Please use this identifier to cite or link to this item: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/7431
Title: A bis-NHC–CAAC dimer derived dicationic diradical
Authors: Nayak, Mithilesh Kumar
VIJAYAKANTH, THANGAVEL
BOOMISHANKAR, RAMAMOORTHY et al.
Dept. of Chemistry
Keywords: Chemistry
2022-OCT-WEEK3
TOC-OCT-2022
2022
Issue Date: Nov-2022
Publisher: Royal Society of Chemistry
Citation: Chemical Science, 13(42), 12533-12539.
Abstract: The isolation of carbon-centered diradicals is always challenging due to synthetic difficulties and their limited stability. Herein we report the synthesis of a trans-1,4-cyclohexylene bridged bis-NHC–CAAC dimer derived thermally stable dicationic diradical. The diradical character of this compound was confirmed by EPR spectroscopy. The variable temperature EPR study suggests the singlet state to be marginally more stable than the triplet state (2J = −5.5 cm−1 (ΔEST = 0.065 kJ mol−1)). The presence of the trans-1,4-cyclohexylene bridge is instrumental for the successful isolation of this dicationic diradical. Notably, in the case of ethylene or propylene bridged bis-NHC–CAAC dimers, the corresponding dicationic diradicals are transient and rearrange to hydrogen abstracted products.
URI: https://doi.org/10.1039/D2SC03937K
http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/7431
ISSN: 2041-6520
2041-6539
Appears in Collections:JOURNAL ARTICLES

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