Scheme 2. Change in Mn and Đ with respect to (a) conversion of monomera and (b) ratio of monomer to initiating species.b a[PO] : [CPMA] : [1a] : [1b] : [AdA] = 2000 : 400 : 1 : 0.9 : 2. Conversion of anhydride determined by 1H NMR analysis. Mn and Đ determined by GPC analysis in THF at 30 °C relative to polystyrene standards. b[PO] : [1a] : [1b] : [AdA] = 2000 : 1 : 0.9 : 2; ratio of [M] to [I] was changed by varying amount of anhydride. [M]/[I] = (mol anhyd.)/(mol 1b + mol AdA). All polymerizations were run to >99% conversion of anhydride as determined by 1H NMR analysis. Mn and Đ determined by GPC analysis in THF at 30 °C relative to polystyrene standards.
