| 초록 |
Cr(VI)-heterocyclic complex [(C9H7NH)2Cr2O7] was synthesized by the reaction between quinoline and chromium trioxide, and characterized by IR and ICP analysis. In the presence of N,N-dimethylformamide(DMF) solvent with acidic catalyst such as hydrochloric acid (HCl solution), (C9H7NH)2Cr2O7 oxidized benzyl alcohol (H) and its derivatives (p-CH3, m-Br, m-NO2). Electron- donating substituents accelerated the reaction rate, whereas electron acceptor groups retarded the reaction rate. The Hammett reaction constant (ρ) was -0.69 (303K). The observed experimental data have been rationalize the proton transfer occurred followed the formation of a chromate ester in the rate-determining step. |
