ROP of r-LA catalysed by the Li complexes.
| Run | Catalyst | r-LA : Li | T (°C) | Time (h) | Conversiona (%) | M n b , c | M ncalc d | PDIb | Pre |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 100 : 1 | 150 | 24 | 57 | 17 340 | 8210 | 1.73 | 0.91 |
| 2 | 2 | 100 : 1 | 18 | Liquid oligomers | |||||
| 3 | 3 | 100 : 1 | 25 | nd | 3600 | nd | nd | ||
| 4 | 5 | 100 : 1 | 69 | Liquid oligomers | |||||
| 5 | 6 | 100 : 1 | 87 | 18 470 | 12 530 | 1.72 | 0.90 | ||
| 6 | 7 | 100 : 1 | 18 | nd | 1150 | nd | nd | ||
| 7 | 8 | 100 : 1 | 57 | 22 650 | 8210 | 1.71 | 0.88 | ||
| 8 | 9 | 100 : 1 | 66 | Liquid oligomers |
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
Determined 2D J-resolved 1H NMR spectroscopy.