Synthesis and Reactions of Titanacycle-Containing Polymers

Thiophene-containing polymers (27) are likewise produced by the reaction of the titanacyclopentadiene-containing polymers (22) with sulfur monochloride under mild conditions (scheme 15). The yield of the soluble fraction was a little lower (-50%) because the produced polymers are partially insoluble in organic solvents. The brown powdery polymers thus obtained exhibit a substantial bathochromic shift in flie UV-Vis and photoluminescence spectra compared to those of the corresponding model compounds, 2,5-diarylthiophenes. 

The titanacyclopentadiene-containing polymers (22) can be converted into Jt-conjugated phosphole-containing polymers (28) by the reaction with dichlorophenyl-phosphine (scheme 16). Similar to the case of the above-mentioned conversion reaction into thiophene-containing polymers, the produced polymers are partially 

---