In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis.
合成了10个内酯型冠醚化合物,其中7个冠醚是新化合物,其结构均由元素分析,及红外、核磁、质谱分析证实。
单词 | Crown Ethers |
释义 |
Crown Ethers
英语例句库
In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis. 合成了10个内酯型冠醚化合物,其中7个冠醚是新化合物,其结构均由元素分析,及红外、核磁、质谱分析证实。 Under acid condition open chaining crown ether diaromatic aldehyde can react, and they will synthesize a compound of chaining crown ether diaromatic aldehyde thiosemi-carbazone kind. 摘要链状冠醚二芳醛在酸性条件下与氨基硫脲反应,合成了链状冠醚二芳醛缩氨硫脲类化合物。 Two new exocyclic ring-fused boron-dipyrromethene (BDP) dyes with benzo crown ether subunit at meso-position were prepared.Their spectroscopic and electrochemical properties were investigated. 本文报道了两种中位为苯并冠醚亚单元取代的含稠合外环的硼-二吡咯亚甲基染料的合成、光谱和电化学性质。 Three open crown ethers were synthesized for the first time by using parathesin as the terminal group.They were characterized by IR, 1HNMR ,MS and EA. 以对氨基苯甲酸乙酯为端基合成了3种酰胺型开链冠醚,并通过IR、~1HNMR、MS和元素分析确证了它们的结构。
英语百科
Crown ether![]() ![]() Crown ethers are cyclic chemical compounds that consist of a ring containing several ether groups. The most common crown ethers are oligomers of ethylene oxide, the repeating unit being ethyleneoxy, i.e., –CH2CH2O–. Important members of this series are the tetramer (n = 4), the pentamer (n = 5), and the hexamer (n = 6). The term "crown" refers to the resemblance between the structure of a crown ether bound to a cation, and a crown sitting on a person's head. The first number in a crown ether's name refers to the number of atoms in the cycle, and the second number refers to the number of those atoms that are oxygen. Crown ethers are much broader than the oligomers of ethylene oxide; an important group are derived from catechol. |
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