The unusual reactions of indium(I) trifluoromethanesulfonate with some first row metallocenes and the structure of “indium(II) cyclopentadienide”

Add time:08/24/2019    Source:sciencedirect.com

The soluble reagent indium(I) trifluoromethanesulfonate, InOTf, does not appear to react or interact with ferrocene (Cp2Fe, Cp = C5H5) whereas cobaltocene reacts with InOTf to produce [Cp2Co]+[OTf]− and indium metal. Unexpectedly, the reaction of InOTf with manganocene results in the formation of the unprecedented salt [In(μ2,η5-Cp)In]+[Cp3In(μ2,η1-Cp)InCp3]−: a form of “Cp2In” that is characterized by X-ray crystallography. Similarly, the reaction of InOTf with [Cp2Fe]+[PF6]− produces Cp2Fe and “In4OTf6” in addition to other products. The unusual structural features and the formation of the new indium-containing products are rationalized.

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