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Statements

Subject Item
dbr:Electride
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dbr:2.2.2-Cryptand
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2.2.2-穴醚 (2.2.2)Kryptand (2.2.2)-kryptand 2.2.2-Cryptand 2.2.2-Cryptand
rdfs:comment
[2.2.2]Kryptand ist eine chemische Verbindung aus der Gruppe der Kryptand-Verbindungen. 2.2.2-kryptand (zkráceně crypt-222) je chelatační činidlo patřící mezi kryptandy. Le 2.2.2-cryptand est l'un des membres les plus importants de la famille des cryptands, des chélateurs oligocycliques constitués d'au moins trois domaines complexants. [2.2.2]穴醚是穴状配体螯合剂中最重要的成员之一。在无机化学命名法(2005)中，IUPAC建议缩写为"crypt-222"。 [2.2.2]Cryptand is the organic compound with the formula N(CH2CH2OCH2CH2OCH2CH2)3N. This bicyclic molecule is the most studied member of the cryptand family of chelating agents. It is a white solid. Many analogous compounds are known. Their high affinity for alkali metal cations illustrates the advantages of "preorganization", a concept within the area of supramolecular chemistry. For the design and synthesis of [2.2.2]cryptand, Jean-Marie Lehn shared the Nobel Prize in Chemistry. The compound was originally prepared starting with the diacylation of the diamine-diether:
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[2.2.2]Cryptand
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[2.2.2]Cryptand
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1081051988
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Cryptand.svg 2.2
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2.2
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2.2
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Skeletal formula of 2.2.2-cryptand
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Cryptating agent 222
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[2.2.2]Cryptand is the organic compound with the formula N(CH2CH2OCH2CH2OCH2CH2)3N. This bicyclic molecule is the most studied member of the cryptand family of chelating agents. It is a white solid. Many analogous compounds are known. Their high affinity for alkali metal cations illustrates the advantages of "preorganization", a concept within the area of supramolecular chemistry. For the design and synthesis of [2.2.2]cryptand, Jean-Marie Lehn shared the Nobel Prize in Chemistry. The compound was originally prepared starting with the diacylation of the diamine-diether: [CH2OCH2CH2NH2]2 + [CH2OCH2COCl]2 → [CH2OCH2CH2NHC(O)CH2]2 + 2 HCl The resulting macrocyclic diamide is reduced by lithium aluminium hydride. The resulting macrocyclic diamine tetraether reacts with a second equivalent of [CH2OCH2COCl]2 to produce the macrobicyclic diamide. This di(tertiary)amide is reduced to the diamine by diborane. [2.2.2]Cryptand binds K+ as an octadentate N2O6 ligand. The resulting cation K([2.2.2]cryptand)+ is lipophilic. 2.2.2-kryptand (zkráceně crypt-222) je chelatační činidlo patřící mezi kryptandy. Le 2.2.2-cryptand est l'un des membres les plus importants de la famille des cryptands, des chélateurs oligocycliques constitués d'au moins trois domaines complexants. [2.2.2]Kryptand ist eine chemische Verbindung aus der Gruppe der Kryptand-Verbindungen. [2.2.2]穴醚是穴状配体螯合剂中最重要的成员之一。在无机化学命名法(2005)中，IUPAC建议缩写为"crypt-222"。
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Cryptating agent 222
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4,7,13,16,21,24-Hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane
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