Polyurethane Metal Catalysts: Efficiency Relationship to Ligand Structure Properties Abstract: Polyurethane (PU) synthesis is a cornerstone of modern polymer chemistry, with applications spanning coatings, adhesives, foams, and elastomers. Metal catalysts, particularly those based on tin, bismuth, and zinc, play a crucial role in accelerating the isocyanate-polyol reaction, dictating the final properties of the PU product....