| Entry |
Brønsted acid (mol%) |
Cobalt salt |
Time/h |
Yield/% |
|
| 2 |
1 |
||||
| 1 |
PhSO3H(10) |
- |
2 |
4.9 |
53.1 |
| 2 |
CH3SO3H(10) |
- |
2 |
0.0 |
47.9 |
| 3 |
CF3SO3H(10) |
- |
2 |
5.7 |
53.5 |
| 4 |
H3PO4(10) |
- |
2 |
0.0 |
58.8 |
| 5 |
H2SO4(10) |
- |
2 |
0.0 |
56.5 |
| 6 |
H2SO4(20) |
- |
2 |
3.3 |
56.1 |
| 7 |
|
CoCl2 |
2 |
0.0 |
83.4 |
| 8 |
- |
Co(NO3)2∙6H2O |
2 |
7.8 |
72.6 |
| 9 |
- |
Co(ClO4)2∙6H2O |
2 |
8.2 |
40.1 |
| 10 |
- |
Co(BF4)2∙6H2O |
2 |
10.3 |
32.0 |
| 11 |
PhSO3H(10) |
CoCl2 |
2 |
47.7 |
40.3 |
| 12 |
PhSO3H(10) |
Co(NO3)2∙6H2O |
2 |
22.5 |
29.4 |
| 13 |
PhSO3H(10) |
Co(ClO4)2∙6H2O |
2 |
30.5 |
26.9 |
| 14 |
PhSO3H(10) |
Co(BF4)2∙6H2O |
2 |
64.9 |
26.8 |
| 15 |
PhSO3H(10) |
Co(BF4)2∙6H2O |
4 |
88.3 |
5.5 |
| 16 |
H3PO4(10) |
Co(BF4)2∙6H2O |
2 |
26.8 |
31.6 |
| 17 |
CF3SO3H(10) |
Co(BF4)2∙6H2O |
2 |
27.9 |
20.0 |
| 18 |
CH3SO3H(10) |
Co(BF4)2∙6H2O |
2 |
45.0 |
15.2 |
| 19 |
H2SO4(10) |
Co(BF4)2∙6H2O |
2 |
12.5 |
48.3 |
| 20 |
H2SO4(20) |
Co(BF4)2∙6H2O |
2 |
56.7 |
22.5 |
| 21 |
H2SO4(10) |
Co(BF4)2∙6H2O |
24 |
69.3 |
20.2 |
| 22 |
H2SO4(20) |
Co(BF4)2∙6H2O |
24 |
86.3 |
6.6 |