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There are 228 lines that fit the selection criteria; the display limit is 500.
Table 4: Recommended rest frequencies for observed interstellar molecular lines by Frank J. Lovas.
  Frequency
(MHz)
Unc. Formula Name Quantum
numbers
Tr(K)
/Ta(K)
Source Telescope Astr.
ref.
Lab.
ref.
  40039.018* (10) CH2CO Ethanone (ketene) 2(1,2)-1(1,1) 0.09 TMC-1 NRO 45m Ohi98  
  40198.356 (30) C6H 1,3,5-Hexatriynyl 23/2 J=29/2-27/2 e 0.084 TMC-1 NRO 45m Suz86 Suz86
  40204.150 (30) C6H 1,3,5-Hexatriynyl 23/2 J=29/2-27/2 f 0.87 TMC-1 NRO 45m Suz86 Suz86
  40229.643   CH2CN Cyanomethyl 2-1 5/2-3/2 7/2-5/2 7/2-7/2 0.02 TMC-1 NRO 45m Ohi98 Ohi98
  40232.796   CH2CN Cyanomethyl 2-1 3/2-1/2 3/2-1/2 5/2-3/2 0.038 TMC-1 NRO 45m Irv88a Irv88a
  40239.188   CH2CN Cyanomethyl 2-1 5/2-3/2 7/2-5/2 5/2-3/2 0.112 TMC-1 NRO 45m Irv88a Irv88a
  40239.684   CH2CN Cyanomethyl 2-1 5/2-3/2 7/2 5/2 7/2-5/2 0.141 TMC-1 NRO 45m Irv88a Irv88a
  40239.993   CH2CN Cyanomethyl 2-1 5/2-3/2 7/2 5/2 9/2-7/2 0.241 TMC-1 NRO 45m Irv88a Irv88a
  40240.520   CH2CN Cyanomethyl 2-1 5/2-3/2 5/2-5/2 7/2-7/2 0.062 TMC-1 NRO 45m Irv88a Irv88a
  40241.356   CH2CN Cyanomethyl 2-1 5/2-3/2 5/2-3/2 3/2-1/2 0.04 TMC-1 NRO 45m Ohi98 Ohi98
  40241.360   CH2CN Cyanomethyl 2-1 5/2-3/2 3/2-3/2 3/2-5/2 b TMC-1 NRO 45m Irv88a Irv88a
  40241.360   CH2CN Cyanomethyl 2-1 5/2-3/2 5/2-3/2 3/2-1/2 0.034 TMC-1 NRO 45m Irv88a Irv88a
  40242.208   CH2CN Cyanomethyl 2-1 5/2-3/2 5/2-3/2 5/2-3/2 0.066 TMC-1 NRO 45m Irv88a Irv88a
  40243.207   CH2CN Cyanomethyl 2-1 5/2-3/2 3/2-3/2 5/2-3/2 0.103 TMC-1 NRO 45m Irv88a Irv88a
  40243.207   CH2CN Cyanomethyl 2-1 5/2-3/2 5/2-5/2 3/2-5/2 b TMC-1 NRO 45m Irv88a Irv88a
  40244.330   CH2CN Cyanomethyl 2-1 5/2-3/2 5/2-3/2 7/2-5/2 0.098 TMC-1 NRO 45m Irv88a Irv88a
  40247.556   CH2CN Cyanomethyl 2-1 3/2-1/2 5/2-3/2 5/2-3/2 b TMC-1 NRO 45m Irv88a Irv88a
  40247.556   CH2CN Cyanomethyl 2-1 3/2-3/2 5/2-3/2 7/2-5/2 0.206b TMC-1 NRO 45m Irv88a Irv88a
  40247.849   CH2CN Cyanomethyl 2-1 5/2-3/2 3/2-1/2 3/2-1/2 0.04 TMC-1 NRO 45m Ohi98 Ohi98
  40248.212   CH2CN Cyanomethyl 2-1 5/2-3/2 5/2-5/2 3/2-3/2 0.02 TMC-1 NRO 45m Ohi98 Ohi98
