Microwave Spectrum of Formaldehyde : II. Molecular Structure in the Ground State
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概要
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Rotational constants for the isotopic formaldehyde molecules H_2CO, H_2C^<13>O, H_2CO^<18>, HDCO and D_2CO were determined from the parameters used in the analysis of K-type doubling spectra and the frequencies of 1_<01>←0_<00> transitions. In the cases of isotopic species for which the R-branch transitions were not measured, the calculated inertia defect was used in the determination of the rotational constants. From the rotational constants, the zero-point structure of formaldehyde molecule, γ_z, was determined by a new method taking into account the zero-point vibration-rotation interaction and electronic interaction. The following zero-point molecular structure was obtained; γ_<O-H> = 1.117_4±0.002A ∠HCO = 122°5'±20' γ_<C=O> = 1.206_3±0.002A planar. All of the rotational constants calculated from these geometrical parameters fit to the observed values, within the experimental error. In contrast to the previous researches, ∠HCO is much larger than 120°. It was also confirmed that the formaldehyde molecule is completely planar in the ground vibrational state.
- 社団法人日本物理学会の論文
- 1960-12-05
著者
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Oka Takeshi
Department Of Physics Faculty Of Science University Of Tokyo:(present)department Of Chemistry Facult
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Oka Takeshi
Department Of Astronomy And Astrophysics Department Of Chemistry And Enrico Fermi Institute Universi
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