Expanding the coordination chemistry of buckminsterfullerene:synthesis and characterization of (N,N'-dimethylethylenediamine-[60]-fullerene)copper(II) bromide

摘要

The chelate (N,N'-dimethylethylenediamine-[60]-fullerene)copper(II) bromide was synthesized in 79% yield by the dropwise addition of a solution of N,N'-dimethylethylenediamine-[60]-fullerene in tetrahydrofuran (THF) to a solution of excess copper(II) bromide in THF.The resulting brown precipitate was characterized by electron spin resonance (ESR) spectroscopy and elemental analysis.Since their discovery in 1985 [1],fullerenes have been found to undergo a large number of chemical transformations [2].One such transformation is the addition of a diamine,namely piperazine,homopiperazine,or N,N'-dimethylethylenediamine,to the fullerene cage at a site where there are two adjacent six-membered rings [3,4].