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中文摘要：
有离子的 N 杂环的汽车祈祷(NaL~1 和 NaL~2 ) 的二等价物的无水的 FeBr_2 的反应，被相应的盐的反应在 situ 产生， 4-R-C_6H_4COCH_2 [CH-(NCHCHN “ PrftBr ](R = OCH_3， H_2L~1Br， 1；R = F， H_2L~2Br， 2 ) 与 NaN (Sil L~1_2Fe (3 ) 的建筑群和在高度的 L~2_2Fe (4 ) 分别地产出的 bis-iigand Fe (ll )le_3 )_2 的二等价物，负担得起。综合的尝试由 1:1 的 mono-ligand Fe (ll ) 溴化物到 FeBr_2 的 NaL 的臼齿的比率是失败的，并且 3 和 4 的一样的建筑群被获得。3 和 4 被元素的分析和 X 光检查结构决心描绘了。初步的研究证明 3 和 4 能为 xi-caprolactone 的戒指洞聚合被用作单个部件的催化剂，并且 3 的催化活性比 4 的高。
英文摘要：
The reaction of anhydrous FeBr2 with two equivalents of anionic N-heterocyclic carbene （NaL1 and NaL2）, which are generated in situ by the reaction of the corresponding salt [4-R-C6H4COCH2{CH- （NCHCHN^1pr）}Br] （R = OCH3, H2L^1Br, 1; R = F, H2L^2Br, 2） with two equivalents of NaN（SiMe3）2, affords bis-ligand Fe（Ⅱ） complexes of L^12Fe （3） and L^22Fe （4） in high yield, respectively. Attempt to synthesize mono-ligand Fe（Ⅱ） bromide by the 1：1 molar ratio of NaL to FeBr2 is unsuccessful, and the same complexes of 3 and 4 were obtained. Both 3 and 4 have been depicted by elemental analysis and X-ray structure determination. Preliminary studies show that both 3 and 4 can be used as single-component catalyst for the ring-opening polymerization of ε-caprolactone, and the catalytic activity of 3 is higher than that of 4.
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