کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1328004 1499948 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Coupling of terminal alkynes by RuHXL2 (X = Cl or N(SiMe3)2, L = PiPr3)
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Coupling of terminal alkynes by RuHXL2 (X = Cl or N(SiMe3)2, L = PiPr3)
چکیده انگلیسی

The compounds RuL2HX, where L = PiPr3 and X = Cl or N(SiMe3)2, are catalyst precursors for dimerization of terminal alkynes to enynes and also to cumulenes at 23 °C; selectivity among these products is X-dependent, but not high. Conversion of Ru species onto the catalytic cycle was undetectably small, so alternative approaches to understanding the catalytic mechanism were employed: stoichiometric reactions, independent synthesis of candidate intermediates, and trapping with CO. These show the intermediacy of vinylidenes and vinyl compounds, and reveal conversion of cumulenes to the thermodynamically more stable enynes.

Carbonyl free RuHCl(PiPr3)2 is studied for its ability to catalytically dimerize RCCH to enynes and cumulenes.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Organometallic Chemistry - Volume 693, Issues 8–9, 15 April 2008, Pages 1664–1673
نویسندگان
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