ONO pincer type binuclear Pd(II) complex: Synthesis, crystal structure and catalytic utilization of the resulting organopalladium complex in catalytic copper-free Sonogashira coupling reaction

•A new binuclear palladium (II)-ONO pincer type complex.•The catalytic activity towards the copper-free Sonogashira cross coupling reaction.•Good reusability and low catalyst loading for the catalytic system.

New binuclear palladium (II) complex featuring ONO pincer type hydrazone ligand was synthesized and characterized by spectroscopic and single-crystal XRD analysis. This complex showed excellent catalytic activity towards the copper-free Sonogashira cross coupling reaction. The main advantages over previous methodologies include low catalyst loading, less problematic reaction media (H2O–DMSO) and reusability in homogenous systems for optimal performance.

Graphical abstractNew binuclear palladium (II) complex featuring ONO pincer type hydrazone ligand was synthesized and characterized by spectroscopic and single-crystal XRD analysis. This complex showed strong performance in copper-free Sonogashira coupling reaction between aryl halides and phenyl acetylene.Figure optionsDownload full-size imageDownload as PowerPoint slide