  40248.588   CH2CN Cyanomethyl 2-1 3/2-1/2 5/2-3/2 3/2-1/2 0.05 TMC-1 NRO 45m Ohi98 Ohi98
  40249.341   CH2CN Cyanomethyl 2-1 3/2-1/2 1/2-1/2 3/2-3/2 0.03 TMC-1 NRO 45m Ohi98 Ohi98
  40250.438   CH2CN Cyanomethyl 2-1 3/2-1/2 3/2-1/2 1/2-1/2 0.02 TMC-1 NRO 45m Ohi98 Ohi98
  40251.887   CH2CN Cyanomethyl 2-1 3/2-1/2 5/2-3/2 5/2-5/2 0.03 TMC-1 NRO 45m Ohi98 Ohi98
  40253.903   CH2CN Cyanomethyl 2-1 3/2-1/2 5/2-3/2 3/2-3/2 0.02 TMC-1 NRO 45m Ohi98 Ohi98
  40256.270   CH2CN Cyanomethyl 2-1 3/2-1/2 3/2-3/2 3/2-3/2 0.03 TMC-1 NRO 45m Ohi98 Ohi98
  40256.813   CH2CN Cyanomethyl 2-1 3/2-3/2 3/2-3/2 5/2-5/2 0.05 TMC-1 NRO 45m Ohi98 Ohi98
  40258.143   CH2CN Cyanomethyl 2-1 5/2-1/2 3/2-3/2 1/2-1/2 0.02 TMC-1 NRO 45m Ohi98 Ohi98
  40260.256   CH2CN Cyanomethyl 2-1 3/2-1/2 1/2-1/2 1/2-3/2 0.02 TMC-1 NRO 45m Ohi98 Ohi98
  40417.945* (11) CH2CO Ethanone (ketene) 2(0,2)-1(0,1) 0.08 TMC-1 NRO 45m Ohi98  
  40465.013* ( 2) CCCS 3-Thioxo-1,2-propadienylidene 7-6 0.88 TMC-1 NRO 45m Kai87  
  40471.40 * (59) C6H 1,3,5-Hexatriynyl 21/2 J=29/2-27/2 e 0.020 IRC+10216 NRO 45m Kaw95 JPL01
  40479.254* (10) C8H 1,3,5,7-Octatetraynyl 23/2 34.5-33.5 e 0.15fb IRC+10216 IRAM 30m Cer96 McC97
  40479.895* (10) C8H 1,3,5,7-Octatetraynyl 23/2 34.5-33.5 f b IRC+10216 IRAM 30m Cer96 McC97
  40501.74 * (60) C6H 1,3,5-Hexatriynyl 21/2 J=29/2-27/2 f 0.025 IRC+10216 NRO 45m Kaw95 JPL01
  40576.729* ( 5) C5H 2,4-Pentadiynylidyne 21/2 J=17/2-15/2 F=9-8 f 0.04 TMC-1 NRO 45m Ohi98 Ohi98
  40576.931* ( 5) C5H 2,4-Pentadiynylidyne 21/2 J=17/2-15/2 F=8-7 f 0.05 TMC-1 NRO 45m Ohi98 Ohi98
  40580.866* ( 5) C5H 2,4-Pentadiynylidyne 21/2 J=17/2-15/2 F=9-8 e 0.07 TMC-1 NRO 45m Ohi98 Ohi98
  40581.077* ( 5) C5H 2,4-Pentadiynylidyne 21/2 J=17/2-15/2 F=8-7 e 0.08 TMC-1 NRO 45m Ohi98 Ohi98
  40607.333* ( 8) HC7N 2,4,6-Heptatriynenitrile 36-35 0.093 IRC+10216 NRO 45m Kaw95  
  40671.388* (20) HC9N 2,4,6,8-Nonatetraynenitrile 70-69 0.020 IRC+10216 NRO 45m Kaw95  
  40673.413* (14) DC5N 2,4-Pentadiynenitrile(cyanobutadiyne) 16-15 0.05 TMC-1 NRO 45m Ohi98  
  40714.164* (40) CH3C4H 1,3-Pentadiyne (methyl diacetylene) 10(1)-9(1) 0.10 TMC-1 NRO 45m Ohi98  
  40714.561* (41) CH3C4H 1,3-Pentadiyne (methyl diacetylene) 10(0)-9(0) 0.12 TMC-1 NRO 45m Ohi98  
