Luminescent rhenium(I) carbon wires: Synthesis, photophysics, and electrochemistry. X-ray crystal structure of [Re((t)Bu(2)bpy)(CO)(3)(C CC C)Re((t)Bu(2)bpy)(CO)(3)]

[Re((t)Bu(2)bpy)(CO)(3)(C=CC=C)Re((t)Bu(2)bpy)(CO)(3)], which consists of an 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 these 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 crystal structure of [Re((t)Bu(2)bpy)(CO)(3)(C=CC=C)Re((t)Bu(2)bpy)(CO)(3)] has been determined.