Reactions of [Cp*2Fe] with the Lewis acid [Zn(C6F5)2] in the presence of [(PhC(S)S)2], 9,10‐phenanthrenedione or 4,5‐pyrenedione yield the salt [Cp*2Fe][(PhC(S)S)Zn(C6F5)2] 1, [Cp*2Fe][((C14H8O2)Zn(C6F5)2)⋅] 4, and [Cp*2Fe][((C16H8O2)Zn(C6F5)2)⋅] 5, respectively. The latter two species represent the first examples of isolable zinc‐containing radical anions. While [(PhC(S)S)2] binds weakly to [Zn(C6F5)2], the diones afford the isolable adducts [(C14H8O2)Zn(C6F5)2] 2 and [(C16H8O2)Zn(C6F5)2] 3. Cyclic voltammetry and computational studies support the view that 4 and 5 are formed via single electron transfer (SET) to the donor–acceptor adducts, 2 and 3, respectively. Subsequent treatment of 4 and 5 with [NC5H4NMe2] affords [Zn(C6F5)2(NC5H4NMe2)2] with liberation of the dione, and regeneration of [Cp*2Fe].
Chemistry - A European Journal – Wiley
Published: Jan 15, 2018
Keywords: ; ; ; ;
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