Table 4.

Rhodium-catalyzed reductive carbonylation of iodobenzene with CO and H₂ to afford benzaldehyde: effects of dosage of RhCl₃·3H₂O and PPh₃^a.

Entry	RhCl3·3H2O [mol %]	PPh3 [mol %]	Conversion [%]b	Yield [%]b
1	1	2	35	28
2	1	3	51	47
3	1	4	78	74
4	1	5	72	70
5	2	4	34	31
6	2	6	65	62
7	2	8	92	88
8	2	10	88	84
9	2.5	5	47	42
10	2.5	7.5	81	73
11	2.5	10	100	97
12	2.5	12.5	100	92
13	3	12	100	97
14	4	16	100	97
15	5	20	100	97

^aStandard conditions: PhI (1 mmol), RhCl₃·3H₂O, PPh₃, Et₃N (1.2 mmol), DMA (2 mL), CO/H₂ (5 bar:5 bar), 90 °C, 12 h. ^bDetermined by GC using dodecane as an internal standard.