کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1325782 | 977401 | 2006 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis of niobocene imido cations: X-ray crystal structure of [Nb(NBut)(η5-C5H4SiMe3)2(CNBut)][BPh4] Synthesis of niobocene imido cations: X-ray crystal structure of [Nb(NBut)(η5-C5H4SiMe3)2(CNBut)][BPh4]](/preview/png/1325782.png)
The reduction of [Nb(NBut)(η5-C5H4SiMe3)2Cl] by sodium amalgam followed by oxidation by [Fe(η5-C5H5)2][BPh4] in the presence of CNBut gave [Nb(NBut)(η5-C5H4SiMe3)2(CNBut)][BPh4] (1). In a similar manner, [Nb(NPh)(η5-C5H4SiMe3)2(CNBut)][BPh4] (2), [Nb(NPh)(η5-C5H4SiMe3)2(CO)][BPh4] (3) and [Nb(NBut){Me2Si(η5-C5Me4)(η5-C5H4)}(CNBut)][BPh4] (4), were prepared. The reduction of [Nb(NBut){Me2Si(η5-C5H4)2}Cl] gave, depending on the experimental conditions, either the d1–d1 dimer [(Nb{Me2Si(η5-C5H4)2}(μ-NBut))2] (5) or the hydride derivative [Nb(NBut){Me2Si(η5-C5H4)2}H] (6). The reaction of 5 with I2 led to the formation of [Nb(NBut){Me2Si(η5-C5H4)2}I] (7). The molecular structure of 1 was determined by single-crystal X-ray diffraction studies.
The synthesis and structural characterization of niobocene imido cation species are described. The preparation of a d1–d1 niobocene imido dimer is also reported.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 691, Issue 17, 15 August 2006, Pages 3652–3658