【摘要】 用乙烯为探针研究了固氮酶中Ｎ２的键合位。结果表明，乙烯不能与Ｎ２在固氮酶体系中相竞争。提出Ｎ２在固氮酶中的键合位很可能是蛋白键合ＦｅＭｏ－ｃｏ笼内６Ｆｅ位的μ６（η２，ε４）和３Ｆｅ＋１Ｍｏ位的μ４（η３，ε１）方式，而不是笼口２Ｆｅ位的μ２（η２）方式，在合成氨Ｆｅ催化剂中Ｎ２的络合方式可能是μ６（η３，ε３）。更多还原

【Abstract】 Ethylene was used as a probe to detect the N2-binding site in nitrogenase.It was found that ethylene couldn’t compete with N₂ in the nitrogenase system.So the N2 binding site in nitrogenase might probably be the mode of 6Fe[μ6（η2,ε）]and the mode of 3Fe +1Mo[μ4（η3,ε1）] in the cage of the protein-bonded FeMo-co, but not be the mode of dinuclear coordination occurred on the 2Fe-sites at the gap of FeMo-co.In ammonia synthesis with iron catalysts,the N2-binding site might probably be the mode of 6Fe [μ6（η3,ε3）].更多还原