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Completing the series of boron-nucleophilic cyanoborates : boryl anions of type NHC–B(CN)2−

Title data

Böser, Richard ; Haufe, Lisa C. ; Freytag, Matthias ; Jones, Peter G. ; Hörner, Gerald ; Frank, René:
Completing the series of boron-nucleophilic cyanoborates : boryl anions of type NHC–B(CN)2−.
In: Chemical Science. Vol. 8 (3 July 2017) Issue 9 . - pp. 6274-6280.
ISSN 2041-6539
DOI: https://doi.org/10.1039/C7SC02238G

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Since the first seminal report of boron-centred nucleophiles, the area of boryl anions has developed only sporadically and requires further systematisation. The boryl anions of type NHC–B(CN)2− (NHC = N-heterocyclic carbene) described herein complete a consistent series with the known anions cAAC–B(CN)2− [cAAC = cyclic(alkyl)(amino)carbene] and B(CN)32−. A novel approach towards NHC-stabilised cyanoboranes based on alkylthio-cyano exchange at boron is presented, and in contrast to other methods affords the products in better purity and yield. Reduction of suitable NHC–dicyanoboranes gave two unprecedented examples of NHC–B(CN)2− boryl anions. The latter were shown to react as boron-centred nucleophiles with facile formation of B–E bonds, where E = C, Si, Sn, P, Au. Bonding analysis by DFT calculations suggests a systematic variation of the energy of the boron-centred HOMO depending on the carbene, which in turn can control the nucleophilic character.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry IV
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry IV > Chair Inorganic Chemistry IV - Univ.-Prof. Dr. Birgit Weber
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 06 Jul 2020 12:25
Last Modified: 06 Jul 2020 12:25
URI: https://eref.uni-bayreuth.de/id/eprint/55706