Cryptands翻译
WebCryptands are a family of synthetic bi- and polycyclic multidentate ligands for a variety of cations. The Nobel Prize for Chemistry in 1987 was given to Donald J. Cram , Jean … WebCryptand definition: (chemistry) Any of a class of polycyclic compounds related to the crown ethers, having three chains attached at two nitrogen atoms.
Cryptands翻译
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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. Web即时翻译文本&完整的文档文件。为个人和团队提供准确的翻译。每天有数百万人使用DeepL进行翻译。
Webcryptand ( plural cryptands ) ( chemistry) any of a class of polycyclic compounds related to the crown ethers, having three chains attached at two nitrogen atoms. This page was last … WebDec 1, 2004 · Cryptands find applications in many fascinating areas chemistry, biochemistry and material science due to their architectural and functional plasticity. This review discusses in detail different methods synthesis the recently reported cryptands and their applications, viz. in the recognition cations, anions and neutral molecules, as …
WebThe Crossword Solver found 30 answers to "crypts", 8 letters crossword clue. The Crossword Solver finds answers to classic crosswords and cryptic crossword puzzles. … 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 …
WebCryptands spherands Cross-fertilisation between the crown ethers (or, more generally, corands), cryptands, spherands and podands has produced an enormous range of …
Web2. Doc Translator使用强大的Google翻译功能来翻译文档。. 我们多此一举了？. Doc Translator依赖不断改进的 Google翻译 服务能力，以此处理文档中的文本，并将其翻译成您所需要的语言。. 3. 已翻译的文本将被重新插入到文档中，并保持原始排版。. 无需再从文档 … how do i insert textWebCryptands是一系列用于各种阳离子的合成双环和多环多齿配体。1987年的诺贝尔化学奖授予了DonaldJ.Cram、Jean-MarieLehn和CharlesJ.Pedersen，以表彰他们在发现和确定 … how do i insert smiley faces in outlook emailWebCryptands 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. how do i insert sim cardWeb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 … how much is vengo worthWebOct 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. how do i insert shapes in wordWebThe cryptands are three-dimensional, cation-enveloping host compounds that normally contain nitrogen and oxygen donors but may contain sulfur or other heteroatoms as well. … how much is venezuelan bolivar worth in usdWebThe 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 ... how do i insert rows in excel