The chemical structure of the obtained macromonomers was also confirmed by 1 H-NMR and C-NMR spectroscopy. The analysis of NMR spectra also confirmed that all of the obtained macromonomers had similar structures, consistent with our expectations based on our prior work. As a representative example, Figure presents 1 H-and C-NMR spectra of macromonomer obtained using BiHex at 2 mol% per step (PrBiHex_2). The remaining 1 H-NMR spectra for the materials synthesized with other catalysts are included in the SI (see Figure and S12).