title: C4 cumulene and the corresponding air-stable radical cation and dication.
abstract: A neutral C4 cumulene 1 that includes a cyclic alkyl(amino) carbene (cAAC), its air-stable radical cation 1(·+) , and dication 1(2+) have been synthesized. The redox property of 1(·+) was studied by cyclic voltammetry. EPR and theoretical calculations show that the unpaired electron in 1(·+) is mainly delocalized over the central C4 backbone. The commercially available CBr4 is utilized as a source of dicarbon in the cumulene synthesis.
authors.affiliation: State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005 (China).
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Kartik Chandra
authors.initials: KC
authors.lastname: Mondal
authors.forename: Prinson P
authors.initials: PP
authors.lastname: Samuel
authors.forename: Hongping
authors.initials: H
authors.lastname: Zhu
authors.forename: Claudia M
authors.initials: CM
authors.lastname: Orben
authors.forename: Saravanan
authors.initials: S
authors.lastname: Panneerselvam
authors.forename: Birger
authors.initials: B
authors.lastname: Dittrich
authors.forename: Brigitte
authors.initials: B
authors.lastname: Schwederski
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Kaim
authors.forename: Totan
authors.initials: T
authors.lastname: Mondal
authors.forename: Debasis
authors.initials: D
authors.lastname: Koley
authors.forename: Herbert W
authors.initials: HW
authors.lastname: Roesky
keywords: cumulenes; cyclic alkyl(amino) carbenes; dications; radical ions; theoretical calculations