SynopsisThe '%i-NMR spectra are reported for poly(methylphenylsilylene), 1, poly(l,l,2-trimethyl-2phenyldisilene) 2, two samples of poly(dimethylsily1ene-co-phenylmethylsilylene), 3a and 3b, and poly(phenylmethylsilylene-co-n-hexylmethylsilylene), 4. The spectra of 3 4 3b, and 4 indicate that these polymers contain blocklike regions with considerable segregation of RMeSi and PhMeSi groups. The spectrum of 2 shows no evidence for stereospecific or regiaspecific polymerization. The preparation of 2 from 1,1,2-trimethyl-2-phenyldichlorosilane is also described.

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