On the Reactivity of a NHC Nickel Bis-Boryl Complex: Reductive Elimination and Formation of Mono-Boryl Complexes.

Autor: Tendera L; Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany., Kuehn L; Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany., Marder TB; Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.; Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany., Radius U; Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
Jazyk: angličtina
Zdroj: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2023 Nov 08; Vol. 29 (62), pp. e202302310. Date of Electronic Publication: 2023 Sep 27.
DOI: 10.1002/chem.202302310
Abstrakt: The synthesis of the first terminal mono-boryl complexes of nickel, which are not stabilized by a pincer ligand, is reported. The reaction of the nickel bis-boryl complex cis-[Ni( i Pr 2 Im Me ) 2 (Bcat) 2 ] 1 (cat=1,2-O 2 C 6 H 4 ) with the small donor ligand PMe 3 led to a complete ligand exchange at nickel with reductive elimination of B 2 cat 2 and formation of the bis-NHC adduct [B 2 cat 2  ⋅ ( i Pr 2 Im Me ) 2 ] 3 and [Ni(PMe 3 ) 4 ] 2 as the metal-containing species. Electrophilic attack of MeI on complex 1 or ligand dismutation of 1 with trans-[Ni( i Pr 2 Im Me ) 2 Br 2 ] led to loss of only one boryl ligand of 1 and afforded the nickel mono-boryl complexes trans-[Ni( i Pr 2 Im Me ) 2 (Bcat)Br] 4 a and trans-[Ni( i Pr 2 Im Me ) 2 (Bcat)I] 4 b.
(© 2023 The Authors. Chemistry - A European Journal published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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