  40793.839* (10) CH2CO Ethanone (ketene) 2(1,1)-1(1,0) 0.11 TMC-1 NRO 45m Ohi98  
  40854.363* (29) C5H 2,4-Pentadiynylidyne 23/2 J=17/2-15/2 F=8-7 b IRC+10216 NRO 45m Kaw95 JPL01
  40854.775* (27) C5H 2,4-Pentadiynylidyne 23/2 J=17/2-15/2 F=9-8 0.047b IRC+10216 NRO 45m Kaw95 JPL01
  40854.796* (29) C5H 2,4-Pentadiynylidyne 23/2 J=17/2-15/2 F=8-7 b IRC+10216 NRO 45m Kaw95 JPL01
  40855.210* (27) C5H 2,4-Pentadiynylidyne 23/2 J=17/2-15/2 F=9-8 b IRC+10216 NRO 45m Kaw95 JPL01
U 40880.0   unidentified unidentified transition   0.07 Sgr B2(M) NRAO 11m Kut80  
  41198.320* (14) H2CCC Propadienylidene 2(1,2)-1(1,1) 0.17 TMC-1 NRO 45m Ohi98  
U 41305.4   unidentified unidentified transition B1377 15-14 0.025 IRC+10216 NRO 45m Kaw95  
  41313.996* ( 6) CH3CCCN 2-Butynenitrile 10(1)-9(1) 0.08 TMC-1 NRO 45m Ohi98  
  41314.394* ( 6) CH3CCCN 2-Butynenitrile 10(0)-9(0) 0.09 TMC-1 NRO 45m Ohi98  
  41493.180* ( 8) H13CCCCCN 2,4-Pentadiynenitrile(cyanobutadiyne) 16-15 0.05 TMC-1 NRO 45m Ohi98  
  41579.445* (10) c-C2H4O Oxirane (ethylene oxide) 4(2,2)-4(1,3) 0.05 Sgr B2(N) NRO 45m Dic97  
  41584.627* ( 9) H2CCC Propadienylidene 2(0,2)-1(0,1) 0.11 TMC-1 NRO 45m Ohi98  
  41652.515* (10) C8H 1,3,5,7-Octatetraynyl 23/2 35.5-34.5 e 0.23fb IRC+10216 IRAM 30m Cer96 McC97
  41653.194* (10) C8H 1,3,5,7-Octatetraynyl 23/2 35.5-34.5 f b IRC+10216 IRAM 30m Cer96 McC97
U 41712.1   unidentified unidentified transition   0.012 IRC+10216 NRO 45m Kaw95  
  41735.271* ( 8) HC7N 2,4,6-Heptatriynenitrile 37-36 0.085 IRC+10216 NRO 45m Kaw95  
  41735.271* ( 9) HC7N 2,4,6-Heptatriynenitrile 37-36 0.12 TMC-1 NRO 45m Ohi98  
  41967.661* (11) H2CCC Propadienylidene 2(1,1)-1(1,0) 0.20 TMC-1 NRO 45m Ohi98  
  42215.539* ( 5) DC3N 2-Propynenitrile (cyanoacetylene) 5-4 F=4-3 b TMC-1 FCRAO 14m Lan80 Laf78
  42215.590* ( 5) DC3N 2-Propynenitrile (cyanoacetylene) 5-4 F=5-4 0.14b TMC-1 FCRAO 14m Lan80 Laf78
  42215.613* ( 5) DC3N 2-Propynenitrile (cyanoacetylene) 5-4 F=6-5 b TMC-1 FCRAO 14m Lan80 Laf78
  42373.365* (22) 30SiO Silicon monoxide 1-0 v=0 28. e VY CMa CAdY 13.7m Bar89  
  42519.373* (27) SiO Silicon monoxide 1-0 v=3 2.0 VX Sgr IRT 13.7m Sca78  
  42558.044* (14) HCC13CCCN 2,4-Pentadiynenitrile(cyanobutadiyne) 16-15 0.010 IRC+10216 NRO 45m Kaw95  
