乙烯与乙炔都是不饱和烃,但是它们在许多化学性质上有较大的差异。例如,与溴水及酸性KMnO_4溶液的反应活性,乙烯较活泼;但与H_2,HCN、Ag_2O的氨溶液的反应活性,乙炔较活泼,而在形成不饱和烃络合物时,乙烯的络合活性又比乙炔活泼。关于乙烯和乙炔性质差异的某些问题,在一些教材和著作中有所叙述,本文试从结构因素的角 Ethylene and acetylene are both unsaturated hydrocarbons, but they differ widely in many chemistries. For example, the reaction with bromine and acidic KMnO_4 solution, ethylene more active; but with H_2, HCN, Ag_2O ammonia solution reactivity, acetylene more active, and in the formation of unsaturated hydrocarbon complexes, the complexation of ethylene Activity and lively than acetylene. Some of the problems on the differences in the properties of ethylene and acetylene have been described in some textbooks and writings.