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Coughlin, O. 
ORCID: 0000-0003-4528-9787, Krämer, T. and Benjamin, S.L. ORCID: 0000-0002-5038-1599,
2020.
Diverse structure and reactivity of pentamethylcyclopentadienyl antimony(iii) cations.
Dalton Transactions.
ISSN 1477-9226
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Abstract
The pentamethylcyclopentadienyl (Cp*) antimony(III) cations [Cp*2Sb][B(C6F5)4], [Cp2*Sb][OTf], [Cp*SbCl][B(C6F5)4] and [Cp*Sb][OTf]2 have been isolated and structurally characterised. [Cp*SbCl]+ forms dimers in the solid state via an intermolecular Sb–Cl interaction. Initial screening shows that [Cp*SbCl][B(C6F5)4] is significantly Lewis acidic and can catalyse the dimerisation of 1,1-diphenylethylene; [Cp2*Sb][B(C6F5)4] exhibits negligible Lewis acidity. Highly unstable [Cp*SbF][B(C6F5)4] could not be isolated, but stabilisation with the IMes ligand allowed isolation of [Cp*SbF(IMes)][B(C6F5)4]. Fluorodechlorination of CH2Cl2 and PhCCl3 was observed in the presence of crude [Cp*SbF][B(C6F5)4] in solution. A computational mechanistic investigation suggests that the latter proceeds via a carbocation intermediate.
| Item Type: | Journal article | ||||||
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| Publication Title: | Dalton Transactions | ||||||
| Creators: | Coughlin, O., Krämer, T. and Benjamin, S.L. | ||||||
| Publisher: | Royal Society of Chemistry | ||||||
| Date: | 19 January 2020 | ||||||
| ISSN: | 1477-9226 | ||||||
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| Divisions: | Schools > School of Science and Technology | ||||||
| Record created by: | Linda Sullivan | ||||||
| Date Added: | 22 Jan 2020 11:24 | ||||||
| Last Modified: | 31 May 2021 15:07 | ||||||
| URI: | https://irep.ntu.ac.uk/id/eprint/39045 |
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