The solid reaction products obtained from the reaction between α-methylstyryl sodium “living” ends in tetrahydrofuran with t-butyl chloride, at ambient temperatures, have been separated by TLC and examined by UV, IR and NMR spectroscopy. Apart from the expected elimination and substitution products, a new grouping, absorbing UV radiation at 315 nm. is found in the polymer. IR and UV data suggest that the new grouping is of a quinonoid type structure. Several mechanisms, in explanation of the overall reaction, are discussed in the light of these results.