New Investigation of Millimeter-Wave Rotational Spectrum of CCl₃CN in Ground, v₇ = 1 and v₈ = 1 States

Abstract

The millimeter-wave rotational spectra of the ground and excited vibrational states v₇ =1 and v₈ =1 of the symmetric top molecule, CCl₃CN, have been analyzed again. The B₀ = 1666.80894(13) MHz, D_J = 0.135023 (23) kHz, D_JK = 0.60596 (45) kHz, H_J = -0.0192 (10) mHz, H_JK = 1.188 (34) mHz and H_KJ = -1.60 (21) mHz have been determined for ground state. The 𝓁 = ±1 series have been assigned and the rotational parameters including B₇ =1667.96659(25) MHz, (q⁺_t)₇=1.58855(94) MHz for v₇ =1 and B₈ =1667.08204 (31) MHz, (q⁺_t)₈ = 1.6141(36) MHz for v₈ = 1 states were determined accurately.