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- Title
Dibora[2]ferrocenophane: A Carbene-Stabilized Diborene in a Strained cis-Configuration.
- Authors
Braunschweig, Holger; Krummenacher, Ivo; Lichtenberg, Crispin; Mattock, James D.; Schäfer, Marius; Schmidt, Uwe; Schneider, Christoph; Steffenhagen, Thomas; Ullrich, Stefan; Vargas, Alfredo
- Abstract
Unsaturated bridges that link the two cyclopentadienyl ligands together in strained ansa metallocenes are rare and limited to carbon-carbon double bonds. The synthesis and isolation of a strained ferrocenophane containing an unsaturated two-boron bridge, isoelectronic with a C=C double bond, was achieved by reduction of a carbene-stabilized 1,1′-bis(dihaloboryl)ferrocene. A combination of spectroscopic and electrochemical measurements as well as density functional theory (DFT) calculations was used to assess the influence of the unprecedented strained cis configuration on the optical and electrochemical properties of the carbene-stabilized diborene unit. Initial reactivity studies show that the dibora[2]ferrocenophane is prone to boron-boron double bond cleavage reactions.
- Subjects
CARBENES; METALLOCENES; DOUBLE bonds; UNSATURATED compounds; ISOELECTRONIC sequences; SCISSION (Chemistry)
- Publication
Angewandte Chemie International Edition, 2017, Vol 56, Issue 3, p889
- ISSN
1433-7851
- Publication type
Article
- DOI
10.1002/anie.201609601