Polymerization results of chiral phenylacetylenes (3R and 3S) with a Rh-based multicomponent catalyst system using initiator Aa.
| Run | Monomer | [3]/([A]/3) | Polymer | |||
|---|---|---|---|---|---|---|
| Sample code | Yieldb (%) | M n × 10−4c | M w/Mnc | |||
| 6 | 3R | 25 | A(poly-3R25)3 | 95 | 2.0 | 1.02 |
| 7 | 3S | 25 | A(poly-3S25)3 | 90 | 2.1 | 1.03 |
| 8 | 3R | 500 | A(poly-3R500)3 | 83 | 33.4 | 1.48 |
| 9 | 3S | 500 | A(poly-3S500)3 | 80 | 32.7 | 1.60 |
a
Reaction conditions: A (0.10 mmol), [Rh(nbd)Cl]2 (0.067 mmol), DPA (0.2 mmol), in THF (0.2 mL) at 0 °C for 10 min, then phenylacetylene (1) (0.85 mmol (runs 6 and 7), 17.0 mmol (runs 8 and 9)) and PPh3 (0.2 mmol) 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 (runs 6 and 7) or one column (KF-805L) (runs 8 and 9) based on polystyrene standards (THF, 40 °C).