Synthesis, Characterization and Luminescence Studies of Trinuclear Rhenium–Cobalt Mixed-Metal Alkynyl Complexes Containing a Tetrahedral Co2C2Cluster Unit

Abstract

The reaction of rhenium(I) diynyl complexes [Re(CO)3(N–N)(C≡C--C≡CH)] [N–N = tBu2bpy (1), bpy (2)] with Co2(CO)8 in THF yielded a new class of luminescent trinuclear rhenium–cobalt mixed-metal alkynyl complexes, [Co2{μ-HC2C≡C[Re(CO)3(N–N)]}(CO)6] [N–N = tBu2bpy (3), bpy (4)]. Their luminescence and electrochemical properties have also been studied.