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Creators/Authors contains: "Regnier, Vianney"

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  1. ; ; ; ; ; (, Journal of the American Chemical Society)
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  2. ; ; ; ; ; ; ; (, Organic Chemistry Frontiers)
    Bis(azoliums) are readily available in one step from cyclic (alkyl)(amino)carbenes and bis(acyl chlorides). A two-electron reduction of the bis(azolium), featuring a gem -(dimethyl)malonoyl spacer, leads to the corresponding transient diradical, which undergoes an intramolecular cyclization. The latter can be re-oxidized at a higher potential to yield back the bis(azolium). The redox bistability of this simple organic molecular system is linked to the formation of a weak C–O bond (27 kcal mol −1 ). Both redox forms can be isolated and stored for months without evidence of decay. 
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