  42563.241* (15) HCCC13CCN 2,4-Pentadiynenitrile(cyanobutadiyne) 16-15 0.015 IRC+10216 NRO 45m Kaw95  
  42563.241* (15) HCCC13CCN 2,4-Pentadiynenitrile(cyanobutadiyne) 16-15 0.04 TMC-1 NRO 45m Ohi98  
  42602.153* ( 2) HC5N 2,4-Pentadiynenitrile(cyanobutadiyne) 16-15 0.40 TMC-1 NEROC 37m Irv83  
  42674.197* ( 7) HCS+ Thioxomethylium (thioformylium) 1-0 0.085 TMC-1 NEROC 37m Irv83  
  42820.582* (23) SiO Silicon monoxide 1-0 v=2 15.i VY CMa NRAO 11m Buh74  
  42863.206* (10) HC7N 2,4,6-Heptatriynenitrile 38-37 0.086 IRC+10216 NRO 45m Kaw95  
  42863.206* (10) HC7N 2,4,6-Heptatriynenitrile 38-37 0.11 TMC-1 NRO 45m Ohi98  
  42879.922* (22) 29SiO Silicon monoxide 1-0 v=0 3.1e VY CMa CAdY 13.7m Bar89  
  42944.988* ( 3) SiC4 Silicon tetracarbide 14-13 0.74f TMC-1 NRO 45m Ohi89  
  42970.453 (30) C6H 1,3,5-Hexatriynyl 31/2-29/2 e 0.108 TMC-1 NRO 45m Suz86 Suz86
  42977.115 (30) C6H 1,3,5-Hexatriynyl 31/2-29/2 f 0.13 TMC-1 NRO 45m Suz86 Suz86
  42995.321* (24) HC9N 2,4,6,8-Nonatetraynenitrile 74-73 0.01 IRC+10216 NRO 45m Kaw95  
  43122.079* (21) SiO Silicon monoxide 1-0 v=1 29.i OriMC-1 NRAO 11m Sny75  
  43263.11 * (29) C6H 1,3,5-Hexatriynyl 21/2 J=31/2-29/2 e 0.028 IRC+10216 NRO 45m Kaw95 JPL01
  43289.809 (20) HCCCNH+ Protonated 2-propynenitrile 4-3 0.048 TMC-1 NRO 45m Kaw94 Kaw94
  43294.04 * (29) C6H 1,3,5-Hexatriynyl 21/2 J=31/2-29/2 f 0.022 IRC+10216 NRO 45m Kaw95 JPL01
  43423.864* (22) SiO Silicon monoxide 1-0 v=0 0.50 OriMC-1 NEROC 37m Sny78  
  43624.353* (10) HCCN Cyanomethylene 3,2-2,1 0.016 IRC+10216 IRAM 30m Gué91  
  43962.014* ( 8) HNCO Isocyanic acid 2(0,2)-1(0,1) F=1-1 0.05 TMC-1 NRO 45m Ohi98  
  43962.998* ( 2) HNCO Isocyanic acid 2(0,2)-1(0,1) F=3-2 <1b Sgr B2(M) NRAO 11m Sny72 Win76
  43963.042* ( 2) HNCO Isocyanic acid 2(0,2)-1(0,1) F=2-1 b Sgr B2(M) NRAO 11m Sny72 Win76
  43963.659* ( 5) HNCO Isocyanic acid 2(0,2)-1(0,1) F=1-0, 2-2 0.07 TMC-1 NRO 45m Ohi98  
  43981.024* ( 5) CCS Thioxoethenylidene 3,4-2,3 0.38 TMC-1 NRO 45m Kai87  
  43991.137* (11) HC7N 2,4,6-Heptatriynenitrile 39-38 0.064 IRC+10216 NRO 45m Kaw95  
  43991.137* (11) HC7N 2,4,6-Heptatriynenitrile 39-38 0.08 TMC-1 NRO 45m Ohi98  
