Table 2.

Coupling of CO₂ and various epoxides promoted by complexes 1 and 2.^a

Entry	Catalyst	R	Conversionb (%)	Yieldc (%)
1	1	Ph	100	62
2	1	CH2OPh	100	78
3	1	p-ClPh	100	95
4	1	Bu	100	80
5	1	Et	100	78
6	1	Me	100	52
7	1	CH2Cl	100	82
8	1	CH2OH	100	85
9	2	Ph	100	80
10	2	CH2OPh	64	56
11	2	p-ClPh	99	84
12	2	Bu	100	60
13	2	Et	100	71
14	2	Me	100	88
15	2	CH2Cl	100	80
16	2	CH2OH	100	76

^aReaction conditions for catalyst 1: solvent free, 10 bar pressure of CO₂, 35 °C, 24 h; for catalyst 2: solvent free, 10 bar pressure of CO₂, 25 °C, 24 h. ^bDetermined by ¹H NMR spectroscopy of the unpurified product. ^cAfter purification by column chromatography.