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Table 3

Experimental ground-state spectroscopic constants of cis-gauche and cis-trans n-PrCHO (A-Reduction, Ir-Representation).

Parameters cis-gauche cis-gauche (mw)(a) cis-trans cis-trans (mw)(a)
A(b) (MHz) 8508.53795 (16)(c) 8508.527 (3) 15069.38645 (92) 15069.347 (5)
B (MHz) 3588.81565 (14) 3588.809 (1) 2555.992540 (85) 2555.983(2)
C (MHz) 2928.57776 (10) 2928.5749 (9) 2278.607628 (88) 2278.608(1)
|µa|, |µb|, |µc|(d) (D) Yes/yes/yes Yes/yes/no Yes/yes/no Yes/yes/no
J (kHz) 3.648341 (87) 3.63 (1) 0.611752 (30) 0.50 (5)
jk (kHz) −12.199378 (19) −12.04 (8) −4.23054 (30) −4.3 (3)
K (kHz) 23.5595 (33) 23.3 (1) 37.8014 (89)
δJ (kHz) 1.110506 (38) 1.101 (4) 0.0994029 (45)
δK (kHz) 5.60931 (81) 5.3(1) −0.1183 (10)
ΦJ (mHz) −12.147 (23) 0.0344(35)
Φjk (Hz) 0.12797 (67) 0.004310 (50)
ΦK (Hz) 0.71765 (40) 0.492 (27)
Φkj (Hz) −0.49693 (20) −0.2641 (11)
ϕJ (mHz) −5.603 (11)
ϕjk (Hz) −0.06452 (33)
N(e) 2839 58 1375 16
σ (f) (kHz) 29 15 28 8
σw (ɡ) 1.02 0.95

Notes. (a)Previously measured microwave data from Hotopp et al. (2012) included for comparison. (b)A, B, and C represent the rotational constants. (c)Standard error in parentheses in units of the last digit. Their values are close to the 1σ standard uncertainties since the unit-less (weighted) deviation of the fit is very close to 1.0. (d)|µa|, |µb|, and |µc| are the absolute values of the electric dipole moment components (in D). (e)N is the number of transitions.(f)σ is the rms deviation of the fit. (ɡ)σw is the unit-less (weighted) deviation of the fit.

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