Table 2 Copolymerization of heteroatom-containing α-olefins with ethylene.

Conditions: [Sc] (0.03 mmol), [Ph3C][B(C6F5)4] (0.03 mmol), monomer 1, ethylene (1 atm), toluene (50 ml) at 20°C for t hours (unless otherwise stated).


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Entry1[Sc]1/[Sc]t (hour)3Yield
(g)
Activity*Mn
(×103)
Mw/Mni.r.
(%)
Tg
(°C)§
Tm
(°C)§
11i, FG = SPhSc-3100/11.53i0.122.714.71.7673.5−8n.o.
21iSc-5100/123i0.6410.620.61.3929.0−36125
31iSc-5500/1203i1.953.357.71.9244.9−16128
41iSc-6100/153i1.117.482.41.692.6−18124
51iSc-6500/1203i3.485.831.71.9615.7−19119
61iSc-61000/1203i4.397.317.02.3838.9−14110
71r, FG = PPh2Sc-5100/10.333r1.03103.254.02.209.52133
81rSc-5500/11.53r2.9064.4ǁǁ32.510124
91b, FG = OPhSc-5100/153b0
101t, FG = CH2OPhSc-5100/10.53t1.3690.4124.92.298.7-40127
111tSc-5500/153t3.0720.589.61.9524.8−39114
121tSc-6100/153t1.7811.8154.22.713.3−31124
131tSc-6500/1203t1.222.083.02.2311.8−36119

*103 g of copolymer per mole of Sc per hour per standard pressure of ethylene.

†Determined by GPC in 1,2-dichlorobenzene at 145°C against polystyrene standard.

‡Incorporation ratio of 1, determined by 1H NMR analysis.

§Determined by differential scanning calorimetry.

ǁNo GPC signal was observed in 1,2-dichlorobenzene at 145°C probably because of oxidation (or other reaction) of the phosphine components at high temperatures inside the GPC columns.