Synthesis, Characterization, and Reactivity of Aminotroponiminate-Based Difluoroboranes: A Pathway toward Bore(boro)nium Cations

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: May 10, 2025

Aminotroponiminates (ATIs), a well-known monoanionic bidentate ligand, display wide range of coordination chemistry. To exploit their electronic and steric factors in achieving boron cations, series symmetrical, unsymmetrical, bis(ATI) borane complexes [(C7H5)(NiPr)2BF2] (3a), [(C7H5)(NtBu)2BF2] (3b), [(C7H5)(NiBu)2BF2] (3c), [(C7H5)(NiBu)(NtBu)BF2] (3d), [(C7H5)(NiPr)(NCH2)BF2]2 (3e) were synthesized this work. All the ATI are highly blue luminescent solution, fluorescence decay time was recorded DCM. The observed found to exist between 1.7 2.8 ns. Complexes 3a 3b when treated with trimethylsilyl triflate (TMS-OTf) enabled isolation tricoordinated borenium cations [(C7H5)(NiPr)2BOH]+ (4a) [(C7H5)(NtBu)2BOH]+ (4b), respectively. Interestingly, reaction 3e TMS-OTf resulted dication 4e which boronium bridged via an oxygen atom seven-membered ring scaffold. boranes well characterized by various spectroscopic techniques solution X-ray structure diffraction analysis solid state. Further, theoretical calculations using density functional theory (DFT) conducted understand bonding scenario these complexes.

Language: Английский

Boron-Catalyzed Formylation of Indoles Using Trimethyl Orthoformate as Carbonyl Source

ACS Omega, Journal Year: 2025, Volume and Issue: unknown

Published: May 14, 2025

Language: Английский