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Ab Initio Study of Vibrational Spectra of p-tert-Butylcalix[4]aryl Ester Complexed with Alkali Metal Cation

알칼리금속 양이온과 착물을 형성한 캘릭스[4]아릴에스터의 진동스펙트럼에 대한 순수양자역학적 연구

  • Published : 2006.02.20

Abstract

infrared(IR) absorption spectra were calculated for the ethyl ester of p-tert-butylcalix[4]arene (1) in the cone conformer and its alkali-metal-ion complex. The vibrational spectra were obtained by restricted Hartree-Fock (RHF) calculations with the 6-31G basis set. The characteristic vibrational frequencies of various C-O and C=O stretching motions of the complexes show that the structure of 1+K+ complex is almost of C4v symmetry compared to 1+Na+ (C2v) analogue. The theoretical results for the host molecule 1 and complex (1+Na+) were compared with the experimental results, and the calculated vibrational frequencies agree well with the features of the experimental spectra.

Keywords

Calix[4]aryl Ester;Complexation;Alkali Metal ion;Ab initio Calculation;Vibrational spectra

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