کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1328506 | 977584 | 2006 | 8 صفحه PDF | دانلود رایگان |
Several new ferrocenylethynyl derivatives, (FcCC)2CHOH, (FcCC)2CH2, (FcCC)2CPhOH have been synthesised from ethynylferrocene. Attempts to synthesise the corresponding bis(ferrocenylethynyl)-stabilised carbocations by hydroxyl or hydride abstraction from the bridging group was unsuccessful for (FcCC)2CHOH and (FcCC)2CH2, respectively. In the case of (FcCC)2CPhOH, the [(FcCC)2CPh]+ cation could be observed by 1H and 13C NMR, and by UV–Vis–NIR spectroscopy, but was too unstable for isolation or prolonged study in solution. The UV–Vis–NIR spectrum of [(FcCC)2CPh]+ is compared to that of the considerably more stable cations, [Fc(CHCH)2CH]+ and [(FcCHCH)2CPh]+.
Attempts to synthesize a bis(ferrocenylethynyl)-stabilised carbocation from (FcCC)2CHOH were unsuccessful. However, the [(FcCC)2CPh]+ cation could be observed by 1H and 13C NMR, and by UV–Vis–NIR spectroscopy. Although [(FcCC)2CPh]+ is much less stable than [(FcCHCH)2CPh]+, spectroscopic properties could be compared.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 691, Issue 15, 15 July 2006, Pages 3285–3292