Table 4.

Copolymerization of CHO and CO₂ ^a

Entry	[PPN]Cl/complex 1	[CHO]/[complex 1]	Time (h)	[CHO] (mol l−1)	Temperature (°C)	Yieldb	TOFc (h−1)	Selectivityd (% PPC)	M n e (kg mol−1)	PDIe
1	0	1,000	10	50	80	Trace	–	–	–	–
2	0.5	1,000	10	50	80	10.4	12.2	99	10.3	1.2
3	1	1,000	10	50	80	48.2	48.7	99	38.7	1.2
4	2	1,000	10	50	80	Trace	—	—	—	—
5	1	1,000	10	50	60	25.6	25.6	>99	21.6	1.2
6	1	1,000	10	50	100	48.0	52.2	92	37.1	1.4
7	1	1,000	10	50	120	46.3	54.5	85	33.9	1.5
8	1	200	10	50	80	85.6	17.3	99	14.9	1.1
9	1	800	10	50	80	56.7	45.8	99	35.6	1.2
10	1	1,200	10	50	80	39.4	47.8	99	37.7	1.2
11	1	1,000	10	30	80	27.4	27.7	99	23.1	1.3
12	1	1,000	10	40	80	39.6	40.2	99	30.1	1.2
13	1	1,000	10	60	80	43.9	46.2	95	35.7	1.3
14	1	1,000	5	50	80	29.2	58.4	99	23.8	1.2
15	1	1,000	20	50	80	70.7	36.1	98	57.8	1.3
16	1	1,000	40	50	80	85.2	22.2	96	71.8	1.5

^aCopolymerizations run in neat cyclohexene oxide (CHO) with [Co]/[PPNCl] = 1:1 at 1.5 MPa of CO₂ in 1,4-dioxane (7 ml)

^bBased on isolated poly(cyclohexene carbonate) yield

^cTurnover frequency: mol CHO mol Co⁻¹ h⁻¹

^dDetermined by ¹H NMR spectroscopy (CDCl₃, 300 MHz)

^eDetermined by gel permeation chromatography calibrated with polystyrene standards in tetrahydrofuran at 40 °C