Phosphole-Triazole Hybrids: A Facile Synthesis and Complexation with Pd(II) and Pt(II) Salts

The copper-promoted Huisgen reaction of α-ethynylphosphole P-oxides with aryl azides affords α-(1-aryl-1,2,3-triazol-4-yl)phospholes in high yield. The α-(1-phenyl-1,2,3-triazol-4-yl)phosphole exhibits different coordination behavior in the complexation with MCl2(cod) (M = Pd, Pt). It has been revealed that P,N-coordination to PdCl2 dramatically changes the optical properties of the newly constructed phosphole-triazole hybrid π-system.