U 44059.1   unidentified unidentified transition B1377 16-15 0.020 IRC+10216 NRO 45m Kaw95  
  44069.476* (15) CH3OH Methanol (methyl alcohol) 7(0,7)-6(1,6) A+ 3.9 Sgr B2(M) NRO 45m Mor85 Xu_97
  44084.172* (13) H13CCCN 2-Propynenitrile (cyanoacetylene) 5-4 0.066 IRC+10216 NRO 45m Kaw95  
  44084.172* (13) H13CCCN 2-Propynenitrile (cyanoacetylene) 5-4 0.17 TMC-1 NRO 45m Ohi98 Laf78
  44104.781* ( 3) c-C3H2 Cyclopropenylidene 3(2,1)-3(1,2) 0.025 IRC+10216 NRO 45m Kaw95  
  44167.274* (10) HCCC15N 2-Propynenitrile (cyanoacetylene) 5-4 0.08 TMC-1 NRO 45m Ohi98 Laf78
  44471.139* ( 9) H2CCCC Butatrienylidene 5(1,5)-4(1,4) 0.018 IRC+10216 NRO 45m Kaw95  
  44471.139* ( 9) H2CCCC Butatrienylidene 5(1,5)-4(1,4) 0.28 TMC-1 NRO 45m Ohi98  
  44497.600* ( 8) CC34S Thioxoethenylidene 4,3-3,2 0.13 L1498 NRO 45m Yam90  
U 44507.7   unidentified unidentified transition (U48292.3 USB) 0.06 OriMC-1 NRO 45m Sai89  
  44596.992* ( 4) CH3CH2CN Propanenitrile (ethyl cyanide) 5(0,5)-4(0,4) 0.31 OriMC-1 NRO 45m Sai89  
  44659.020* ( 9) H2CCCC Butatrienylidene 5(0,5)-4(0,4) 0.14 TMC-1 NRO 45m Ohi98  
  44730.271* ( 4) CH3CH2CN Propanenitrile (ethyl cyanide) 5(2,4)-4(2,3) 0.23 OriMC-1 NRO 45m Sai89  
  44785.538* (56) CH3C4H 1,3-Pentadiyne (methyl diacetylene) 11(1)-10(1) 0.04 TMC-1 NRO 45m Ohi98  
  44785.931* (57) CH3C4H 1,3-Pentadiyne (methyl diacetylene) 11(0)-10(0) 0.05 TMC-1 NRO 45m Ohi98  
  44844.592* (10) H2CCCC Butatrienylidene 5(1,4)-4(1,3) 0.020 IRC+10216 NRO 45m Kaw95  
  44844.592* (10) H2CCCC Butatrienylidene 5(1,4)-4(1,3) 0.19 TMC-1 NRO 45m Ohi98  
U 44864.5   unidentified unidentified transition (U47935.5 USB) 0.04 OriMC-1 NRO 45m Sai89  
  44878.104* ( 4) CH3CH2CN Propanenitrile (ethyl cyanide) 5(2,3)-4(2,2) 0.30 OriMC-1 NRO 45m Sai89  
  44911.75 ( 1) HCOOH Formic acid 2(0,2)-1(0,1) 0.044 L134N NRO 45m Irv90 Bel71
  44955.778* (12) CH3OH Methanol (methyl alcohol) 2(0,2)-3(1,3) E t=1 0.85 OriMC-1 NRO 45m Sai89 Xu_97
U 45033.5   unidentified unidentified transition (U47976.5 USB) 0.10 OriMC-1 NRO 45m Sai89  
  45103.868* ( 6) c-H13CCCH Cyclopropenylidene 2(1,1)-2(0,2) 0.09 TMC-1 NRO 45m Ohi98  
  45119.064* (12) HC7N 2,4,6-Heptatriynenitrile 40-39 0.105 CRL 2688 NRO 45m Fuk94  
