Table 3: Excited-state spectroscopic constants of trans-propenal (CH2CHCOH).

Constants 𝑣 = 1 𝑣 = 2 𝑣 = 3
This workRef. [3]This workRef. [3]This workRef. [3]

𝐴 (MHz.)45782.822  ±  3.23144727.881  ±  3.87343420.393  ±  5.888
𝐵 (MHz.)4666.210  ±  0.0044666.19  ±  024672.056  ±  0.0054672.10  ±  0.024678.661  ±  0.0064678.69  ±  0.02
𝐶 (MHz.)4259.668  ±  0.0054259.66  ±  0.024273.558  ±  0.0064273.56  ±  0.024290.297  ±  0.0074290.29  ±  0.02
𝐷 𝐽 (kHz)1.078  ±  0.0121.280  ±  0.0171.168  ±  0.026
𝐷 𝐽 𝐾 (kHz)−8.735  ±  0.075−46.831  ±  0.112−28.714  ±  0.631
𝜎 𝑓 0.0770.0850.075
𝜅 𝑔 −0.9804−0.9803−0.9802
Δ −0.702−1.212−1.861
𝑁 𝑖 432820

fStandard deviation of the overall fit.
gAsymmetry parameter.
hInertia defect Δ = 𝐼 𝑐 𝐼 𝑏 𝐼 𝑎 .
iNumber of transitions used in the fit.