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Isolation of base stabilized fluoroborylene and its radical cation

Sarkar, Samir Kumar and Siddiqui, Mujahuddin M and Kundu, Subrata and Ghosh, Munmun and Kretsch, Johannes and Stollberg, Peter and Herbst-Irmer, Regine and Stalke, Dietmar and Stueckl, A Claudia and Schwederski, Brigitte and Kaim, Wolfgang and Ghorai, Sagar and Jemmis, Eluvathingal D and Roesky, Herbert W (2019) Isolation of base stabilized fluoroborylene and its radical cation. In: DALTON TRANSACTIONS, 48 (24). pp. 8551-8555.

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Official URL: https://dx.doi.org/10.1039/c9dt01899a


Herein, we report the synthesis and characterization of the metal free low valent fluoroborylene (Me-cAAC)(2)BF] (1) stabilized by cyclic (alkyl)(amino) carbene (cAAC). The fluoroborylene 1 is obtained by the reductive defluorination of Me-cAAC:BF3 with 2.0 equivalents of KC8 in the presence of 1.0 equivalent of Me-cAAC. Due to its highly electron rich nature, 1 underwent one-electron oxidation with 1.0 equivalent of lithium tetrakis(pentafluorophenyl)borate LiB(C6F5)(4)] to form the radical cation (Me-cAAC)(2)BF](+)B(C6F5)(4)](-) (2). DFT studies suggested that the lone pair of electrons is localized on the boron atom in 1, which explains its unprecedented reactivity. Both compounds 1 and 2 were characterized by X-ray crystallography. The radical cation 2 was studied by EPR spectroscopy.

Item Type: Journal Article
Additional Information: copyright for this article belongs to ROYAL SOC CHEMISTRY
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 14 Aug 2019 09:57
Last Modified: 14 Aug 2019 09:57
URI: http://eprints.iisc.ac.in/id/eprint/63179

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