ROMP of non-symmetric norbornadiene diesters and the characterization of the polynorbornadienes.
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| Entry | Diester | R | Yielda (%) | M calcd (kDa) | M n (GPC) (kDa) | M w/Mnb | Trans contentc (%) | T g (°C) | T 5 d (°C) |
| 1 | 7 | Me | 68 | 3.6 | 7.11 | 1.08 | 53 | 121 | 231 |
| 2 | 8 | Et | 62 | 3.9 | 5.96 | 1.07 | 51 | 114 | 235 |
| 3 | 9 | n Pr | 58 | 4.0 | 5.07 | 1.05 | 47 | 107 | 236 |
| 4 | 10 | iPr | 57 | 4.1 | 4.89 | 1.09 | 45 | 109 | 182 |
| 5 | 11 | n Bu | 49 | 4.3 | 2.73 | 1.09 | 45 | 96 | 162 |
a
Isolated yield after precipitation.
b
Values of Mw/Mn determined by GPC with polystyrene standards.
c
Determined by 1H NMR.
d
Temperature at 5% weight loss.