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- W1967604295 abstract "Microwave spectra of CH3OH-NH3 and 13CH3OH-NH3 have been obtained using a pulsed-nozzle Fourier-transform microwave spectrometer. The spectra, which are complicated by the internal rotation of the CH3 and NH3 groups, exhibit five K=0 states at the ≈ 1 K rotational temperature of the expansion. Four of these are metastable, excited internal rotor states and correlate to E states of free CH3OH or NH3. For the two states in which the NH3 top is in its ground internal rotor state, ΔJ=1, K=0 progressions are observed and fit to linear-molecule-type frequency expressions to obtain effective spectroscopic constants. For CH3OH-NH3 these constants are: (B+C)/2=3690.119(2) and 3686.114(2) MHz; eQqaa=−3.184(10) and −3.182(9) MHz; and μa=2.854(9) and 2.956(14) D. The complexes are hydrogen bonded with an OH---N bond length of 2.02 Å. This bond length is similar to that found by Herbine and Dyke in the related HOH-NH3 complex, 1.97 Å. Ab initio SCF calculations have also been carried out for the CH3OH-NH3 and HOH-NH3 complexes in order to compare interaction-energy components and origins of the dipole moment enhancements." @default.
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- W1967604295 date "1988-09-01" @default.
- W1967604295 modified "2023-09-26" @default.
- W1967604295 title "Microwave spectrum of the CH3OH-NH3 complex" @default.
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- W1967604295 doi "https://doi.org/10.1016/0301-0104(88)85004-3" @default.
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