Scheme 3.

Reaction of monomeric complexes 8 to solvent separated ion [(THF)2K(18‐crown‐6)]+[4‐BzhH2BoxCH]− (11) via addition of one equivalent 18‐crown‐6. In solution permanent rearrangement of the (Z,Z)‐, (Z,E/E,Z)‐, and (E,E)‐(4‐BzhH2BoxCH) isomers is ubiquitous.