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5942342金虫 (小有名气)
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[求助]
求诸位大神帮忙翻译成英文呗
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| 四羰基钴阴离子是一种广泛应用于多种重要的均相催化反应的催化活性物种. 但由于其中钴金属呈-1价, 表现出极强的还原性, 因而它的大多数化合物对空气都十分敏感, 极易被空气氧所氧化变质, 很大程度上限制了它直接作为催化剂的应用. 到目前为止, 文献报道的事实上以四羰基钴为有效成分的催化体系大多以由八羰基二钴[Co2(CO)8]与碱原位形成的催化体系为主。自从2001年Dyson等人报道了第一例含有羰基金属阴离子的离子液体以来, 这类新颖的金属有机离子液体就引起了人们的关注. 它突破了常规离子液体以BF-4 或者PF-6 等基团为阴离子的惯例,创造性地将活泼的金属有机片段四羰基钴作为离子液体的阴离子部分, 得到的物质除了一定程度上空气敏感以外, 具有一切常规离子液体的性质, 尤其是还作为可循环催化剂催化溴代芳香酮的脱溴反应. 该文被广泛引用, 然而, 可能的后续工作却一直很罕见. 考虑到四羰基钴优异的催化性能及其在羰基化反应中广泛的应用, 在本文中, 我们对这种化合物的合成和应用进行了进一步深入的研究. 结果表明, 改进的合成方法能够简便地得到更为纯净的目标化合物, 并进行一系列完整的谱学表征, 使我们首次对该物质的状态和性质有了更加深入和系统的认识. |
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爱与雨下: 金币+1 2013-12-12 18:53:59
5942342(RXMCDM代发): 金币+5, 多谢应助！ 2014-01-16 00:10:18
爱与雨下: 金币+1 2013-12-12 18:53:59
5942342(RXMCDM代发): 金币+5, 多谢应助！ 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楼2013-12-12 15:41:06
5942342
金虫 (小有名气)
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3楼2013-12-13 19:53:36
4楼2013-12-14 04:43:47
5942342
金虫 (小有名气)
- 应助: 2 (幼儿园)
- 金币: 1094.2
- 红花: 1
- 帖子: 104
- 在线: 49.9小时
- 虫号: 1917770
- 注册: 2012-07-31
- 性别: GG
- 专业: 有机合成
5楼2013-12-14 09:59:16
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