V. D. Toncheva, R. S. Velichkova, I. M. Panayotov, L. P. Markova
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NMR study of 9-anthranylmethyl hexafluorophosphate. Polymerization of styrene monomers†
The primary carbenium salt 9-anihranylmethyl hexafluorophosphate is characterized by 1H- and 13C-NMR spectroscopy. The results show that in the temperature range −60°-15°C the initiator exists as a classical carbenium ion and a protonated anthracenium ion. At higher temperatures the reactions of self-alkylation and disproportionation proceed, giving bianthracenes, hydroanthracenes, and other dimer forms.
The polymerization of α-methylstyrene and p-methoxystyrene, initiated by 9-anthranylmethyl hexafluorophosphate, is investigated. The mechanism of initiation, the stereochemical configuration, and the end groups of the polymer chains are determined.
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