Table 1.
aPolymerization conditions: 3 μmol G3 catalyst and desired amount of DHF in THF, termination using 2 eq T1, DP (degree of polymerization) is the theoretical ratio of total amount of both monomers to the Grubbs initiator. bDetermined by 1H NMR in CDCl3. cDetermined by CHCl3 size-exclusion chromatography (SEC) calibrated using polystyrene standards. dCalculation of Mn, theo is based on alternating structures.
| |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Entry a | Diyne (Y) |
[M] (mol/L) |
Y: D | DP a | DY: DD b | Conversion b | Mn,SEC (kDa) c | Mn, theo (kDa) d | Ð c |
| 1 | M1 | 0.5 | 1: 9 | 40 | 85/15 | 82% | 15 | 6.1 | 2.12 |
| 2 | M1 | 0.5 | 1:1.2 | 40 | 97/3 | 83% | 9.1 | 6.1 | 1.38 |
| 3 | M1 | 0.1 | 1:1.2 | 40 | 98/2 | 86% | 8.2 | 6.1 | 1.24 |
| 4 | M1 | 0.05 | 1:1.2 | 40 | 99/1 | 82% | 8.5 | 6.1 | 1.24 |
| 5 | M1 | 0.1 | 1:1.2 | 100 | 99/1 | 88% | 16 | 15 | 1.45 |
| 6 | M2 | 0.1 | 1:1.2 | 100 | 99/1 | 87% | 15 | 16 | 1.38 |
| 7 | M3 | 0.1 | 1:1.2 | 100 | -- | <1% | -- | 18 | -- |
| 8 | M4 | 0.1 | 1:1.2 | 100 | 99/1 | 92% | 23 | 19 | 1.21 |
| 9 | M5 | 0.1 | 1:1.2 | 100 | -- | <1% | -- | 20 | -- |
| 10 | M4 | 0.1 | 1:1.2 | 20 | 99/1 | 93% | 4.4 | 4.1 | 1.21 |
| 11 | M4 | 0.1 | 1:1.2 | 40 | 99/1 | 93% | 11 | 8.1 | 1.22 |
| 12 | M4 | 0.1 | 1:1.2 | 200 | 99/1 | 91% | 38 | 37 | 1.45 |
| 13 | M4 | 0.1 | 1:1.2 | 400 | 99/1 | 89% | 48 | 75 | 1.61 |