MICROWAVE ROTATIONAL SPECTRUM AND PROPERTIES OF HYDROGEN-BONDED DIMER FORMED BY TRIMETHYLAMINE AND ACETYLENE

Article abstract of DOI:10.1016/0022-2860(88)80220-5

The rotational spectra of the four isotopic species (CH3)3-14N...HCCH, (CH3)3-14N...DCCH, (CH3)3-14N...HCCD and (CH3)3-14N...DCCD of a hydrogen-bonded dimer formed between trimethylamine and acetylene have been observed by pulsed-nozzle, Fourier-transform microwave spectroscopy.The ground-state spectroscopic constants determined for these symmetric-top molecules are:

For (CH3)3-14N...HCCH it has been established that the 14N-nuclear quadrupole coupling constant varies linearly with K² according to χ(K) = χ(K = 0) + (6.6*10^-3)K² MHz.The following molecular properties have been determined for the dimer from the spectroscopic constants: r(N...C) = 3.254(4) Angstroem, θ_av = 15.43(9) deg and k_? = 5.82(2) N m^-1.

Full text of DOI:10.1016/0022-2860(88)80220-5

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