Dossier: Special Issue in Tribute to Yves Chauvin
Open Access

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.


Toluene as solvent.


Chlorobenzene as solvent.


Selectivity into metathesis products decreases to 50%.


The use of a longer activation time was necessary (Tab. 2 below).

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