Results of the polymerization of phenylacetylene (1) with a Rh-based multicomponent catalyst system using initiator Aa.
| Run | Base | [Rh]/([A]/3) | Polymer | ||
|---|---|---|---|---|---|
| Yieldb (%) | M n × 10−4c | M w/Mnc | |||
| 1 | 50% KOH | 1.5 | 65 | — | — |
| 2 | 10% KOH | 1.5 | 85 | 1.4 | 1.03 |
| 3 | 10% KOH | 2.0 | 92 | 1.3 | 1.05 |
a
Reaction conditions: A (0.10 mmol), [Rh(nbd)Cl]2 (0.05 mmol (runs 1 and 2), 0.067 mmol (run 3)), DPA (0.15 mmol (runs 1 and 2), 0.2 mmol (run 3)), in THF (0.2 mL) at 30 °C (run 1) or 0 °C (runs 2 and 3) for 10 min, then phenylacetylene (1) (1.7 mmol) and PPh3 (0.15 mmol (runs 1 and 2), 0.2 mmol (run 3)) in THF (3.8 mL) at 30 °C for 1 h.
b
Methanol-insoluble part.
c
Determined by SEC using three columns (TSKgel G4000HXL + G3000HXL + G3000HXL) connected in series based on polystyrene standards (THF, 40 °C).