| Entry | Cobalt salt (mol%) | Yield/% | Selectivity | |
| 2 | 1 | 2/1 | ||
| 1 | Co(ClO4)2∙6H2O (10) | 8.2 | 40.1 | 16.9/83.1 |
| 2 | Co(ClO4)2∙6H2O (25) | 39.1 | 18.0 | 68.5/31.5 |
| 3 | Co(ClO4)2∙6H2O (50) | 52.4 | 7.8 | 87.0/13.0 |
| 4 | Co(ClO4)2∙6H2O (75) | 61.7 | 4.0 | 93.9/6.1 |
| 5 | Co(ClO4)2∙6H2O (100) | 71.5 | 0.0 | 100.0/0.0 |
| 6 | Co(BF4)2∙6H2O (10) | 10.3 | 32.0 | 24.3/75.7 |
| 7 | Co(BF4)2∙6H2O (25) | 44.8 | 12.2 | 78.6/21.4 |
| 8 | Co(BF4)2∙6H2O (50) | 62.3 | 7.4 | 89.4/10.6 |
| 9 | Co(BF4)2∙6H2O (75) | 66.1 | 0.0 | 92.4/7.6 |
| 10 | Co(BF4)2∙6H2O (100) | 75.8 | 0.0 | 100.0/0.0 |