Fig. 2 | Nature Communications

Fig. 2

From: Photoresponsive spiro-polymers generated in situ by C–H-activated polyspiroannulation

Fig. 2

Structural characterization and analysis of the polymeric products. a Synthetic route to model compound 4. b–e 1H NMR spectra of b monomer 1a, c monomer 2a, d model compound 4, and e P1a/2a in CD2Cl2. f–i 13C NMR spectra of f monomer 1a, g monomer 2a, h model compound 4, and i P1a/2a in CD2Cl2. j 13C NMR spectra in CD2Cl2 (left) and IR spectra (right) of monomer 2a and P1a/2a generated from polymerizations at different monomer ratios (sample taken from Table 1, entries 1–5, respectively).

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