Table 4.
Effect of electricity on the reduction products 3a and 4a.
| Entry | Electricity /F mol–1 |
Current density /mA cm–2 |
Flow rate /mL h–1 (residence time/s) |
Yield of 3a (%)b |
Yield of 4 (%)b |
|
| |||||
| 1 | 2.0 | 11.8 | 11 (3.9) | 33 | 21 |
| 2 | 2.15 | 12.7 | 11 (3.9) | 47 | 33 |
| 3 | 2.3 | 13.6 | 11 (3.9) | 37 | 37 |
| 4 | 2.5 | 14.0 | 11 (3.9) | 34 | 29 |
| 5 | 3.0 | 17.7 | 11 (3.9) | 35 | 46 |
| 6 | 2.0 | 12.7 | 12 (3.6) | 23 | 13 |
| 7 | 3.0 | 12.7 | 8 (5.4) | 31 | 26 |
aExperimental conditions: cathode, GC plate; anode, Pt plate; solvent, THF; electrode distance, 40 μm; substrate, 0.06 M benzylideneaniline (1) and 0.12 M 1,4-dibromobutane (2a); supporting electrolyte, 0.14 M n-Bu4N∙ClO4. bDetermined by HPLC.