Fig. 3: Stacked ¹H NMR spectra (400 MHz, CDCl₃).

a EVP monomer and b−f crude ROP mixtures obtained using the CTPB/DU8 binary catalyst at different temperatures (Supplementary Table 1, runs 1−5). The calculations of selectivity are based on the integrations for peaks at 6.91 ppm (poly(EVP_ROP)) and 7.07 ppm (Di-EVP).