The methylene-bridged triphenylamine 2 has been oxidized to planar radical cation 2(•+) by B(C6F5)3 or Ag(+). Further reaction of 2(•+)[Al(ORF)4](-) and 2 with trace amounts of silver salt resulted in dication 3(2+), providing a rare example of structurally characterized bis(triarylamine) "bipolarons". 3(2+) can be directly prepared by the reaction of 3 with 2 equiv of Ag(+). X-ray structural analysis together with theoretical calculation shows that 3(2+) has singlet diradical character and is analogous to Chichibabin's hydrocarbons.
Wärmend: Das Anilin‐Radikalkation TBA.+ (TBA=2,4,6‐tBu3C6H2NH2) konnte sowohl in Lösung als auch im Festkörper stabilisiert werden. Im Kristall liegt es in Form zweier Isomere vor, die in einem temperaturabhängigen Gleichgewicht stehen, und ist durch eine theoretisch nicht erwartete extrem lange C‐N‐Bindung charakterisiert.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.