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5942342金蟲 (小有名氣)
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[求助]
求諸位大神幫忙翻譯成英文唄
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| 四羰基鈷陰離子是一種廣泛應用于多種重要的均相催化反應的催化活性物種. 但由于其中鈷金屬呈-1價, 表現(xiàn)出極強的還原性, 因而它的大多數(shù)化合物對空氣都十分敏感, 極易被空氣氧所氧化變質(zhì), 很大程度上限制了它直接作為催化劑的應用. 到目前為止, 文獻報道的事實上以四羰基鈷為有效成分的催化體系大多以由八羰基二鈷[Co2(CO)8]與堿原位形成的催化體系為主。自從2001年Dyson等人報道了第一例含有羰基金屬陰離子的離子液體以來, 這類新穎的金屬有機離子液體就引起了人們的關(guān)注. 它突破了常規(guī)離子液體以BF-4 或者PF-6 等基團為陰離子的慣例,創(chuàng)造性地將活潑的金屬有機片段四羰基鈷作為離子液體的陰離子部分, 得到的物質(zhì)除了一定程度上空氣敏感以外, 具有一切常規(guī)離子液體的性質(zhì), 尤其是還作為可循環(huán)催化劑催化溴代芳香酮的脫溴反應. 該文被廣泛引用, 然而, 可能的后續(xù)工作卻一直很罕見. 考慮到四羰基鈷優(yōu)異的催化性能及其在羰基化反應中廣泛的應用, 在本文中, 我們對這種化合物的合成和應用進行了進一步深入的研究. 結(jié)果表明, 改進的合成方法能夠簡便地得到更為純凈的目標化合物, 并進行一系列完整的譜學表征, 使我們首次對該物質(zhì)的狀態(tài)和性質(zhì)有了更加深入和系統(tǒng)的認識. |
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lee021280
銅蟲 (初入文壇)
- 應助: 0 (幼兒園)
- 金幣: 30.8
- 帖子: 21
- 在線: 2.1小時
- 蟲號: 205027
- 注冊: 2006-03-03
- 性別: GG
- 專業(yè): 有機合成
4樓2013-12-14 04:43:47
【答案】應助回帖
★ ★ ★ ★ ★ ★
愛與雨下: 金幣+1 2013-12-12 18:53:59
5942342(RXMCDM代發(fā)): 金幣+5, 多謝應助！ 2014-01-16 00:10:18
愛與雨下: 金幣+1 2013-12-12 18:53:59
5942342(RXMCDM代發(fā)): 金幣+5, 多謝應助！ 2014-01-16 00:10:18
| The four cobalt carbonyl anion is a kind of catalytically active species widely used in many important homogeneous catalytic reactions. However, because cobalt metal is -1 and shows an extremely strong reducibility, most of its compounds are very sensitive to the air, and are easily oxidized and deteriorated by air oxygen. This largely limits its application as catalyst directly. So far, what literature reports is factually that the catalytic system, whose effective components is the tetracarbonylcobaltatelt, is mainly based on catalytic system formed by octacarbonyldicobalt [Co2(CO)8] and Alkali -situ. Since Dyson et al reported the first case of lonic liquid that contained metal carbonyl anions in 2001, this kind of novel metal organic lonic liquids has attracted people's attention. It has broken through the practice of the conventional lonic liquid in BF-4 or BF-6 perssad, and creatively made the lively metal organic fragments--the tetracarbonylcobaltatelt as anionic part of lonic liquids. In addition to a certain extent of air sensitive,the substances obtained have all the conventional ionic liquids properties, especially as the debromination reaction that recyclable catalyst catalyzed the bromo aromatic ketone. Although the article was widely cited, the possible follow-up work has been rarely seen. Considering the excellent catalytic properties of the tetracarbonylcobaltatelt and its wide application in Carbonylation reaction, in this paper, we had a further study for the synthesis and application of these compounds.The result shows that modified synthetic methods can easily get purer target compounds, and conduct a series of complete spectroscopic characterization. This makes us have a more profound and systematic understanding of the status and characteristics of the material for the first time. |
2樓2013-12-12 15:41:06
5942342
金蟲 (小有名氣)
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- 注冊: 2012-07-31
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3樓2013-12-13 19:53:36
5942342
金蟲 (小有名氣)
- 應助: 2 (幼兒園)
- 金幣: 1094.2
- 紅花: 1
- 帖子: 104
- 在線: 49.9小時
- 蟲號: 1917770
- 注冊: 2012-07-31
- 性別: GG
- 專業(yè): 有機合成
5樓2013-12-14 09:59:16
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