Tanaka H, Nakamoto M, Yoshida H. Computed ammonia affinity for evaluating Lewis acidity of organoboronates and organoboronamides.
RSC Adv 2023;
13:2451-2457. [PMID:
36741141 PMCID:
PMC9844674 DOI:
10.1039/d2ra07826k]
[Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 01/06/2023] [Indexed: 01/19/2023] Open
Abstract
Lewis acidity of organoboronates [B(pin), B(neop), B(cat), B(eg), B(nad)] and organoboronamides [B(dan), B(aam), B(mdan)] has been found to be unifiedly evaluated by computed ammonia affinity (AA), while other methods [LUMO energies, global electrophilicity index (GEI), fluoride ion affinity (FIA)] were only partially applicable. The relationships between the AA values and such structural characters including the B-X bond lengths, the X-B-X angles, and the changes in the B-X bond lengths in the formation of the ammonia adducts were also described.
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