Table 8: Effect of catalyst amount on the catalytic activity of benzyl alcohol oxidation using Cr(III) complexes at optimum conditions.
Catalyst | Catalyst (mmol) | Yield (%)a | Conversion (%) | Selectivity (%) | |||
BAb | BZc | Side products | R | ||||
CrLA1 | 0.02 | 93 | — | — | 7 | 93 | 100 |
0.05 | 65 | 32 | — | 3 | 97 | 67 | 0.10 | 45 | 35 | 20 | — | 100 | 45 |
CrLA2 | 0.02 | 85 | — | — | — | 85 | 100 |
0.05 | 51 | 37 | — | 12 | 88 | 67 | |
0.10 | 41 | 33 | 19 | 7 | 93 | 47 | |
CrLA3 | 0.02 | 75 | — | — | 25 | 75 | 100 |
0.05 | 48 | 21 | 2 | 21 | 79 | 61 | |
0.10 | 37 | 28 | 20 | 15 | 85 | 44 | |
aThe oxidation of benzyl alcohol (BZ) (1.0 mmol) catalyzed by Cr(III) complexex with aqueous H2O2 (3.00 mL) in 10 mL acetonitrile for 4 h at 80 °C. bThe yield based on GC results, selectivity percentage of the target oxide product BA. cThe other side products are mainly of BZ. |