Oligoyne bridges

In order to prepare nonsymmetrical diynes, one can use the Cadiot-Chodkiewicz reaction. It involves a haloalkyne such as a iodoalkyne or a bromoalkyne. Combined with the Glaser dimerization, this reaction provides a powerful entry to oligoyne bridging ligands and has been used extensively by Gladysz (see Figure 10) [34]. 

Scheme 1. The reaction used by Tor and co-workers to prepare oligoyne-bridged homo- and...

Table 2. Photophysical data of oligoyne-bridged dinuclear compounds. 

Figure 7. Dinuclear complexes containing oligoynes as bridging ligands.

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