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Diborabutatriene: an electron deficient cumulene
journal contribution
posted on 2023-06-08, 17:03 authored by Julian Böhnke, Holger Braunschweig, William C Ewing, Christian Hörl, Thomas Kramer, Ivo Krummenacher, Jan Mies, Alfredo VargasAlfredo VargasThe complexation of two equivalents of a cyclic (amino)alkylcarbene (CAAC) to tetrabromodiborane(4), followed by reduction with four equivalents of sodium naphthalide led to the formation of the CAAC-stabilized linear diboracumulene (CAAC)2B2. The capacity of the CAAC ligand to facilitate B2?CAAC donation of p-electron density resulted in important differences between this species and a previously reported complex featuring a B=B triple-bond stabilized by cyclic di(amino)carbenes, including a longer B–B bond and shorter B–C bonds. Frontier orbital analysis indicated sharing of valence electrons across the entire linear C–B–B–C unit in (CAAC)2B2, which is supported by natural population analysis and cyclic voltammetry.
History
Publication status
- Published
File Version
- Published version
Journal
Angewandte Chemie International EditionISSN
1433-7851Publisher
WILEY-VCH VerlagExternal DOI
Issue
34Volume
53Page range
9082-9085Department affiliated with
- Chemistry Publications
Full text available
- No
Peer reviewed?
- Yes