| 초록 |
Cr(VI)-4,4'-bipyridine complex [(C10H8N2H)2Cr2O7] was synthesized by the reaction of 4,4'-bipyridine with chromium(VI) trioxide. The structure was characterized using IR spectroscopy and inductively coupled plasma (ICP). In the presence of N,N'-dimethylformamide solvent with an acidic catalyst such as sulfuric acid (H2SO4 solution), (C10H8N2H)2Cr2O7 oxidized benzyl alcohol (H) and its derivatives (p-OCH3, m-CH3, m-OCH3, m-Cl, m-NO2). Electron- donating substituents accelerated the reaction rate, whereas electron acceptor groups retarded the reaction rate. Hammett reaction constant (ρ) was -0.70 (308 K). The observed experimental data were used to rationalize the hydride ion transfer in the rate-determining step. |
