کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1328500 | 977584 | 2006 | 6 صفحه PDF | دانلود رایگان |
The reaction of the tantalocene dichloride monophosphines (1–2) with the binuclear complex [(p-cymene)RuCl2]2 gives the heterobimetallic compounds (p-cymene)[(η5-C5H5)(μ-η5:η1-C5H4(CH2)2PR2)TaCl2]RuCl2 (3–4). The air oxidation of these bimetallic species 3–4, leads to the cationic hydroxo tantalum ruthenium derivatives 5–6. The last ones are easily deprotonated by a base to afford the oxo analogues 7–8. A preliminary assessment in catalytic cyclopropanation of styrene with tantalum ruthenium bimetallic complexes 3–8 as precatalysts revealed a cooperative effect with a subtle role of the early metal fragment.
The synthesis of the heterobimetallic compounds (p-cymene)[(η5-C5H5)(μ-η5:η1-C5H4(CH2)2PR2)TaCl2]RuCl2 (3–4) is described. The air oxidation of these bimetallic species 3–4, leads to the cationic hydroxo tantalum ruthenium derivatives 5–6. The latter are easily deprotonated to afford the oxo analogues 7–8. These bimetallic complexes 3–8 have been involved in catalytic cyclopropanation of styrene.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 691, Issue 15, 15 July 2006, Pages 3239–3244