Room Temperature Hydrogenation of CO2 Utilizing a Cooperative Phosphorus Pyridone‐Based Iridium Complex

Shepherd Siangwata; Alex Hamilton; Graham John Tizzard; Simon J. Coles; Gareth  Owen

doi:10.1002/cctc.202301627

Room Temperature Hydrogenation of CO2 Utilizing a Cooperative Phosphorus Pyridone‐Based Iridium Complex

Shepherd Siangwata, Alex Hamilton, Graham John Tizzard, Simon J. Coles, Gareth Owen^*

^*Corresponding author for this work

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Abstract

The synthesis, characterization and application of a new complex, [Ir(κ2-P,N-6-DCyPon*)(COD)] (1), where 6-DCyPon* is the anionic species, 6-dicyclohexylphosphino-2-oxo-pyridinide, is reported herein. Complex 1 was found to be an active catalyst in the hydrogenation of CO2 at room temperature. The ligand, 6-DCyPon*, is derived via deprotonation of a novel pro-ligand, 6-DCyPon (6-dicyclohexylphosphino-2-pyridone) during the synthesis of 1. The ligand is shown to participate within the reversible hydrogenation of 1, via a cooperative process, in which the species, [IrH3(κ2-P,N-6-DCyPon)(COD)] (2), was spectroscopically characterized, where 1 reacts with two equivalents of H2.

Original language	English
Article number	e202301627
Number of pages	6
Journal	ChemCatChem
Volume	16
Issue number	8
Early online date	31 Jan 2024
DOIs	https://doi.org/10.1002/cctc.202301627
Publication status	Published - 20 Feb 2024

Keywords

Carbon Dioxide
Hydrogenation
Ligand Cooperation
Proton Responsive Ligands
Room Temperature Homogeneous Catalysis

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Version of Record with a CC BY LicenceFinal published version, 2.1 MBLicence: CC BY

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@article{eedb1529edd5429ca73bd92f5b8149bd,

title = "Room Temperature Hydrogenation of CO2 Utilizing a Cooperative Phosphorus Pyridone‐Based Iridium Complex",

abstract = "The synthesis, characterization and application of a new complex, [Ir(κ2-P,N-6-DCyPon*)(COD)] (1), where 6-DCyPon* is the anionic species, 6-dicyclohexylphosphino-2-oxo-pyridinide, is reported herein. Complex 1 was found to be an active catalyst in the hydrogenation of CO2 at room temperature. The ligand, 6-DCyPon*, is derived via deprotonation of a novel pro-ligand, 6-DCyPon (6-dicyclohexylphosphino-2-pyridone) during the synthesis of 1. The ligand is shown to participate within the reversible hydrogenation of 1, via a cooperative process, in which the species, [IrH3(κ2-P,N-6-DCyPon)(COD)] (2), was spectroscopically characterized, where 1 reacts with two equivalents of H2.",

keywords = "Carbon Dioxide, Hydrogenation, Ligand Cooperation, Proton Responsive Ligands, Room Temperature Homogeneous Catalysis",

author = "Shepherd Siangwata and Alex Hamilton and Tizzard, {Graham John} and Coles, {Simon J.} and Gareth Owen",

year = "2024",

month = feb,

day = "20",

doi = "10.1002/cctc.202301627",

language = "English",

volume = "16",

journal = "ChemCatChem",

issn = "1867-3880",

publisher = "Wiley - VCH Verlag GmbH & CO. KGaA",

number = "8",

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TY - JOUR

T1 - Room Temperature Hydrogenation of CO2 Utilizing a Cooperative Phosphorus Pyridone‐Based Iridium Complex

AU - Siangwata, Shepherd

AU - Hamilton, Alex

AU - Tizzard, Graham John

AU - Coles, Simon J.

AU - Owen, Gareth

PY - 2024/2/20

Y1 - 2024/2/20

N2 - The synthesis, characterization and application of a new complex, [Ir(κ2-P,N-6-DCyPon*)(COD)] (1), where 6-DCyPon* is the anionic species, 6-dicyclohexylphosphino-2-oxo-pyridinide, is reported herein. Complex 1 was found to be an active catalyst in the hydrogenation of CO2 at room temperature. The ligand, 6-DCyPon*, is derived via deprotonation of a novel pro-ligand, 6-DCyPon (6-dicyclohexylphosphino-2-pyridone) during the synthesis of 1. The ligand is shown to participate within the reversible hydrogenation of 1, via a cooperative process, in which the species, [IrH3(κ2-P,N-6-DCyPon)(COD)] (2), was spectroscopically characterized, where 1 reacts with two equivalents of H2.

AB - The synthesis, characterization and application of a new complex, [Ir(κ2-P,N-6-DCyPon*)(COD)] (1), where 6-DCyPon* is the anionic species, 6-dicyclohexylphosphino-2-oxo-pyridinide, is reported herein. Complex 1 was found to be an active catalyst in the hydrogenation of CO2 at room temperature. The ligand, 6-DCyPon*, is derived via deprotonation of a novel pro-ligand, 6-DCyPon (6-dicyclohexylphosphino-2-pyridone) during the synthesis of 1. The ligand is shown to participate within the reversible hydrogenation of 1, via a cooperative process, in which the species, [IrH3(κ2-P,N-6-DCyPon)(COD)] (2), was spectroscopically characterized, where 1 reacts with two equivalents of H2.

KW - Carbon Dioxide

KW - Hydrogenation

KW - Ligand Cooperation

KW - Proton Responsive Ligands

KW - Room Temperature Homogeneous Catalysis

U2 - 10.1002/cctc.202301627

DO - 10.1002/cctc.202301627

M3 - Article

SN - 1867-3880

VL - 16

JO - ChemCatChem

JF - ChemCatChem

IS - 8

M1 - e202301627

ER -

Room Temperature Hydrogenation of CO2 Utilizing a Cooperative Phosphorus Pyridone‐Based Iridium Complex

Abstract

Keywords

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