Table 1
Activity of the MoCl2(NO)2L2/AlEt3/PhOH for 4-nonyne metathesis
Entry | 1 | 2 | 3 | 4 | 5 | 6 |
---|---|---|---|---|---|---|
L | Pyridine | NEt3 | PPh3 | P(OPh)3 | OPPh3 | None |
TOF (h−1)a | 3300 | 4400 | 3950 | 3700c | 4750 | 3600d |
TOF (h−1)b | 2150 | 3000 | 3650 | 2400c | 3800 | 3600d |
Conditions: T = 110°C; [C≡C]/[Mo] = 100; [AlEt3]/[Mo] = 6; PhOH/Mo = 100.
d
The use of a longer activation time was necessary (Tab. 2 below).