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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 Vargas
The 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 Edition

ISSN

1433-7851

Publisher

WILEY-VCH Verlag

Issue

34

Volume

53

Page range

9082-9085

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2014-05-27

First Compliant Deposit (FCD) Date

2021-03-09

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