Table 1.
rac‐LA polymerization using zinc–HMDS complexes 1–3.
| Cat [mol %] | Time [s] | Conv [%][a] | M n(exp) [kg⋅mol−1][b] | Ð[b] | M n(cld) [kg⋅mol−1][c] | TOF [h−1][d] |
|---|---|---|---|---|---|---|
| 1 (0.1) | 53 | 60 | 316 | 1.40 | 43 | 20 300 |
| 2 (0.1) | 30 | 73 | 135 | 1.30 | 57 | 45 000 |
| 3 (0.1) | 140 | 56 | 144 | 1.03 | 40 | 14 300 |
| A [e] (0.5) | 4800 | 78 | 9.6 | 1.10 | 11 | 120 |
Polymerization conditions as per Figure 1(LHS). [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] Mn(cld)=(conversion/100)×loading/[number of metal centers]×RMM(LA). [d] TOF=(conversion/100)×loading/(time×number of metal centers). [e] A correspond to [Zn2 LEt(Et)2] 2 equiv. of IPA.