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[[File:MachoIr.png|thumb|right|An iridium MACHO catalyst.]]
[[File:MachoRu.png|thumb|right|A ruthenium MACHO catalyst.]]
In [[homogeneous catalysis]], '''MACHO catalysts''' are [[metal complex]]es containing MACHO ligands, which are of the type HN(CH<sub>2</sub>CH<sub>2</sub>PR<sub>2</sub>)<sub>2</sub>, where R is typically phenyl or isopropyl. Complexes with ruthenium(II) and iridium(III) have received much attention for their ability to hydrogenate polar substrates such as esters and even [[carbon dioxide]].<ref></ref> The catalysts appear to operate via intermediates where the amine proton and the [[metal hydride|hydride ligand]] both interact with the substrate.<ref></ref><ref></ref> Numerous analogues of MACHO ligands and related complexes have been described and even commercialized.<ref name=Gordon></ref>
==References==
<references />
[[File:MachoRu.png|thumb|right|A ruthenium MACHO catalyst.]]
In [[homogeneous catalysis]], '''MACHO catalysts''' are [[metal complex]]es containing MACHO ligands, which are of the type HN(CH<sub>2</sub>CH<sub>2</sub>PR<sub>2</sub>)<sub>2</sub>, where R is typically phenyl or isopropyl. Complexes with ruthenium(II) and iridium(III) have received much attention for their ability to hydrogenate polar substrates such as esters and even [[carbon dioxide]].<ref></ref> The catalysts appear to operate via intermediates where the amine proton and the [[metal hydride|hydride ligand]] both interact with the substrate.<ref></ref><ref></ref> Numerous analogues of MACHO ligands and related complexes have been described and even commercialized.<ref name=Gordon></ref>
==References==
<references />
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