  45259.076* ( 5) NaCN Sodium cyanide 3(1,3)-2(1,2) 0.020 IRC+10216 NRO 45m Kaw95  
  45264.720* ( 2) HC5N 2,4-Pentadiynenitrile(cyanobutadiyne) 17-16 0.83 TMC-1 NRAO 11m Buj81  
  45297.346* (14) HC13CCN 2-Propynenitrile (cyanoacetylene) 5-4 0.22 TMC-1 NRO 45m Tak98  
  45301.707* ( 7) HCC13CN 2-Propynenitrile (cyanoacetylene) 5-4 0.34 TMC-1 NRO 45m Tak98  
  45350.68 * ( 3) C5H 2,4-Pentadiynylidyne 21/2 J=19/2-17/2 e F=10-9 b IRC+10216 NRO 45m Kaw95 JPL01
  45350.73 * ( 3) C5H 2,4-Pentadiynylidyne 21/2 J=19/2-17/2 e F=9-8 0.047b IRC+10216 NRO 45m Kaw95 JPL01
  45354.92 * ( 3) C5H 2,4-Pentadiynylidyne 21/2 J=19/2-17/2 f F=10-9 b IRC+10216 NRO 45m Kaw95 JPL01
  45354.97 * ( 3) C5H 2,4-Pentadiynylidyne 21/2 J=19/2-17/2 f F=9-8 b IRC+10216 NRO 45m Kaw95 JPL01
  45379.029* ( 2) CCS Thioxoethenylidene 4,3-3,2 2.23 TMC-1 NRO 45m Suz84  
  45488.839* ( 1) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 F=5-5 0.37 TMC-1 NRO 45m Ohi98 Laf78
  45490.264* ( 1) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 F=4-3 b Sgr B2(M) NRAO 11m Mor76 Laf78
  45490.316* ( 1) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 F=5-4 2.05j Sgr B2(M) NRAO 11m Mor76 Laf78
  45490.340* ( 1) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 F=6-5 b Sgr B2(M) NRAO 11m Mor76 Laf78
  45492.110* ( 1) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 F=4-4 0.37 TMC-1 NRO 45m Ohi98 Laf78
  45564.872* (24) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 6=1 =1e 1.1f G10.47+0.03 MPI 100m Wyr99 Laf78
  45600.738* (25) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 6=1 =1f b G10.47+0.03 MPI 100m Wyr99 Laf78
  45602.145* (25) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 7=1 =1e 7.1bf G10.47+0.03 MPI 100m Wyr99 Laf78
  45660.66 * ( 1) C5H 2,4-Pentadiynylidyne 23/2 J=19/2-17/2 e F=9-8 b IRC+10216 NRO 45m Kaw95 JPL01
  45660.98 * ( 1) C5H 2,4-Pentadiynylidyne 23/2 J=19/2-17/2 e F=10-9 0.057b IRC+10216 NRO 45m Kaw95 JPL01
  45661.21 * ( 1) C5H 2,4-Pentadiynylidyne 23/2 J=19/2-17/2 f F=9-8 b IRC+10216 NRO 45m Kaw95 JPL01
  45661.52 * ( 1) C5H 2,4-Pentadiynylidyne 23/2 J=19/2-17/2 f F=10-9 b IRC+10216 NRO 45m Kaw95 JPL01
  45667.519* (16) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 7=1 =1f 5.7f G10.47+0.03 MPI 100m Wyr99 Laf78
