig
authors.forename: Alexander
authors.initials: A
authors.lastname: Damme
authors.forename: Rian D
authors.initials: RD
authors.lastname: Dewhurst
authors.forename: Ashwini K
authors.initials: AK
authors.lastname: Phukan
authors.forename: Christian
authors.initials: C
authors.lastname: Saalfrank
authors.forename: Alfredo
authors.initials: A
authors.lastname: Vargas
authors.forename: Benedikt
authors.initials: B
authors.lastname: Wennemann
authors.forename: Qing
authors.initials: Q
authors.lastname: Ye
keywords: bimetallic complexes; boron; borylene; metal-only Lewis pairs; transition-metal complexes