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Arnold PL, Halliday CJV, Puig-Urrea L, Nichol GS. Instantaneous and Phosphine-Catalyzed Arene Binding and Reduction by U(III) Complexes. Inorg Chem 2021; 60:4162-4170. [PMID: 33662207 DOI: 10.1021/acs.inorgchem.1c00327] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Neutral arenes such as benzene have never been considered suitable ligands for electropositive actinide cations, yet we find that even simple UIII UX3 aryloxide complexes such as U(ODipp)3 bind and reduce arenes spontaneously at room temperature, forming inverse arene sandwich (IAS) complexes XnU(μ-C6D6)UXm (X = ODipp, n=2, m=3; X = OBMes2 n=m=2 or 3) (ODipp = OC6H3iPr2-2,6; Mes = 2,4,6-Me3-C6H2). In some of these cases, further arene reduction has occured as a result of X ligand redistribution. These unexpected spontaneous reactions explain the anomalous spectra and reported lack of further reactivity of strongly reducing UIII centers of U(ODipp)3. Phosphines that are not considered suitable ligands for actinides can catalyze the formation of the IAS complexes. This enables otherwise inaccessible asymmetric and less congested IAS complexes to be isolated and the bonding in this series compared.
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Affiliation(s)
- Polly L Arnold
- EaStCHEM School of Chemistry, University of Edinburgh, The King's Buildings, Edinburgh EH9 3FJ, U.K
| | - Connor J V Halliday
- EaStCHEM School of Chemistry, University of Edinburgh, The King's Buildings, Edinburgh EH9 3FJ, U.K
| | - Laura Puig-Urrea
- EaStCHEM School of Chemistry, University of Edinburgh, The King's Buildings, Edinburgh EH9 3FJ, U.K
| | - Gary S Nichol
- EaStCHEM School of Chemistry, University of Edinburgh, The King's Buildings, Edinburgh EH9 3FJ, U.K
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Masubuchi T, Eckhard JF, Lange K, Visser B, Tschurl M, Heiz U. An efficient laser vaporization source for chemically modified metal clusters characterized by thermodynamics and kinetics. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:023104. [PMID: 29495846 DOI: 10.1063/1.5017588] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A laser vaporization cluster source that has a room for cluster aggregation and a reactor volume, each equipped with a pulsed valve, is presented for the efficient gas-phase production of chemically modified metal clusters. The performance of the cluster source is evaluated through the production of Ta and Ta oxide cluster cations, TaxOy+ (y ≥ 0). It is demonstrated that the cluster source produces TaxOy+ over a wide mass range, the metal-to-oxygen ratio of which can easily be controlled by changing the pulse duration that influences the amount of reactant O2 introduced into the cluster source. Reaction kinetic modeling shows that the generation of the oxides takes place under thermalized conditions at less than 300 K, whereas metal cluster cores are presumably created with excess heat. These characteristics are also advantageous to yield "reaction intermediates" of interest via reactions between clusters and reactive molecules in the cluster source, which may subsequently be mass selected for their reactivity measurements.
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Affiliation(s)
- Tsugunosuke Masubuchi
- Chair of Physical Chemistry, Catalysis Research Center, Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Jan F Eckhard
- Chair of Physical Chemistry, Catalysis Research Center, Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Kathrin Lange
- Chair of Physical Chemistry, Catalysis Research Center, Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Bradley Visser
- Chair of Physical Chemistry, Catalysis Research Center, Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Martin Tschurl
- Chair of Physical Chemistry, Catalysis Research Center, Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Ulrich Heiz
- Chair of Physical Chemistry, Catalysis Research Center, Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
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