Table 5. ROMP copolymerization of NBE and COE performed in the presence of catalysts 1, 2 and HGII.
| ||||||
|---|---|---|---|---|---|---|
| Entry | Catalyst | Poly(NBE)a,b [%] | Poly(COE)a,b [%] | Alternating diadsb [%] | M n c (g mol−1) | Ð c |
| 1 | 1a | 30 | 4 | 66 (54) | 6.1 × 105 | 1.9 |
| 2 | 1b | 34 | 2 | 64 (63) | 6.1 × 105 | 2.0 |
| 3 | 2a | 42 | — | 58 (58) | 6.8 × 105 | 2.4 |
| 4 | 2b | 56 | — | 44 (55) | 9.5 × 105 | 2.0 |
| 5 | HGII | 37 | 47 | 16 (20) | 2.7 × 105 | 1.8 |
a
Fractions of homopolymer sequences in the copolymer.
b
Determined using 13C NMR.
c
Determined using CHCl3 size-exclusion chromatography (SEC) calibrate utilizing polystyrene standards.