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Isolating Free Carbenes, their Mixed Dimers and Organic Radicals
Published on: April 19, 2019
A cationic sulfur-hydrocarbon triradical with an excited quartet state
Shuxuan Tang1, Huapeng Ruan1, Zhaobo Hu1
1State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, China. xpwang@nju.edu.cn.
Abstract:
The triptycene-bridged tris(thianthrene) compound 1 was designed and synthesized. Three-electron oxidation of 1 by NO[Al(OC(CF3)3)4], followed by crystallization at two different temperatures resulted in the triradical trication salts 2a and 2b respectively, which feature different crystal packing patterns. The triradical trications in 2a and 2b both feature a doublet ground state which can be thermally populated to a quartet state, representing the first examples of cationic main-group triradicals.
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