. 2016 Nov 17;8(3):1876–1882. doi: 10.1039/c6sc04477h

Table 1. Coupling reaction of CO₂ and epoxides with catalyst 1 ^a .


Entry	Epoxide	[Epoxide]: [(1)]	p [bar]	T [°C]	Time [h]	Yield [%]	TON ^b	TOF ^c [h^–1]	Selectivity (NMR) ^d [PC] : [CC] : [PE]	Terpolymer composition (NMR) ^e [PC] : [PPC] : [CC]	M _n (PDI) ^f ^, ^g [kg mol^–1]
1	CHO	2000	40	50	0.2	57	1150	5520	93 : 0 : 7	—	134 (1.7) ^g
2	CHO	4000	40	50	0.58	50	2010	3440	91 : 0 : 9	—	135 (1.4) ^g
3	PO ^h	1000	30	25	20	56	560	30	62 : 38 : 0	—	98 (1.4) ^f
4	PO ^h	1000	30	50	1	12	120	120	3 : 94 : 3	—	—
5	PO	500	30	25	3	32	160	53	78 : 22 : 0	—	21 (1.2) ^f
6	SO	1000	30	25	20	51	510	26	66 : 34 : 0	—	20 (1.3) ^g
7	OO	1000	40	40	24	92	920	38	33 : 66 : 0	—	107 (1.7) ^f
8	ECH	1000	30	40	16	44	440	28	0 : 100 : 0	—	—
9	LO	250	30	40	16	73	90	180	100 : 0 : 0	—	33 (1.9) ^f
10	LO/PO	250/600	30	25	6	40	330	55	98 : 2 : 0	51 : 47 : 2	95 (1.4) ^f
11	CHO/PO	500/500	30	25	14	65	650	46	99 : 1 : 0	59 : 40 : 1	272 (1.3) ^f

^aReaction scheme refers to copolymerisation of PO, SO, OO, ECH with CO₂ (PLimC, PCHC and terpolymers look different).

^bThe turnover number (TON) is the ratio of the number of moles of epoxide consumed to the number of moles of catalyst.

^cTOF is TON/time.

^d[PC] : [CC] : [PE], assigned by the relative integrals of the signals for polycarbonate (PC), cyclic carbonate (CC) and polyether (PE).

^e[PC] : [PPC] : [CC], assigned by the relative signals for (a) entry 10: PLimC : PPC : cPC (b) entry 11: PCHC : PPC : cPC before precipitation.

^fDetermined by GPC, calibrated with polystyrene standards in chloroform.

^gDetermined by GPC, calibrated with polystyrene standards in thf.

^h5.0 mL toluene.

Table 1. Coupling reaction of CO2 and epoxides with catalyst 1 a .