  45727.13 * ( 5) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 6=1 7=1 =0+ b G10.47+0.03 MPI 100m Wyr99 Wyr99
  45727.49 * (10) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 6=1 7=1 =0- b G10.47+0.03 MPI 100m Wyr99 Wyr99
  45729.40 * ( 5) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 6=1 7=1 =2- b G10.47+0.03 MPI 100m Wyr99 Wyr99
  45729.48 * (10) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 6=1 7=1 =2+ 4.7bf G10.47+0.03 MPI 100m Wyr99 Wyr99
  45742.443* (58) C6H 1,3,5-Hexatriynyl 23/2 J=33/2-31/2 f F=17-16 0.056b IRC+10216 NRO 45m Kaw95 JPL01
  45742.521* (40) C6H 1,3,5-Hexatriynyl 23/2 J=33/2-31/2 f F=16-15 b IRC+10216 NRO 45m Kaw95 JPL01
  45750.040* (40) C6H 1,3,5-Hexatriynyl 23/2 J=33/2-31/2 e F=17-16 0.056b IRC+10216 NRO 45m Kaw95 JPL01
  45750.061* (40) C6H 1,3,5-Hexatriynyl 23/2 J=33/2-31/2 e F=16-15 b IRC+10216 NRO 45m Kaw95 JPL01
  45778.864* (28) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 7=2 =2e b G10.47+0.03 MPI 100m Wyr99 Laf78
  45779.105* (26) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 7=2 =0 4.5bf G10.47+0.03 MPI 100m Wyr99 Laf78
  45779.167* (28) HCCCN 2-Propynenitrile (cyanoacetylene) 5-4 7=2 =2f b G10.47+0.03 MPI 100m Wyr99 Laf78
  45826.733* ( 4) CCO Oxoethenylidene 3,2-2,1 0.050 TMC-1 NRO 45m Ohi91  
  46012.386* ( 3) SiC4 Silicon tetracarbide 15-14 b TMC-1 NRO 45m Ohi89  
  46054.76 * (28) C6H 1,3,5-Hexatriynyl 21/2 J=33/2-31/2 e 0.029 IRC+10216 NRO 45m Kaw95 JPL01
  46086.32 * (29) C6H 1,3,5-Hexatriynyl 21/2 J=33/2-31/2 f 0.033 IRC+10216 NRO 45m Kaw95 JPL01
  46245.621* ( 5) CCCS 3-Thioxo-1,2-propadienylidene 8-7 0.84 TMC-1 NRO 45m Kai87  
  46246.988* (13) HC7N 2,4,6-Heptatriynenitrile 41-40 0.05 TMC-1 NRO 45m Ohi98  
  46247.580* (10) 13CS Carbon monosulfide 1-0 0.148 Sgr B2(M) NRAO 11m Tur73  
  46266.934* ( 1) CH2CHCN 2-Propenenitrile (vinyl cyanide) 5(1,5)-4(1,4) 0.10 TMC-1 NRO 45m Ohi98  
  46683.086 (20) HNCCC 3-Imino-1,2-propadienylidene 5-4 0.30 TMC-1 NRO 45m Kaw92a Kaw92a
  46755.614* ( 3) c-C3H2 Cyclopropenylidene 2(1,1)-2(0,2) 1.00 TMC-1 NRO 45m Suz85  
U 46812.8   unidentified unidentified transition B1377 17-16 0.025 IRC+10216 NRO 45m Kaw95  
