Tetra(2-thienyl)butatrienes: new butatriene derivatives with highly amphoteric multistage redox properties and a short central double bond
Abstract
Tetra(2-thienyl)butatrienes 2a–c show highly amphoteric redox properties; an X-ray structure of the tetrakistrimethylsilyl derivative 2b reveals a short bond length for the central double bond.