Poly-yndiyl polymers

Nickel centers have been introduced into these Group 10 poly-yndiyl polymers by reactions of bis(diynyl)metal reagents with Ni(C=CH)2(PBu3)2. 

Liquid crystal polymers (LCPs) have been a source of considerable interest for some time, as they have been shown to offer particular advantages in terms of their processability and physical properties which make them attractive in a wide range of engineering applications.346 Serrano and his colleagues have reviewed metallomesogenic polymers, including the liquid crystalline properties of several of the platinum poly-yndiyl polymers described above.85,86... 

Of the various techniques routinely available, IR and 13C NMR spectroscopy usually provide the most valuable information in terms of the determination of the most appropriate valence description (A-D, Chart 1) of the carbon fragment. Mossbauer spectroscopy has also been used with good effect with iron-containing poly-carbon complexes.89 This solution-based work is complemented by a significant number of solid-state structural studies, which are described in greater detail below. Electronic spectroscopic methods, including luminescence methods, have been used to probe the electronic structures of a small number of poly-yndiyl complexes and polymers.288 315 340 342 377 380 Selected IR, 13C NMR, and UV-vis data have been given in Tables I-VIII, above. 

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