کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1323795 | 1499872 | 2014 | 5 صفحه PDF | دانلود رایگان |
• Cationic half-sandwich scandium mono(silylamide) complexes were synthesized.
• Cationic half-sandwich scandium amide complexes were able to activate C–Cl σ-bond of PhCl.
• Cationic half-sandwich scandium chloride complex was prepared.
Treatment of the half-sandwich scandium bis(silylamide) complex (η5-C5Me5)Sc[N(SiMe3)2]2 with 1 equiv. of [PhNMe2H][B(C6F5)4] in THF and toluene gave the cationic half-sandwich scandium mono(silylamide) complexes [(η5-C5Me5)Sc{N(SiMe3)2}(THF)2][B(C6F5)4] (1) and [(η5-C5Me5)Sc{N(SiMe3)2}(PhNMe2)][B(C6F5)4] (2), respectively. 2 could be transformed into 1 by introducing of a small amount of THF. 2 was capable of activating kinetically inert C–Cl σ-bond of chlorobenzene to afford the cationic half-sandwich scandium chloride complex [{(η5-C5Me5)Sc(μ-Cl)(THF)2}2][B(C6F5)4]2 (3). 1–3 were characterization by elemental analysis and NMR spectroscopy. 1 and 3 were further structurally authenticated by X-ray crystallography.
The cationic half-sandwich scandium mono(silylamide) complex [(η5-C5Me5)Sc{N(SiMe3)2}(PhNMe2)][B(C6F5)4] is generated directly from its corresponding bis(silylamide) precursor (η5-C5Me5)Sc[N(SiMe3)2]2 with [PhNMe2H][B(C6F5)4], and can activate C–Cl σ-bond of chlorobenzene to give the cationic scandium chloride complex [{(η5-C5Me5)Sc(μ-Cl)(THF)2}2][B(C6F5)4]2.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 769, 15 October 2014, Pages 119–123