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- W2068761491 abstract "The ground‐state rotational spectra of the two isotopomers [(CH3)3N,HI] and [(CH3)3N,DI] of a dimer formed between trimethylamine and hydrogen iodine have been observed in the gas phase by the pulsed‐nozzle, F–T microwave technique. The spectroscopic constants B0, DJ, DJK, χ(14N) and χ(I) have been determined for both isotopomers and have the values 894.0954(2) MHz, 0.010 17(18) kHz, 5.880(10) kHz, −2.451(8) MHz, and −341.204(14) MHz, respectively for [(CH3)3N,HI]. It is concluded, by comparing the iodine nuclear quadrupole coupling constant χ(I) and the intermolecular stretching force constant kσ with those of model hydrogen‐bonded (H3P...HI) and ion‐pair (Na+...I−) analogs, that (CH3)3NH+...I− is the appropriate description for the gas‐phase dimer. An experimentally defined fractional ionic character indicates that the extent of proton transfer increases smoothly along the series [(CH3)3N,HX], where X=F, Cl, Br, and I. Simple energetic considerations are shown to be in agreement with this conclusion." @default.
- W2068761491 created "2016-06-24" @default.
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- W2068761491 date "1993-08-01" @default.
- W2068761491 modified "2023-09-25" @default.
- W2068761491 title "Rotational spectrum of the trimethylamine‐hydrogen iodide dimer: An ion pair (CH<sub>3</sub>)<sub>3</sub>NH<sup>+</sup>⋅⋅⋅I<sup>−</sup> in the gas phase" @default.
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- W2068761491 doi "https://doi.org/10.1063/1.465315" @default.
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