Reversible redox chemistry of anionic imidazole-2-thione-fused 1,4-dihydro-1,4-diphosphinines

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Ramachandran, Mridhul R. K.
Schnakenburg, Gregor
Majumdar, Moumita
Kelemen, Zsolt
Gal, Dalma
Nyulaszi, Laszlo
Boeré, René T.
Streubel, Rainer K.
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ACS Publications
Anionic 1,4-dihydro-1,4-diphosphinines were synthesized from tricyclic 1,4-diphosphinines and isolated as blue powdery salts M[2a–2c]. Reaction of solutions of these monoanions with iodomethane led to P-methylated compounds 3a–3c. An oxidation/reduction cycle was examined, starting from solutions of K[2a] via P–P coupled product 4a and back to K[2a], and the recyclability and redox chemistry of this cycle were confirmed by experimental and simulated cyclic voltammetry analysis, which is proposed as a potential 2-electron cathode for rechargeable cells. TD-DFT studies were used to examine species that might be involved in the process.
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Redox reactions
Ramachandran, M. R. K., Schnakenburg, G., Majumdar, M., Kelemen, Z., Gal, D., Nyulaszi, L., Boeré, R. T., & Streubel, R. K. (2022). Reversible redox chemistry of anionic imadazole-2-thione-fused 1,4-dihydro-1,4-diphosphinines. Inorganic Chemistry, 61(11), 4639-4646.