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. 2019 May 8;11(5):836. doi: 10.3390/polym11050836

Table 2.

Cis-1,4-polymerization of isoprene by complexes 1–3/activator/AlR3 ternary systems.a

graphic file with name polymers-11-00836-i001.jpg

entry Cat. Ab AlR3 t
(h)		 T
(°C)		 Y
(%)		 Ac Microstructure (%)d Mne
(105)		 Mw/Mne Tgf
(°C)
[Al]/[Ln] [IP]/[Ln] Sol. c-1,4 t-1,4 3,4
1 3 A AliBu3 2.5 500 Tol 0.5 25 6 4 83 0 17 1 3.23 −55
2 3 B AliBu3 2.5 500 Tol 0.5 25 26 18 65 23 12 7 2.31 −52
3 3 C AliBu3 2.5 500 Tol 48 25 - - - - - - - -
4 1 A AliBu3 10 500 Tol 0.03 25 100 1135 90 1 9 7 2.26 −56
5 2 A AliBu3 10 500 Tol 1 25 51 17 90 0 10 3 3.17 −57
6 3 A AliBu3 10 500 Tol 1 25 47 16 86 0 14 1 3.26 −55
7 1 A AlMe3 10 500 Tol 2 25 76 13 94 1 5 2 2.55 −62
8 1 A AlEt3 10 500 Tol 0.08 25 99 421 92 0 8 10 1.78 −59
9 1 A AlMe3 10 500 PhCl 18 25 14 0.3 91 4 5 2 2.58 −57
10 1 A AlMe3 10 500 PhCl2 2 25 100 17 94 1 5 5 1.79 −58
11 1 A AlMe3 5 500 PhCl2 2 25 100 17 94 1 5 6 2.33 −60
12 1 A AlMe3 20 500 PhCl2 2 25 76 13 94 1 5 4 2.67 −58
13 1 A AlMe3 10 500 PhCl2 5 –10 50 3 96 0 4 10 1.80 −66
14 1 A AlMe3 10 500 PhCl2 2 0 44 7 95 1 4 7 2.10 −62
15 1 A AlMe3 10 500 PhCl2 0.5 50 100 68 93 1 6 5 2.36 −60
16 1 A AlMe3 10 500 PhCl2 0.5 70 94 64 90 3 7 2 3.71 −55
17 1 A AlMe3 10 100 PhCl2 1 25 13 0.9 94 2 4 4 2.23 −59
18 1 A AlMe3 10 300 PhCl2 1 25 51 10 95 1 4 6 2.05 −62
19 1 A AlMe3 10 800 PhCl2 0.5 25 100 109 94 3 3 5 2.10 −58
20 Scg A AlMe3 10 500 PhCl2 2 25 21 4 93 4 3 0.9 2.18 −60
21 Scg Ah AlMe3 10 500 PhCl2 2 25 89 15 94 2 4 4 3.70 −60

a Conditions unless specified otherwise: 10 μmol of Ln complex, 10 μmol of activator, 5 mL of solvent. b Activator: A = [Ph3C][B(C6F5)4]; B = [PhNHMe2][B(C6F5)4]; C = B(C6F5)3. c Activity in 103 g of polymer/(molLn h). d Determined by 1H and 13C NMR spectrum: c-1,4: cis-1,4-selectivity; t-1,4: trans-1,4-selectivity; 3,4: 3,4-selectivity. e Determined by GPC in THF at 40 °C against polystyrene standard. f Measured by DSC. g Sc = Sc(CH2SiMe3)3(THF)2. h 20 μmol of activator.