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- W2023396947 abstract "A b initio HF-SCF molecular geometry optimizations and vibrational mode calculations were performed for furan (I) and the two rotational isomers of 2-furancarboxaldehyde (11). Five basis sets were used to compare the quality of results, from minimal M I N I l to large split 6-31G**. The geometry of I agrees fairly well with accurate experimental determinations in the gas phase, and a full accurate theoretical geometry of each isomer of I1 is proposed instead of the incomplete experimental values. Calculated vibrational modes of I agreed with experimental results after appropriate scaling of the calculated harmonic modes. Results of a completevibrational mode analysis for I1 are reported. The effect of isotopic substitution on vibrational energies is fairly well reproduced for I and I1 in comparison with reported experimental results after a new computation of the vibrational energies with the same force constant matrix and different atomic masses. Assignments of bands to different isomers of I1 reopen a discussion about the origin of a carbonyl doublet detected in the liquid phase. Our assignments to C=O stretching bands are based on calculated isotopic displacements, too." @default.
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- W2023396947 date "2010-08-18" @default.
- W2023396947 modified "2023-10-18" @default.
- W2023396947 title "ChemInform Abstract: Theoretical Model of Furan and 2-Furancarboxaldehyde. The Molecular Structure and Vibrational Spectra, Including Isotopic Effects" @default.
- W2023396947 cites W2952524623 @default.
- W2023396947 doi "https://doi.org/10.1002/chin.199441032" @default.
- W2023396947 hasPublicationYear "2010" @default.
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