Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 143, Issue 10, Pages 3687-3692Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.0c12624
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Funding
- Department of Atomic Energy, Government of India [RTI 4007]
- SERB, India [CRG/2019/003415]
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This study presents the synthesis and characterization of anionic boron- and carbon-based Kekule diradicaloids connected by a p-phenylene bridge, which exhibit triplet state properties at room temperature. Additionally, the formation of an isolable diamino(4-diarylboryl-phenyl)methyl radical was observed during the synthesis process.
Herein we report the synthesis and characterization of anionic boron- and carbon-based Kekule diradicaloids spanned by a p-phenylene bridge. In contrast to Thiele's hydrocarbon, a closed-shell singlet system, they show an appreciable population of the triplet state at room temperature, as evidenced by both NMR and EPR spectroscopy. Moreover, en route to these anionic boron- and carbon-based hetero-diradicaloids, the formation of an isolable diamino(4-diarylboryl-phenyl)methyl radical was observed.
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