Issue 5, 2023

A decacationic ferrocene-based metallostar


Decacationic metallostars have been prepared by the reaction of permercurated ferrocene FeC10(HgO2CCF3)10 with superacidic (C5F5NH)(SbF6) (pKa = −11 estimated in H2O) in multigram scale. In the resulting compound, [FeC10Hg10(NC5F5)n][SbF6]10, the labile pentafluoropyridine ligands are readily displaced by acetonitrile (MeCN) or tetrahydrothiophene (THT). In the X-ray structure of [FeC10Hg10(THT)10][SbF6]10·24 MeCN no cation–anion contacts between mercury and fluorine were observed. Moreover, cyclic voltammetry measurements of [FeC10(Hg(MeCN))10]10+ and [FeC10(Hg(THT))10]10+ revealed a (quasi)reversible one-electron oxidation of Fe(II) to Fe(III). From the reaction of [FeC10(Hg(MeCN))10]10+ with MoF6 as oxidant the ferrocenium cation [FeC10(Hg(MeCN))10]11+ was obtained and characterized via single crystal XRD. These electrophilic metallostars are promising potential building blocks for the synthesis of dendritic architectures containing a robust, tenfold functionalized ferrocene core.

Graphical abstract: A decacationic ferrocene-based metallostar

Supplementary files

Article information

Article type
Edge Article
07 Nov 2022
27 Dec 2022
First published
28 Dec 2022
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2023,14, 1132-1137

A decacationic ferrocene-based metallostar

S. M. Rupf, A. L. Moshtaha and M. Malischewski, Chem. Sci., 2023, 14, 1132 DOI: 10.1039/D2SC06151A

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