title: CSC-pincer versus pseudo-pincer complexes of palladium(II): a comparative study on complexation and catalytic activities of NHC complexes.
abstract: Three thioether bridged diimidazolium dibromides with different steric and electronic properties have been synthesized as precursors to carbene-based CSC pincer ligands. Palladation afforded CSC Pd(II) pincer complexes for bulky and electron rich ligand systems, whereas the least donating ligand led to the formation of a pseudo-pincer complex. All complexes have been fully characterized by multinuclei NMR spectroscopies, ESI mass spectrometry and X-ray diffraction analysis. The catalytic activities of pincer versus pseudo-pincer complexes have been compared in the intermolecular hydroamination of alkynes with anilines as well.
authors.affiliation: Department of Chemistry, 3 Science Drive 3, National University of Singapore, Singapore 117543.
authors.forename: Dan
authors.initials: D
authors.lastname: Yuan
authors.forename: Haoyun
authors.initials: H
authors.lastname: Tang
authors.forename: Linfei
authors.initials: L
authors.lastname: Xiao
authors.forename: Han Vinh
authors.initials: HV
authors.lastname: Huynh