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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 26, Number 5
JKCSEZ 26(5)
October 20, 1982 

13C nmr Studies on the Interaction of Lithium Salts to Formamide, Acetamide and Propionamide Systems

Formamide, Acetamide 및 Propionamide계에 대한 리튬염의 상호작용에 관한 13C nmr 연구
Dae-Ho Shin, Jo W. Lee, Young Sang Choi

신대호, 이조웅, 최영상
Li염이 아미드와 상호작용할 때 카르보닐기와 알킬기의 13C chemical shift는 낮은 양쪽으로 이동하였으며, Li+이온이 카르보닐기에 직접 결합함을 보였다. 13C chemical shift의 크기는 아미드에 붙어있는 알킬기의 크기뿐만 아니라 음이온과의 상호작용에 의해서 지배됨을 알았다. 전하밀도가 큰 Cl-이온이 ClO4-이온보다 큰 음이온 효과를 나타냄을 보인다.

13C resonances of carbonyl and various alkyl groups in amides are found to shift down-field on the interaction with lithium salts and it is shown that lithium ion binds directly to the carbonyl group in amides. The magnitudes of the 13C chemical shifts of various amides depend not only on the size of alkyl groups in amides but also on the interaction with anion. The change of 13C chemical shift of amide in LiCl is smaller than that in LiClO4 due to the difference of the charge density of the anion.

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