The syntheses, 31P{1H} NMR spectra and cyclic voltammetry of trinuclear [Pd2M(μ3-Se)2(dppe)3]2+ {M=Ni or Pt; dppe=1,2-bis(diphenylphoshino)ethane} and pentanuclear [M′{Pd2(μ3-Se)2(dppe)2}2]2+ (M′=Ni, Pd or Pt) clusters with selenido bridges

Trinuclear [Pd2M(μ3-Se)2(dppe)3]2+ (M=Ni or Pt) and pentanuclear [M′{Pd2(μ3-Se)2(dppe)2}2]2+ (M′=Ni, Pd or Pt) clusters have been prepared using a metalloligand [Pd2(μ-Se)2(dppe)2] and characterized by 31P{1H} NMR spectroscopy and cyclic voltammetry. [Pd2Ni(μ3-Se)2(dppe)3]2+ gives two chemically reversible couples, [Pd2Pt(μ3-Se)2(dppe)3]2+ exhibits one chemically reversible couple and pentanuclear clusters show three couples in each cyclic voltammogram of the reduction process at 255 K. The redox behavior of the clusters is discussed.