DBU as base and ligand in phosphine-free ruthenium complexes for hydrogenation of CO2

Andrew Z. Preston; Alexander S. Phearman; Manuel Quiroz; Sarah E. Flowers; Nilakshi Devi; Christopher M. Zall; Eric S. Wiedner; Aaron M. Appel; John C. Linehan

doi:10.1039/D5CC00512D

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DBU as base and ligand in phosphine-free ruthenium complexes for hydrogenation of CO₂†

Andrew Z. Preston,

^a Alexander S. Phearman,

^a Manuel Quiroz,

^a Sarah E. Flowers,^a Nilakshi Devi,

^b Christopher M. Zall,

^b Eric S. Wiedner,

*^a Aaron M. Appel

^a and John C. Linehan

*^a

Author affiliations

* Corresponding authors

^a Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, USA
E-mail: eric.wiedner@pnnl.gov, john.linehan@pnnl.gov

^b Department of Chemistry, Sam Houston State University, Huntsville, Texas 77341, USA

Abstract

In the presence of DBU base, ruthenium piano stool complexes catalyze the hydrogenation of CO₂ to formate at room temperature without phosphine ligands. Thermodynamic and kinetic studies reveal the active catalyst is formed by binding DBU as a ligand.

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Article information

DOI: https://doi.org/10.1039/D5CC00512D
Article type: Communication
Submitted: 27 Jan 2025
Accepted: 06 Jun 2025
First published: 19 Jun 2025
This article is Open Access

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Chem. Commun., 2025, Advance Article

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DBU as base and ligand in phosphine-free ruthenium complexes for hydrogenation of CO₂

A. Z. Preston, A. S. Phearman, M. Quiroz, S. E. Flowers, N. Devi, C. M. Zall, E. S. Wiedner, A. M. Appel and J. C. Linehan, Chem. Commun., 2025, Advance Article , DOI: 10.1039/D5CC00512D

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Chemical Communications