Key factors in pincer ligand design
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https://doi.org/10.1039/C7CS00693D |
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Title
Key factors in pincer ligand designDate
2018Publisher
Royal Society of ChemistryISSN
0306-0012; 1460-4744Bibliographic citation
PERIS, Eduardo; CRABTREE, Robert H. Key factors in pincer ligand design. Chemical Society Reviews, 2018, vol. 47, no 6, p. 1959-1968.Type
info:eu-repo/semantics/articlePublisher version
https://pubs.rsc.org/en/content/articlehtml/2018/cs/c7cs00693dVersion
info:eu-repo/semantics/publishedVersionSubject
Abstract
Pincers, tridentate ligands that prefer a meridional geometry, are a rising class because of their distinctive combination of properties. They permit a good level of control on the nature of the coordination sphere ... [+]
Pincers, tridentate ligands that prefer a meridional geometry, are a rising class because of their distinctive combination of properties. They permit a good level of control on the nature of the coordination sphere by holding the donor groups in a predictable arrangement. Some groups, such as an aryl or a pyridine, that would normally be easily lost as monodentate ligands, become reliably coordinated, especially if they form the central donor unit of the three. Many pincer complexes show exceptional thermal stability, a property that is particularly prized in homogeneous catalysis where they can permit high temperature operation. The connectors between the three donor groups are often rigid, enforcing a strict mer geometry but flexible linkers permit fac binding and even fluxionality between the two forms. Rigid pincers can make good ligands for asymmetric catalysis—if the wingtip groups cannot easily rotate they may instead maintain a geometry in which suitable substituents project into the active site area of the catalyst where they help enantio-differentiation of the relevant transition states. Examples have been selected to illustrate these and other properties of this promising ligand class. [-]
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Chemical Society Reviews, 2018, vol. 47, no 6Investigation project
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