Table 1: Microwave and millimeter wave rotational transition frequencies of trans-propenal (CH2CHCOH) in the ground and excited torsional states (in MHz.).

TransitionsTorsional levels
𝐽 𝐾 1 𝐾 + 1 𝐽 𝐾 1 𝐾 + 1 𝑣 = 0 𝑣 = 1 𝑣 = 2 𝑣 = 3
Obs. Freq.Obs. − cal.Obs. Freq.Obs. − cal.Obs. Freq.Obs. − cal.Obs. Freq.Obs. − cal.

1010008902.19−.01
20210117801.28−.06
21111018221.12−.0718258.18−.1218289.86−.01
30320226694.35−.0126824.88.0126895.18.05
30321226765.43−.0927487.70.06
31221127329.73−.0727385.58.0827432.89.0226322.50−.07
31321226079.50−.0126165.84−.0526237.28−.12
32122026718.70−.16
32222126706.76.04
40430335673.16−.0935752.72.1735846.64.15
41431334768.96−.11
70760662144.50a.0162312.22a.0162452.30a−.11
71761660816.60a.0461018.40a.02
72662562290.80a−.0662456.80a−.0362597.20a.0562760.10a−.02
72562462460.30a−.0562624.20a−.0862762.20a−.0762922.30a.03
73463362341.20a−.0162506.50a−.0862648.90a.00
73563462339.40a−.0762504.80a−.0462647.20a.03
74364262331.10a.0262496.50a−.06
75365262493.40a.03
80870770961.80a.0071154.30a.1071315.20a.0471506.60a−.01
81771672820.00a−.0172969.40a.0373096.20a.0973243.30a−.06
81871769489.80a.0669720.40a−.1269911.60a.0170139.80a−.08
82772671179.00a.0771529.20a.07
82672571432.70a.1271619.40a.0871776.20a−.0371958.30a.04
83673571251.50a.0671440.40a.05
83573471255.00a.0871443.90a.0771606.10a−.17
84474371239.10a.0571428.20a.09
85475371423.10a.12
86376271421.10a−.06
90980880371.70a−.01
91881781901.20.0182069.50a−.0182212.30a.06
92882780062.80a.0480276.30a−.1180457.00a.0880667.10a.09
92782680424.00a.0780633.30a.0680808.70a−.0581012.40a−.08
93683580172.10a.0580384.50a.04
93783680165.70a.0380378.20a.12
94584480148.40a−.0480361.10a.04
95585480140.70a.0880353.40a.06
96486380137.50a−.0180350.40a.06
1001090988523.30a−.0188765.90a−.0589211.90a−.12
101991890974.40a−.05
1011091986818.50a−.02
102892789436.20a−.0189667.83a.0389861.60a−.02
102992888941.80a−.0189179.48a.1089380.10a.0789613.80a−.02
103793689093.20a−.0189329.07a−.01
103893789082.20a−.08
104694589059.35a−.0989295.47a−.09
105595489048.30a−.01
106496389043.55a−.04
107397289041.90a−.02
109199089043.17a−.02
110111001097263.13a−.0197531.40a−.0397756.50a−.1298025.70a.05
111111011095473.05a−.0395791.10a.0196054.40a.1496369.80a.04
1129102898470.83a−.0198724.30a−.1198936.00a.02
11210102997815.59a.0398077.10a.0098555.60a.08
1138103798019.04a−.0298278.40a.0598500.60a.0398752.70a−.03
1139103898001.32a.0098260.60a.0198482.90a−.0698735.30a−.01
1148104798231.70a−.08
1157105697957.00a.0098216.90a−.0598453.50a.04
1165106497950.28a.0098456.20a−.01
1174107397947.54a.01
1183108297947.05a.04
11120224892.58.01
21230315585.86.01
60651513444.27.02
70761623450.46.01
80871733595.68−.01

aThis work, rest are from [1].