The diiron µ‐vinyliminium compounds [Fe₂Cp₂(CO)(µ‐CO){µ‐η¹:η³‐C³HC²HC¹NMe(R)}]CF₃SO₃ (R = Me, 2a; R = Xyl = 2,6‐C₆H₃Me₂, 2b; Cp = η⁵‐C₅H₅) reacted with grey selenium, in the presence of sodium methoxide, to give the corresponding Se‐functionalized derivatives [Fe₂Cp₂(CO)(µ‐CO){µ‐η¹:η³‐C³HC²(Se)C¹NMe(R)}], 3a–b, in ca. 50 % yields. The monoiron zwitterionic complex [FeCp(CO){SeC¹(NMe₂)C²HC³H}], 4, was obtained as a side‐product (31 %) of the reaction leading to 3a. The treatment of 3b with S₈/NaOMe afforded the 2‐ferra‐thiophene [FeCp(CO){SC³HC²HC¹NMe(Xyl)}], 5, in 49 % yield. The straightforward reactions of 3a with a two‐fold excess of dialkylacetylenedicarboxylates led to functionalized 3‐amino‐selenophenes appended to the diiron frame through a bridging allylidene ligand, [Fe₂Cp₂(CO)(µ‐CO){µ‐η¹:η³‐C⁷(CO₂R)C⁶(CO₂R)C³HC²SeC⁵(CO₂R)C⁴(CO₂R)C¹(NMe₂)}] (R = Me, 6a; R = Et, 6b; R = tBu, 6c), in approximately 50 % yields. The synthesis of 6a–c is the result of two distinct modes of reactivity exhibited by the alkyne reactant in one pot, i.e. 1,3‐dipolar cycloaddition to C and Se atoms and insertion into Fe‐µ‐alkylidene. All the products were characterized by means of elemental analysis, IR and multinuclear NMR spectroscopy, and the molecular structure of 6a was elucidated by a single‐crystal X‐ray diffraction study.

中文翻译：

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在Diiron配合物上通过炔烃双作用构建功能化硒亚基-亚芳基配体

该二铁μ-vinyliminium化合物的[Fe ₂的Cp ₂（CO）（μ-CO）{μ-η ¹：η ³ -C ³ HC ² HC ¹ NME（R）}] CF ₃ SO ₃（R = Me中，图2a ; R =的Xyl = 2,6-C ₆ H ^ ₃我₂，2B ; CP =η ⁵ -C ₅ H ^ ₅）用灰色硒反应，在甲醇钠的存在下，得到相应的硒官能衍生物的[Fe ₂的Cp ₂（CO）（μ-CO）{μ-η ¹：η ³ -C ³HC ²（Se）C ¹ NMe（R）}]，3a – b，约ca。50％的产率。获得了单铁两性离子络合物[FeCp（CO）{SeC ¹（NMe ₂）C ² HC ³ H}] 4，作为反应的副产物（31％），导致3a。用S ₈ / NaOMe处理3b，得到49产率的5价的2-ferra-噻吩[FeCp（CO）{SC ³ HC ² HC ¹ NMe（Xyl）}] 。3a的直接反应与两倍过量导致附加到二铁框架官能3-氨基硒吩dialkylacetylenedicarboxylates的通过桥连的亚烯丙基配体，[铁₂的Cp ₂（CO）（μ-CO）{μ-η ¹：η ³ -C ⁷（CO ₂ R）C ⁶（CO ₂ R）C ³ HC ² SeC ⁵（CO ₂ R）C ⁴（CO ₂ R）C ¹（NMe ₂）}]]（R = Me，6a ; R = Et，6b ; R = t Bu，6c），产率约为50％。6a – c的合成是炔烃在一个罐中表现出的两种不同反应模式的结果，即1,3-偶极环加成到C和Se原子上并插入到Fe-µ-亚烷基中。所有产品均通过元素分析，红外光谱和多核NMR光谱进行了表征，并通过单晶X射线衍射研究阐明了6a的分子结构。