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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 18, Number 6
BKCSDE 18(6)
June 20, 1997

Title	The Oxyanions of Calix[4]arene : The NMR Investigation of the Structure of the Oxyanions of Calix[4]arene
Author	Kye Chun Nam, Dae Soon Kim, Jong Min Kim
Keywords
Abstract	The structure and conformational behavior of the oxyanions of calix[4]arene have been studied by the NMR spectrum. The structure of the oxyanions of calix[4]arene was completely dependent upon the counter cation in present. All of the anions derived from in the presence of NaH and KH appear to exist as a cone conformation, whereas those produced with lithium cation such as n-butyllithium and LiOD show a more varied conformational behavior. The mono and tetraanions with lithium cation exist as a cone conformation, the trianions appear to exist as a partial cone conformation, and the dianions appear to disproportionate to the mono and trianions. The conformational stability decreases in the order of Li+ oxyanion > Na+ oxyanion > K+ oxyanion.
Page	636 - 640
Full Text	PDF

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