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Böhnke J, Braunschweig H, Dellermann T, et al. The Synthesis of B2(SIDip)2 and its Reactivity Between the Diboracumulenic and Diborynic Extremes. Angew Chem Int Ed Engl. 2015;54(46):13801-5doi: 10.1002/anie.201506368.
Böhnke, J., Braunschweig, H., Dellermann, T., Ewing, W. C., Hammond, K., Jimenez-Halla, J. O., Kramer, T., & Mies, J. (2015). The Synthesis of B2(SIDip)2 and its Reactivity Between the Diboracumulenic and Diborynic Extremes. Angewandte Chemie (International ed. in English), 54(46), 13801-5. https://doi.org/10.1002/anie.201506368
Böhnke, Julian, et al. "The Synthesis of B2(SIDip)2 and its Reactivity Between the Diboracumulenic and Diborynic Extremes." Angewandte Chemie (International ed. in English) vol. 54,46 (2015): 13801-5. doi: https://doi.org/10.1002/anie.201506368
Böhnke J, Braunschweig H, Dellermann T, Ewing WC, Hammond K, Jimenez-Halla JO, Kramer T, Mies J. The Synthesis of B2(SIDip)2 and its Reactivity Between the Diboracumulenic and Diborynic Extremes. Angew Chem Int Ed Engl. 2015 Nov 09;54(46):13801-5. doi: 10.1002/anie.201506368. Epub 2015 Oct 01. PMID: 26427026.
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Angew Chem Int Ed Engl. 2015 Nov 09;54(46):13801-5. doi: 10.1002/anie.201506368. Epub 2015 Oct 01.

The Synthesis of B2(SIDip)2 and its Reactivity Between the Diboracumulenic and Diborynic Extremes.

Angewandte Chemie (International ed. in English)

Julian Böhnke, Holger Braunschweig, Theresa Dellermann, William C Ewing, Kai Hammond, J Oscar C Jimenez-Halla, Thomas Kramer, Jan Mies

Affiliations

  1. Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg (Germany).
  2. Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg (Germany). [email protected].
  3. Department of Chemistry, Division of Natural and Exact Sciences, University of Guanajuato, campus Gto, Noria Alta s/n 36050 Guanajuato (Mexico).

PMID: 26427026 DOI: 10.1002/anie.201506368

Abstract

A new compound with the formula L-B2-L wherein the stabilizing ligand (L) is 1,3-bis[diisopropylphenyl]-4,5-dihydroimidazol-2-ylidene (SIDip) has been synthesized, isolated, and characterized. The π-acidity of the SIDip ligand, intermediate between the relatively non-acidic IDip (1,3-bis[diisopropylphenyl]imidazol-2-ylidene) ligand and the much more highly acidic CAAC (1-[2,6-diisopropylphenyl]-3,3,5,5-tetramethylpyrrolidin-2-ylidene) ligand, gives rise to a compound with spectroscopic, electrochemical, and structural properties between those of L-B2-L compounds stabilized by CAAC and IDip. Reactions of all three L-B2-L compounds with CO demonstrate the differences caused by their respective ligands, as the π-acidities of the CAAC and SIDip carbenes enabled the isolation of bis(boraketene) compounds (L(OC)B-B(CO)L), which could not be isolated from reactions with B2(IDip)2. However, only B2(IDip)2 and B2(SIDip)2 could be converted into bicyclic bis(boralactone) compounds.

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: boron; carbenes; main-group chemistry; multiple bonds; thermochemistry

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