Article,

C4 Cumulene and the Corresponding Air-Stable Radical Cation and Dication

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Angewandte Chemie, International Edition, 53 (16): 4168--4172 (2014)
DOI: 10.1002/anie.201310975

Abstract

A neutral C4 cumulene 1 that includes a cyclic alkyl(amino) carbene (cAAC), its air-stable radical cation 1.+, and dication 12+ have been synthesized. The redox property of 1.+ was studied by cyclic voltammetry. EPR and theor. calcns. show that the unpaired electron in 1.+ is mainly delocalized over the central C4 backbone. The com. available CBr4 is utilized as a source of dicarbon in the cumulene synthesis. [on SciFinder(R)]

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