“Click” Chemistry in Metal Coordination Spheres: Copper(I)-Catalyzed 3+2 Cycloadditions of Benzyl Azide and Platinum Polyynyl Complexes trans-(C₆F₅)(p-tol₃P)₂Pt(C≡C)nH (n = 2−6)

Benzyl azide and the terminal polyynyl complexes trans -(C 6 F 5 )( p -tol 3 P) 2 Pt(C≡C) n H ( n = 2−6) undergo 3+2 “click” cycloadditions in the presence of CuSO 4 /ascorbic acid to give the 1,2,3-triazoles trans -(C 6 F 5 )( p -tol 3 P) 2 Pt(C≡C) n −1 C═CHN(CH 2 C 6 H 5 )N═N, four of which are structurally characterized.