title: Synthesis, Structure and Catalytic Activity of NHC-Ag(I) Carboxylate Complexes.
abstract: A general synthetic route was used to prepare 15 new N-heterocyclic carbene (NHC)-Ag(I) complexes bearing anionic carboxylate ligands [Ag(NHC)(O2 CR)], including a homologous series of complexes of sterically flexible ITent ligands, which permit a systematic spectroscopic and theoretical study of the structural and electronic features of these compounds. The complexes displayed a significant ligand-accelerated effect in the intramolecular cyclisation of propargylic amides to oxazolidines. The substrate scope is highly complementary to that previously achieved by NHC-Au and pyridyl-Ag(I) complexes.
authors.affiliation: Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, UK.|Department of Chemistry, National University of Singapore, 3 Science Drive, Kent Ridge Crescent, Singapore.
authors.forename: Valerie H L
authors.initials: VH
authors.lastname: Wong
authors.affiliation: KAUST Catalysis Centre, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Sai V C
authors.initials: SV
authors.lastname: Vummaleti
authors.affiliation: KAUST Catalysis Centre, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Luigi
authors.initials: L
authors.lastname: Cavallo
authors.affiliation: Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, UK.
authors.forename: Andrew J P
authors.initials: AJ
authors.lastname: White
authors.affiliation: Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.|Department of Inorganic and Physical Chemistry, Universiteit Gent, Krijgslaan 281 - S3, 9000, Ghent, Belgium.
authors.forename: Steven P
authors.initials: SP
authors.lastname: Nolan
authors.affiliation: Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, UK. mimi.hii@imperial.ac.uk.
authors.forename: King Kuok Mimi
authors.identifier: http://orcid.org/0000-0002-1163-0505
authors.initials: KK
authors.lastname: Hii
keywords: N-heterocyclic carbene; carboxylate ligands; catalysis; ligand effects; silver