Yadav, Rahul Kumar and Parveen, Darakshan and Jangra, Parmod and Mondal, Bijan and Roy, Dipak Kumar (2025) Synthesis, Characterization, and Reactivity of Aminotroponiminate-Based Difluoroboranes: A Pathway toward Bore(boro)nium Cations. INORGANIC CHEMISTRY, 64 (22). pp. 10780-10791. ISSN 0020-1669, 1520-510X
Full text not available from this repository. (Request a copy)Abstract
Aminotroponiminates (ATIs), a well-known monoanionic bidentate ligand, display a wide range of coordination chemistry. To exploit their electronic and steric factors in achieving boron cations, a series of symmetrical, unsymmetrical, and bis(ATI) borane complexes [(C7H5)(N i Pr)2BF2] (3a), [(C7H5)(N t Bu)2BF2] (3b), [(C7H5)(N i Bu)2BF2] (3c), [(C7H5)(N i Bu)(N t Bu)BF2] (3d), and [(C7H5)(N i Pr)(NCH2)BF2]2 (3e) were synthesized in this work. All the ATI borane complexes are highly blue luminescent in the solution, and their fluorescence decay time was recorded in DCM. The observed decay time range was found to exist between 1.7 and 2.8 ns. Complexes 3a and 3b when treated with trimethylsilyl triflate (TMS-OTf) enabled the isolation of tricoordinated borenium cations [(C7H5)(N i Pr)2BOH]+ (4a) and [(C7H5)(N t Bu)2BOH]+ (4b), respectively. Interestingly, the reaction of bis(ATI) borane 3e and TMS-OTf resulted in a boron dication 4e in which the borenium and boronium cations are bridged via an oxygen atom in a seven-membered ring scaffold. All of the ATI boranes and cations were well characterized by various spectroscopic techniques in solution and X-ray structure diffraction analysis in the solid state. Further, theoretical calculations using density functional theory (DFT) were conducted to understand the electronic structure and bonding scenario of these complexes.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CATALYZED HYDROBORATION; PERTURBATION-THEORY; BORENIUM CATIONS; BORON; ACTIVATION; CHEMISTRY; DENSITY; FUNCTIONALS; COMPLEXES; BORINIUM |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 17 Jun 2026 04:31 |
| Last Modified: | 17 Jun 2026 04:31 |
| URI: | https://pred.uni-regensburg.de/id/eprint/66818 |
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