A New Conformation With an Extraordinarily Long, 3.04 Å Two‐Electron, Six‐Center Bond Observed for the π‐[TCNE]₂²⁻ Dimer in [NMe₄]₂[TCNE]₂ (TCNE=Tetracyanoethylene)

Abstract

Invited for the cover of this issue are the groups of Joel S. Miller at the University of Utah and Juan J. Novoa at the University of Barcelona. The image depicts a visualization of the energy difference between the new 2e(-) /6c and the established 2e(-) /4c bond for C2 and D2h conformations, respectively, for π-[TCNE]2 (2-) . Read the full text of the article at 10.1002/chem.201501963.