Table 2.
Selected data for the rac‐LA polymerization using 4–6 and 1–3 under immortal conditions (the complete Table can be found in Table S1).
| Cat [mol %] | Conv [%][a] | M n (exp) [kg⋅mol−1][b] | Ð[b] | M n(cld) [kg⋅mol−1][c] | TOF [h1][d] |
|---|---|---|---|---|---|
| 4 (0.1) | 48 | 50 | 1.10 | 70 | 30 |
| 5 (0.1) | 93 | 53 | 1.04 | 67 | 13 000 |
| 6 (0.1) | 97 | 49 | 1.09 | 70 | 14 000 |
| 1 (0.1) | 97 | 14 | 1.07 | 14 | 60 000 |
| 2 (0.1) | 91 | 13 | 1.03 | 13 | 50 000 |
| 3 (0.1) | 92 | 13 | 1.08 | 13 | 35 000 |
| 2 [e] (0.005) | 80 | 45 | 1.03 | 57 | 16 000 |
| 2 [f] (0.002) | 42 | 48 | 1.02 | 61 | 12 600 |
| A[ g] (0.2) | 97 | 38 | 1.10 | 28 | 600 |
| B [h] (0.1) | 99 | 100 | 1.40 | 142 | 4430 |
| C [i] (0.1) | 63 | 13 | 1.11 | 13 | 18 900 |
| D [j] (0.009) | 83 | 900 | 2.00 | 1344 | 1170 |
Polymerization conditions as per Figure 1 (LHS for 4–6 and RHS for 1–3, immortal conditions) [a] Determined by 1H NMR spectroscopy (CDCl3, 298 K). [b] Determined by SEC versus polystyrene standards, and corrected by a factor of 0.58.16 [c] M n(cld)=(conversion/100)×loading/[number of metal centers]×RMM(LA). [d] TOF=(conversion/100)×loading/(time×number of metal centers). [e] 40 equiv. of IPA per mol of catalyst. [f] 50 equiv. of IPA per mol of catalyst. [g] A=BDIZnOiPr, [rac‐LA]=0.4 m, T=20 °C in CH2Cl2. 8 [h] B=halfsalenZnEt, CH2Cl2.9 [i] C=bis(morpholinomethyl)phenoxyZnEt, 10 equiv. of IPA per mol of catalyst, T=60 °C in toluene.17 [j] D=Sn(Oct)2, T=110 °C in octanoate, neat.18