Polyacetylenes, with pendant radical

Fig. 12 Example polyacetylenes with pendant radical groups, with a computed geometry example of pendant twisting that severely limits exchange along the main chain.

Polyacetylene-based pendant polyradicals 14 were reported in late 1980s and early 1990s, as summarized in a recent review by Nishide and Kaneko (42). In polyacetylenes, connectivity of non-Kekule r-system compatible with ferromagnetic coupling may be obtained by the attachment of conjugated pendant radical at the every other carbon of the polyene backbone (Fig. 6). Molecular... 

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