Abstract
The complex [IndCpMo(NCMe) 2][BF 4] 2 provides a suitable entry to the synthesis of IndCpMoBr 2 and IndCpMoMe 2. The latter, also available from IndCpMoX 2 (X = Cl, Br) and MeMgCl, reacts with HCl to give IndCpMoCl(Me) which, in turn reacts with NaSPh to yield IndCpMo(SPh)(Me). Cyclic voltammetry shows that these three alkyl complexes undergo a 1e reversible oxidation to 17 e Mo V cations. IndCpMoCl(Me) is oxidized by [Cp 2Fe]BF 4 to afford [IndCpMoCl(Me)]BF 4 in 95% yield. Reaction of [IndCpMo(NCMe) 2][BF 4] 2 with KBPz 4 in CH 2Cl 2/NMF leads to [IndCpMo(κ 2-BPz 4)]BF 4. Taken together with previous reports these results show that the indenyl ring slows down substitutional chemistry at the Cp 2 ′ Mo ( IV ) fragment (Cp′ = Cp, Ind) by steric reasons, overshadowing any acceleration due to a possible indenyl effect.
Published Version
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