title: Pincer-type di(1,2,4-triazolin-5-ylidene)Pd(II) complexes and their catalytic activities towards Cu- and amine-free Sonogashira reaction.
abstract: Pd(II) complexes [PdBr(A-κ(3)CNC)]Br (1) and [PdBr(B-κ(3)CNC)]Br (2) with new CNC pincer-type ligands derived from 1,2,4-triazolin-5-ylidenes have been synthesized and characterized by multinuclei NMR spectroscopies, ESI mass spectrometry and X-ray diffraction analysis. The more soluble complex 1 proved to be an efficient pre-catalyst in copper- and amine-free Sonogashira reaction with high turnover numbers. The potential for recycling of the catalyst was also demonstrated.
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore, Singapore. chmhhv@nus.edu.sg
authors.forename: Han Vinh
authors.initials: HV
authors.lastname: Huynh
authors.forename: Chen-Shiang
authors.initials: CS
authors.lastname: Lee