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Published on: April 19, 2019
Hexathiophenalenyliums cations: syntheses, structures, and redox chemistry
Pradip Bag1, Fook S Tham, Bruno Donnadieu
1Department of Chemistry, University of California, Riverside, California 92521-0403, USA.
Abstract:
Preparations of two hexathiophenalenylium compounds as stable salts from the reaction of 3,4,6,7-tetrathio-9-hydroxyphenalenone with Lawesson's reagent have been reported. The presence of three disulfide linkages on the periphery of the core phenalenyl unit is confirmed by X-ray crystallographic characterizations. Electrochemical cell potentials are lower than those of related dithio- and tetrathio-bridged phenalenyl radicals, and the hexathiophenalenyl radical shows a strong electron paramagnetic resonance (EPR) signal in the solid state.
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