Abstract
The solid-state structures of the first rubidium and caesium pentalenides [Rb(THF)]2[Ph4Pn] and [Cs(THF)]2[Ph4Pn] have been determined by single crystal X-ray diffraction. Both were found to be polymeric in the solid state through interactions of the cations with the phenyl substituents, in contrast to their lighter group 1 congeners which are monomeric for lithium and sodium, and THF-bridged for potassium. Both [Rb(THF)]2[Ph4Pn] and [Cs(THF)]2[Ph4Pn] displayed increased η8 coordination, demonstrating a shift towards higher hapticities down the group as previously predicted computationally for the parent M2[Pn] complexes (M=group 1 metal). The solid-state structures of the polydentate donor adducts [M(DME)x]2[Ph4Pn] (M=Li, x=1; M=Na, x=2) and [M(Me6TREN)]2[Ph4Pn] (M=K, Rb, Cs) were all monomeric and displayed increased metal-carbon distances and decreased ring slippage values relative to the THF adducts.
Original language | English |
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Article number | e202400039 |
Number of pages | 8 |
Journal | Zeitschrift fur Anorganische und Allgemeine Chemie |
Volume | 650 |
Issue number | 18 |
Early online date | 14 Aug 2024 |
DOIs | |
Publication status | Published - 16 Sept 2024 |
Data Availability Statement
The data that support the findings of this study are available in the supplementary material of this article.Funding
We thank the Royal Society (award UF160458) and the University of Bath for funding this work.
Keywords
- Alkali Metal Coordination
- Caesium
- Pentalenides
- Rubidium
ASJC Scopus subject areas
- Inorganic Chemistry