| 초록 |
Copper are well known and attractive because it is one of the cheapest, most abundant and relatively, a less toxic metal. It can act as a catalyst for amination reactions with aryl halide and liquid ammonia. The other solvents require strong base and ligands as additives for the similar metal-catalyzed amination of aryl halide but ammonia does not. In the copper(I)-catalyzed amination of aryl halide in liquid ammonia, cuprous ion is disproportionate into Cu(0) and cupric salts in liquid ammonia with a small constant. This disproportionation of Cu(I) produces extremely active ‘nascent’ Cu(0) in-situ which cause dehalogenation. In this study, dehalogenation metallic copper generated was directly proved using UV-vis spectroscopy and electron spin resonance. Also, the products distribution according to oxidation states of Cu catalyst was examined by gas chromatography |
