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- W2064322844 endingPage "1048" @default.
- W2064322844 startingPage "1043" @default.
- W2064322844 abstract "Interaction of La(NO3)3.6H2O, Eu(NO3)3.6H2O, UO2(NO3)2.6H2O or hydrobromic acid with N,N′-dibenzyl-4,13-diaza-18-crown-6 leads to double protonation of the N-containing heterocycle, affording [(H+)2N,N′-dibenzyl-4,13-diaza-18-crown-6][La(NO3)5(H2O)] (1), [(H+)2N,N′-dibenzyl-4,13-diaza-18-crown-6][Eu(NO3)5(H2O)] (2), [(H+)2N,N′-dibenzyl-4,13-diaza-18-crown-6][(μ-OH)2{UO2(NO3)2}2] (3) and (H9O4+)2[(H+)2N,N′-dibenzyl-4,13-diaza-18-crown-6]Br4 (5). The X-ray crystal structures of each compound were obtained, revealing unusual C–H⋯π interactions between the phenyl substituents and two macrocyclic methylene protons that govern the overall conformation of the macrocycle. We also report the X-ray crystal structure of the related [(H2O)2(H+)2N,N′-dibenzyl-4,13-diaza-18-crown-6][UO2Cl4] (4), which, surprisingly, does not have the same conformation of the cation, rather, two molecules of water bind to the inner cavity of the crown ether." @default.
- W2064322844 created "2016-06-24" @default.
- W2064322844 creator A5018038109 @default.
- W2064322844 creator A5058624133 @default.
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- W2064322844 date "2002-01-01" @default.
- W2064322844 modified "2023-10-13" @default.
- W2064322844 title "Intramolecular C–H⋯π interactions influence the conformation of N,N′-dibenzyl-4,13-diaza-18-crown-6 molecules" @default.
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- W2064322844 doi "https://doi.org/10.1039/b203646k" @default.
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