Mono- and di-t-butyl substituted 2,2′-bis(1,3-dithia[3]ferrocenophane-2-ylidene) derivatives: TTF-like ferrocene analogs

Mono- and di-t-butyl substituted 2,2′-bis(1,3-dithia[3]ferrocenophane-2-ylidene) derivatives were prepared. These derivatives showed the E1/2(1) in lower potential region than that of differrocenyl-ethene and -ethyne. Also, the ΔE1/2 value declined according to the increase of a t-butyl group.