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Issue 1, 2018
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1,3,2-Diazaborole-derived carbene complexes of boron

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Abstract

Reaction of 2-bromo-1,3,2-diazaborole (1) with excess BBr3 induces 1,2-hydrogen migration, giving 1,3,2-diazaborole-derived carbene complexes of boron bromide (2). Compound 2 exists in a dynamic solution equilibrium with 1. The 1H NMR study shows that the equilibrium lies to the right side of the dissociation reaction of 2. Parallel reaction of 1 with excess BI3 gives the corresponding 1,3,2-diazaborole-derived carbene boron iodide complex (3). Notably, in contrast to 2, the dissociation reaction of 3 largely lies to the left side, favouring the formation of 3. The dynamic solution equilibrium behaviours of 2 and 3 are probed by both experimental and theoretical methods.

Graphical abstract: 1,3,2-Diazaborole-derived carbene complexes of boron

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Publication details

The article was received on 29 Oct 2017, accepted on 16 Nov 2017 and first published on 16 Nov 2017


Article type: Communication
DOI: 10.1039/C7DT04079B
Citation: Dalton Trans., 2018,47, 41-44
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    1,3,2-Diazaborole-derived carbene complexes of boron

    H. P. Hickox, Y. Wang, K. M. Luedecke, Y. Xie, P. Wei, D. Carrillo, N. L. Dominique, D. Cui, H. F. Schaefer and G. H. Robinson, Dalton Trans., 2018, 47, 41
    DOI: 10.1039/C7DT04079B

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