Transition metal complexes of click-derived 1,2,3-triazoles as catalysts in various transformations: An overview and recent developments

•Recent advances in 1,2,3-triazole-ligated complexes and their coordination behaviour are discussed.•Their utility as catalyst precursors in various transformations are discussed and classified according to the central metal atom.•The influence of coordination environment on catalytic performance is analysed.•Structure-activity relationships are discussed in the context of rational catalyst design.