NDLI: Peptide -tethered monodentate and chelating histidylidene metal complexes: synthesis and application in catalytic hydrosilylation

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Nastri, Flavia Monney, Angèle Albrecht, Martin
Description	Author Affiliation: Monney A ( School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland.)
Abstract	The $N_{δ},N_{ε}-dimethylated$ histidinium salt (His) was tethered to oligopeptides and metallated to form Ir(III) and Rh(I) NHC complexes. Peptide -based histidylidene complexes containing only alanine , Ala–Ala–His–[M] and Ala–Ala–Ala–His–[M] were synthesised ([M] = Rh(cod)Cl , $Ir(Cp)Cl_{2}),$ as well as oligopeptide complexes featuring a potentially chelating methionine and tyrosine residue , Met–Ala–Ala–His– Rh(cod)Cl and Tyr –Ala–Ala–His– Rh(cod)Cl . Chelation of the methionine -containing histidylidene ligand was induced by halide abstraction from the rhodium centre, while tyrosine remained non-coordinating under identical conditions. High catalytic activities in hydrosilylation were achieved with all peptide -based rhodium complexes. The cationic $S_{Met},C_{His*}-bidentate$ peptide rhodium catalyst outperformed the monodentate neutral peptide complexes and constitutes one of the most efficient rhodium carbene catalysts for hydrosilylation , providing new opportunities for the use of peptides as N-heterocyclic carbene ligands in catalysis.
ISSN	14779226
Issue Number	16
Volume Number	42
e-ISSN	13645447
Journal	Dalton Trans.
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2013-04-28
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Coordination Complexes Chemistry Histidine Iridium Rhodium Silicon Amino Acid Sequence Catalysis Chelating Agents Chemical Synthesis Heterocyclic Compounds Methane Analogs & Derivatives Oligopeptides Journal Article Research Support, Non-U.S. Gov't
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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