Synthesis of the Chelated Axially Chiral 1,2,3-Triazol-5-ylidene-pd(ii), Ni(II) and Ru(II) Complexes and Exploration of Bis-MIC-Pd(II) Catalyst's Application in Coupling Reaction

•Three chelated bis-1,2,3-triazol-5-ylidene Pd(II) complexes, one chelated bis-1,2,3-triazol-5-ylidene Ni(II) complex and one chelated mono-1,2,3-triazol-5-ylidene Ru(II) complex were synthesized.•Application of the chiral bis-MIC-Pd(II) complexes in Pd(II)-catalyzed suzuki–miyaura coupling reaction was explored.•A scale–up reaction and a mercury poisoning experiment have been performed.