An IR spectroscopy and high resolution 1H NMR study of polyphenylacetylene microstructures

Data are given on the IR spectra of polyphenylacetylenes obtained on polymerization of phenylacetylene under the action of heat (A), WCL6 (B), Al(C2H5)3TiCl2 (C), and Co(AcAc)3Al(C2H5)3 (D). In their cis-unit content the polyphenylacetylenes studied can be arranged in the series D>C>B>A, which is in agreement with high resolution 1H NMR spectroscopy data. According to this data polymer A is constructed from trans- and cyclohexadience fragments, and polymers B and D mainly from linear cis- and trans-units.