کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1326797 | 977445 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Ethynylferrocene insertion into Fe–C bond in bridging aminocarbyne diiron complexes: New triiron vinyliminium complexes Ethynylferrocene insertion into Fe–C bond in bridging aminocarbyne diiron complexes: New triiron vinyliminium complexes](/preview/png/1326797.png)
The μ-aminocarbyne complexes [Fe2{μ-CN(Me)(R)}(μ-CO)(CO)(NCMe)(Cp)2][SO3CF3] (R = Me, 1a; Xyl, 1b; Xyl = 2,6-Me2C6H3) react with ethynylferrocene to give the corresponding bridging vinyliminium complexes [Fe2{μ-η1:η3-CN(Me)(R)CHC(Fc)}(μ-CO)(CO)(Cp)2][SO3CF3] (R = Me, 2a; R = Xyl, 2b). Insertion of the ethynylferrocene in the metal–carbyne bond is regiospecific, and leads to the formation of only one isomer.Complexes 2a and 2b undergo hydride addition (by NaBH4) affording the enaminoalkylidene complex [Fe2{μ-η1:η3-C(H)(N(Me)2)CHC(Fc)}(μ-CO)(CO)(Cp)2] (3a) and the bis-alkylidene [Fe2{μ-η1:η2-C(N(Me)(Xyl))CH2C(Fc)}(μ-CO)(CO)(Cp)2] (3b), respectively. Upon treatment with NaH, compounds 2a and 2b undergo fragmentation, affording the 1-metalla-2-aminocyclopenta-1,3-dien-5-one complexes [Fe(CO)(Cp){C(N(Me)(R))}CHC(Fc)C(O)}] (R = Me, 4a; R = Xyl, 4b).The molecular structures of 2b, 3b and 4b have been determined by X-ray diffraction studies.
New triiron vinyliminium complexes are obtained by insertion of ethynylferrocene in the Fe–C bond of bridging carbine complexes. The reactions of these new compounds with hydrides (NaBH4 and NaH) are also reported.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 695, Issue 23, 1 November 2010, Pages 2519–2525