Diborabutatriene: an electron deficient cumulene

Böhnke, Julian, Braunschweig, Holger, Ewing, William C, Hörl, Christian, Kramer, Thomas, Krummenacher, Ivo, Mies, Jan and Vargas, Alfredo (2014) Diborabutatriene: an electron deficient cumulene. Angewandte Chemie International Edition, 53 (34). pp. 9082-9085. ISSN 1433-7851

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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 π-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.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science > QD Chemistry
Depositing User: Alfredo Vargas
Date Deposited: 27 May 2014 10:21
Last Modified: 09 Mar 2021 11:15
URI: http://sro.sussex.ac.uk/id/eprint/48238

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