ROP of δ-VL catalysed by the Li complexes under solvent-free conditions.
| Run | Catalyst | δ-VL : Li | T (°C) | Time (h) | Conversiona (%) | M n b , c | M ncalc d | PDIb |
|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 100 : 1 | 130 | 24 | 18 | nd | 1800 | nd |
| 2 | 2 | 24 | 10 | 1320 | 1000 | 1.29 | ||
| 3 | 5 | 10 mine | 58 | 30 100 | 5800 | 2.12 | ||
| 4 | 6 | 12 | >99 | 2990 | 9900 | 1.57 | ||
| 5 | 7 | 1e | 46 | 16 360 | 4600 | 1.29 | ||
| 6 | 8 | 30 mine | 60 | 21 680 | 6000 | 1.52 | ||
| 7 | 9 | 12e | 64 | 31 650 | 6400 | 2.08 |
a
Determined by 1H NMR spectroscopy on crude reaction mixture.
b
From GPC.
c
Values corrected considering Mark–Houwink factor (0.56) from polystyrene standards in THF.
d
Calculated from ([Monomer]0/[Cat.]0) × conv. (%) × monomer molecular weight.
e
Stirring stopped due to the polymer formation.