Table 1.

Polymerization data obtained using initiators 1–3 in THF, 298 K, [LA]=1 m.

I	[I]:[iPrOH]:[LA]	t [h]	Conversion [%][d]	Mn,exp [g mol−1][e]	Mn,calcd [g mol−1]	PDI[e]	Pi[f]
1	1:500[g]	8	81	101 700	58 300	1.06	0.80
1	1:1:500	9	84	38 900	60 500	1.07	0.75
1[ac]	1:0.5:500	72	84	69 600	60 500	1.02	0.84
1[bc]	1:0.5:200	48	90	36 000	26 000	1.02	0.83
2	1:500[g]	8.25	86	53 400	61 900	1.02	0.82
2	1:350[g]	5.5	86	38 300	43 300	1.09	0.82
2	1:250[g]	3.5	86	34 900	31 000	1.02	0.84
2	1:200[g]	2.75	89	27 800	25 600	1.05	0.81
2[ac]	1:500[g]	72	75	46 300	54 000	1.01	0.89
2[bc]	1:200[g]	48	81	22 800	23 300	1.02	0.89
3[a]	1:1:500	20 s	98	57 300	70 600	1.05	0.28
3	1:2:1000	20 s	93	58 000	67 000	1.03	0.28

^[a] 0.75 m [LA].

^[b] 0.5 m [LA].

^[c] 257 K.

^[d] Determined by integration of the methine region of the ¹H NMR spectrum (LA, δ=4.98–5.08 ppm; PLA, δ=5.09–5.24 ppm).

^[e] Determined by GPC (gel permeation chromatography) in THF versus polystyrene standards (M_n values are corrected with a 0.58 factor).[11]

^[f] Determined by analysis of the homonuclear decoupled NMR spectrum according to the method first described by Coudane et al.[12]

^[g] No iPrOH added. I=initiator.