Table 1.

Selected data to show the performance of the rac‐lactide polymerization catalysed by 21–28.

Entry	Cat.	[Cat.]0/[rac‐La]0/[BnOH]0	t [min]	Conversion [%]	M n,obs [g mol−1]	M n,calc [g mol−1]	P m	T [°C]	Solvent
1	21	1:100:1	2	93	12 800	13 500	0.72	RT	toluene
2	22	1:100:1	2	99	11 600	14 400	0.73	RT	toluene
3	23	1:100:1	1.5	99	13 500	14 400	0.65	RT	toluene
4	24	1:100:1	5	99	14 400	14 400	0.72	RT	toluene
5	25	1:100:1	3	99	17 200	14 400	0.72	RT	toluene
6	26	1:100:1	2	85	12 700	12 300	0.67	RT	toluene
7	27	1:100:1	2	92	13 300	13 400	0.66	RT	toluene
8	28	1:100:1	5	99	14 100	14 400	0.67	RT	toluene
9	21	1:100:1	30	68	7200	9900	0.70	RT	THF
10	21	1:200:1	16	93	26 500	26 900	0.94	−70	toluene