PDF《Supporting Information》

150 °C in spectrophotometric grade 1,2,4-trichlorobenzene (TCB), stabilized with BHT (0.5 g BHT /

4 L solvent). Molecular weights were calculated by using a universal calibration from narrow polystyrene standards in the molecular weight range of

580 to 7.5 million g/mol. Mark-Houwink parameters of a = 0.7 and k = 47.7 were utilized to correct for polyethylene. Polymer melting points were measured on a TA Instruments differential scanning calorimeter (model DSC 2920) at a rate of

10 °C/min for two cycles in the temperature range of 25-200 °C. S3 of

23 Figure S-1. GPC traces of polymers produced using complexes

3 and 4. Additional information related to one included in Table

1 of the manuscript. Synthesis and Characterization of Compounds. 3-Cyano-2-(phenyl)aminopent-2-en-4-(phenyl)imine (2) n-BuLi (5.7mL, 1.6M, 9.0mmol) was added drop-wise to a stirred solution of 2- (phenyl)aminopent-2-en-4-(phenyl)imine (1) [S. G. McGeachin, Canadian Journal of Chemistry (1968), 46(11), 1903-1912] in THF (30 mL) (1.6 g, 6.5 mmol) at -78 °C. The reaction was allowed to warm to room temperature over

2 hours to afford the lithium salt. The resulting yellow suspension was then cooled to -78 °C, and p- toluenesulfonylcyanide (1.4 g, 7.7 mmol) in THF (20 mL) was added. The reaction mixture was again allowed to warm to room temperature over

24 hours. From this mixture, all volatiles were removed under vacuum, and the residue was dissolved in S4 of

23 CH2Cl2 (50 mL). This was washed with Brine (2 *

100 mL), dried over Na2SO4 and filtered. The solvent was subsequently removed under vacuum to yield light brown solid. Precipitation from methanol provided light yellow solid of 3-cyano-2- (phenyl)aminopent-2-en-4-(phenyl)imine (2) in

70 % yield (1.23g. 4.5mmol).

1 H NMR (400 MHz, CD2Cl2,

298 K): δ/ppm = 14.42 (s, 1H, NH), 7.36 (t, 4H, m-Ph), 7.18 (t, 2H, p-Ph), 6.99 (d, 4H, o-Ph), 2.27 (s, 6H, N=C MePh ).

13 C{1 H} NMR (100 MHz, CD2Cl2,

298 K): δ/ppm = 165.8 (C=NPh ), 144.1 (i-Ph) , 129.6 (m- Ph), 125.7 (p-Ph), 123.9 (o-Ph), 122.2 (C≡N), 82.3 (CCN ), 19.9 ........