• Title/Summary/Keyword: $6-31^*$

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Ab Initio Calculated Structures and Vibrational Spectra of 1,3-Diethoxy-p-tert-butylcalix[4]crown-5-ether Complexed with Potassium Cation

  • Choe, Jong-In
    • Bulletin of the Korean Chemical Society
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    • v.28 no.2
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    • pp.235-240
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    • 2007

  • Molecular structures were optimized for the 1,3-diethoxycalix[4]crown-5-ether (2) in the various isomers and their potassium-ion complexes by using B3LYP/6-31+G(d,p)//B1LYP/6-31G(d,p) method after ab initio RHF/6-31G calculation. The cone-shaped isomer of 2 with cr-binding mode has shown the strongest binding efficiency among the six different complexes attributed to seven electrostatic interactions between the potassium cation and the oxygen atoms of crown-5-ether and ethoxy groups of the host (2). The vibrational spectra of 2 and its K+-complexes were obtained by restricted Hartree-Fock (RHF) calculations with the 6-31G basis set. The characteristic vibrational frequencies of various C-O-C stretching and bending motions are analyzed.

  • https://doi.org/10.5012/bkcs.2007.28.2.235 인용 PDF KSCI