. 2022 Feb 14;2(3):731–744. doi: 10.1021/jacsau.2c00005

Table 2. Treatment of CuI, NaBPh₄, and L1 with CO₂ under Varying Reactions Conditions^a.

entry	CuI [μmol]	parameter	t [h]	¹³C NMR (C₂O₄^2–)	CE (C₂O₄^2– (?)) [%]^b
1	120	-	24	n.d.	<1
2	120	-	118	n.d.	<0.5
3	182	-	120	n.d.	<0.5
4	120	MeOH/THF (9:1)	118	n.d.	<0.5
5	124	THF	120	n.d.	<0.5
6	123	toluene	121	n.d.	<1
7	120	40 °C	114	n.d.	3
8	122	40 °C	123	n.d.	8
9	133	400–700 nm (0.09 W)	18	n.d.	<0.5
10	130	10 bar	116	n.d.	16
11	132	10 bar	116	n.d.	12

Reaction conditions: CuI/L1/NaBPh₄ (1:1:1) was utilized in degassed MeOH under constant CO₂ atmosphere, unless indicated by the varied parameter. n.d. = not detected.

Oxalate yields were calculated for signals coinciding with Na₂C₂O₄ added as internal standard after initial measurement and were found to overlap with the signal of iodide.

Table 2. Treatment of CuI, NaBPh4, and L1 with CO2 under Varying Reactions Conditionsa.

Table 2. Treatment of CuI, NaBPh₄, and L1 with CO₂ under Varying Reactions Conditions^a.