| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1254176 | Chinese Chemical Letters | 2014 | 4 Pages |
A series of N-base appended corroles and their manganese complexes were synthesized and their binding constants with three different nitrogenous ligands, triethylamine, N-methylimidazole and pyridine, were evaluated by spectroscopy. Kinetic studies indicated that the presence of appended N-donor ligands may cause a significant enhancement of the rate of oxygen atom transfers (OAT) from (oxo)manganese(V) corrole to alkene, and the stronger axial ligand binding has impact on the rate of the oxidation reaction. Turnover frequency (TOF) for the catalytic oxidation of alkenes by appended manganese corroles varies with the following ligand order: acetamido < pyridyl < imidazolyl. The influence of the external axial ligands on the catalytic epoxidation was investigated by using appended acetamido manganese corrole as catalyst, with the results revealing that N-methylimidazole gave the best enhancement on the yields of total oxidation products among the investigated nitrogenous ligands.
Graphical abstractThree novel appended manganese corroles were synthesized. The appended N-base ligands may act as axial-ligands and enhance the catalytic activity of manganese(III) corroles in the epoxidation of alkenes by iodosylbenzene.Figure optionsDownload full-size imageDownload as PowerPoint slide
