t)Bu(2)bpy)(CO)(3)(C=CC=C)Re((t)Bu(2)bpy)(CO)(3)], which consists of a
n extended linear O=C-Re-C=C-C=C-Re-C=O unit, has been synthesized by
the coupling of two [Re((t)Bu(2)bpy)(CO)(3)(C=CH)] units; both of thes
e complexes and the related [Re((t)Bu(2)bpy)(CO)(3)(C=CC6H13)] complex
are shown to exhibit rich photophysical behavior. The electrochemical
properties of these complexes have also been studied. The X-ray cryst
al structure of (t)Bu(2)bpy)(CO)(3)(C=CC=C)Re((t)Bu(2)bpy)(CO)(3)] has
been determined.