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- W4377013083 endingPage "11677" @default.
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- W4377013083 abstract "The use of 1,3,4,5-tetramethylimidazol-2-ylidene (IMe) to coordinate with diatomic B2 species afforded a tetrakis(N-heterocyclic carbene)-diboron(0) [(IMe)2B–B(IMe)2] (2). The singly bonded B2 moiety therein possesses a valence electronic configuration 1σg21πu21πg*2 with four vacant molecular orbitals (1σu*, 2σg, 1πu′, 1πg′*) coordinated with IMe. Its unprecedented electronic structure is analogous to the energetically unfavorable planar hydrazine with a D2h symmetry. The two highly reactive πg* antibonding electrons enable double single-electron-transfer (SET) reactivity in small-molecule activation. Compound 2 underwent a double SET reduction with CO2 to form two carbon dioxide radical anions CO2•–, which then reduced pyridine to yield a carboxylated pyridine reductive coupling dianion [O2CNC5(H)5–C5(H)5NCO2]2– and converted compound 2 to the tetrakis(N-heterocyclic carbene)-diborene dication [(IMe)2B═B(IMe)2]2+ (32+). This is a remarkable transition-metal-free SET reduction of CO2 without ultraviolet/visible (UV/vis) light conditions." @default.
- W4377013083 created "2023-05-19" @default.
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- W4377013083 date "2023-05-18" @default.
- W4377013083 modified "2023-10-17" @default.
- W4377013083 title "Tetrakis(<i>N</i>-heterocyclic Carbene)-Diboron(0): Double Single-Electron-Transfer Reactivity" @default.
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- W4377013083 doi "https://doi.org/10.1021/jacs.3c01801" @default.
- W4377013083 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37201187" @default.
- W4377013083 hasPublicationYear "2023" @default.
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