中文摘要：

合成了一种新型四氮配体（1,3-bis（pyridin-2-ylmethyl）imidazolidine）及其相应的锰（MnⅡ）配合物,并将其应用于催化过氧乙酸氧化烯烃的环氧化反应中,考察了催化剂当量及氧化剂当量等一系列条件对反应结果的影响,并在优化条件下研究了各种底物的适用范围,最终取得了很好的化学选择性及85%~99%的产率.

英文摘要：

A tetradentate ligand together with its manganese complex has been synthesized and characterized.The complex was screened for the catalytic epoxidation of a broad range of olefins using AcO2H as the oxidant.The efficient epoxidation of a family of olefins has been accomplished by the manganese catalyst that exhibits an uncommon chemoselectivity with low catalyst loading（0.5%）,fast conversion（5 min） and high yields（85%-99%）.