Cryptands翻译

Webthe design, synthesis, and binding properties of the cryptands by J.-M. Lehn, J.-P. Sauvage, and B. Dietrich [5,6] further demonstrated the attractions and opportunities of complexation chemistry. Although we tried to interest grad-uate students in synthesizing chiral crown ethers from 1968 on, the efforts were Web翻译器. Translate texts with the world's best machine translation technology, developed by the creators of Linguee. 词典. Look up words and phrases in comprehensive, reliable …

THE DESIGN OF MOLECULAR HOSTS, GUESTS, AND THEIR …

WebAs seen in Figure 14 the ellipsoidal cryptands may be prepared by the simultaneous formation of three bridges. This route has found limited use due to low yields but has been employed in the synthesis of some cryptands including the tris-pyridino system (36) 〈81TL3035〉 and bis-tren (18) 〈80UP52100〉.The presence of nitrogen bridgeheads … WebNov 26, 2024 · The chemistry of the alkali metals is dominated by the stability of the +1 oxidation state and the noble gas configuration of the M + cation. The alkali metals all have low first ionization energies (Table 3.2. 3 .6) but very high second ionization energies. Element. 1st ionization energy (kJ/mol) Li. 526. dairy queen greencastle indiana https://moontamitre10.com

Cryptands_全球百科

WebThe cryptands have the same kind of properties as the crown ethers and the same uses. In general, they form much more strongly bound complexes and can be used to stabilize unusual ionic species. For example, it is possible to produce the negative Na− ion in the compound [(2,2,2)-cryptand-Na]+Na−, which is a gold-coloured crystalline ... WebCryptands spherands Cross-fertilisation between the crown ethers (or, more generally, corands), cryptands, spherands and podands has produced an enormous range of … WebVerfahren nach Anspruch 7, dadurch gekennzeichnet, dass die Deprotonierung in Gegenwart von Kronenethern, Kryptanden, Podanden, Polyethern oder Aminen durchgeführt wird. Process according to Claim 7, characterized in that the deprotonation is carried out in the presence of crown ethers, cryptands, podands, polyethers or amines. … dairy queen grill \u0026 chill green bay wi

Cryptand - an overview ScienceDirect Topics

Category:Cryptands - Example Structure and application •MSc first ... - YouTube

Tags:Cryptands翻译

Cryptands翻译

cryptands中文_cryptands是什么意思 - 爱查查

WebCryptands are more expensive and difficult to prepare, but offer much better selectivity and strength of binding than other complexants for alkali metals, such as crown ethers. They are able to bind otherwise insoluble salts into organic solvents. They can also be used as phase transfer catalysts by transferring ions from one phase to another. WebThe Crossword Solver found 30 answers to "crypts", 8 letters crossword clue. The Crossword Solver finds answers to classic crosswords and cryptic crossword puzzles. …

Cryptands翻译

Did you know?

Web百度翻译提供即时免费200+语言翻译服务，拥有网页、app、api产品，支持文本翻译、文档翻译、图片翻译等特色功能，满足用户查词翻译、文献翻译、合同翻译等需求，随时随 … WebSep 25, 2014 · Cryptand Cryptands are a family of synthetic bi- and polycyclic multidentate ligands for a variety of cations.[1] The Nobel Prize for Chemistry in 1987 was given to Donald J. Cram, Jean-Marie Lehn, and Charles J. Pedersen for their efforts in discovering and determining uses of cryptands and crown ethers, thus launching the now fluorishing …

WebDec 29, 2024 · Cryptands are a group of organic compounds that contain ether groups and nitrogen atoms. These are either cyclic or non-cyclic structures. We can define them as bicyclic or polycyclic synthetic … WebCryptands III.1 Introduction Like crown ethers, cryptands were designed and synthesized as binding receptors of smaller molecular substrates. A simple definition of a cryptand is a bicyclic (or polycyclic) ligand.1 This definition was derived from Lehn's observations of the behavior of cryptands with alkali metals.

WebCryptands, or macrobicyclic ligands, are similar in structure to crown ethers, differing in the addition of a bridge that reaches across the ring to give football-shaped structures such as compound 4 in Fig. 1.The trivial nomenclature used for these ligands is given by the number of ethylene oxide units in each of the three bridges connecting the two nitrogen … http://fanyi.youdao.com/

Web文档翻译支持2M内免费；. 在线查看译文时有水印（下载的没有水印）。. 福昕翻译是一个在线的翻译网站，可以一次性翻译整篇文档，还有双语对照和还原排版的译文可以下载，阅读起来比较方便。. 而且支持的格式也比较多，PDF、Word、PPT、Excel，甚至是扫描件 ...

WebJean-Marie Lehn (born 30 September 1939) is a French chemist.He received the Nobel Prize in Chemistry together with Donald Cram and Charles Pedersen in 1987 for his synthesis of cryptands.Lehn was an … dairy queen grill \u0026 chill olathe ksWebThe cryptands are three-dimensional, cation-enveloping host compounds that normally contain nitrogen and oxygen donors but may contain sulfur or other heteroatoms as well. … bioshop trierhttp://www.ichacha.net/cryptands.html dairy queen grand forks hoursWeb一站式科研服务平台. 学术工具. 文档翻译; 收录引证; 论文查重; 文档转换 dairy queen happy mother\u0027s dayWebJun 8, 2010 · Cryptands including azacryptands play a crucial role in the synthesis of alkalide and electrides. 969 The first barium sodide [Ba{H 5 aza(2.2.2)crypt}] + Na − was … dairy queen giving free ice cream todayWebOct 26, 2011 · Crown ethers, cryptands and other compounds. 3.1 Introduction . There have be en a huge number of hydrocarbon rings synthesised, some of which have been . described in previous c hapters. dairy queen gulf shoresbioshore partners