  46847.734* ( 3) NaCN Sodium cyanide 3(0,3)-2(0,2) 0.020 IRC+10216 NRO 45m Kaw95  
  47064.813* (16) SiC2 Silicon carbide (silacyclopropyne) 2(0,2)-1(0,1) 0.233 IRC+10216 NRO 45m Kaw95  
  47094.974* (10) c-C2H4O Oxirane (ethylene oxide) 4(4,1)-4(3,2) 0.05 Sgr B2(N) NRO 45m Dic97  
  47354.648* ( 1) CH2CHCN 2-Propenenitrile (vinyl cyanide) 5(0,5)-4(0,4) 0.18 TMC-1 NRO 45m Ohi98  
  47374.907* (14) HC7N 2,4,6-Heptatriynenitrile 42-41 0.078 IRC+10216 NRO 45m Kaw95  
U 47408.5   unidentified unidentified transition   0.026 IRC+10216 NRO 45m Kaw95  
U 47423.6   unidentified unidentified transition   0.029 IRC+10216 NRO 45m Kaw95  
  47436.151* (32) HC13CCCCN 2,4-Pentadiynenitrile(cyanobutadiyne) 18-17 0.022 IRC+10216 NRO 45m Kaw95  
  47534.069* (16) CH3OCHO Methyl formate 4(0,4)-3(0,3) E 0.25 OriMC-1 NRO 45m Sai89 Oes99
  47536.941* (16) CH3OCHO Methyl formate 4(0,4)-3(0,3) A 0.23 OriMC-1 NRO 45m Sai89 Oes99
  47556.928* (16) c-C2H4O Oxirane (ethylene oxide) 5(5,0)-5(4,1) 0.12 Sgr B2(N) NRO 45m Dic97  
  47566.80 * ( 2) C4H 1,3-Butadiynyl 11/2-9/2 0.10 Sgr B2(M) NRO 45m Sai89  
  47595.991* ( 3) C4H 1,3-Butadiynyl J=9/2-9/2 F=4-4 0.06 TMC-1 NRO 45m Ohi98 JPL01
  47605.49 * ( 2) C4H 1,3-Butadiynyl 9/2-7/2 0.09 Sgr B2(M) NRO 45m Sai89  
  47643.113* (34) HC9N 2,4,6,8-Nonatetraynenitrile 82-81 0.02 IRC+10216 NRO 45m Kaw95  
  47660.624* ( 2) SO2 Sulfur dioxide 31(5,27)-30(6,24) 0.08 OriMC-1 NRO 45m Sai89  
  47674.961* ( 2) CH3OCH3 Dimethyl ether 1(1,1)-0(0,0) EE 0.09 OriMC-1 NRO 45m Sai89 Gro98
  47726.482* (10) 24MgNC Magnesium isocyanide 7/2,4-5/2,3 0.030 IRC+10216 NRO 45m Kaw95  
  47741.702* (10) 24MgNC Magnesium isocyanide 9/2,4-7/2,3 0.039 IRC+10216 NRO 45m Kaw95  
  47746.980* ( 5) CH3CHO Acetaldehyde (ethanal) 1(1,0) - 1(0,1) E 0.06 Sgr B2(M) NRO 45m Sai89 Kle96
  47752.82 * ( 1) DCOOH Formic acid 1(1,0)-1(0,1) 0.13 OriMC-1 NRO 45m Sai89 Wil80
  47820.620* ( 4) CH3CHO Acetaldehyde (ethanal) 1(1,0) - 1(0,1) A++ 0.06 Sgr B2(M) NRO 45m Sai89 Kle96
  47913.426* ( 2) SO2 Sulfur dioxide 14(2,12)-13(3,11) 1.15 OriMC-1 NRO 45m Sai89  
  47927.275* ( 2) HC5N 2,4-Pentadiynenitrile(cyanobutadiyne) 18-17 1.50 TMC-1 NRO 45m Suz84a  
U 47935.5   unidentified unidentified transition (U44864.5 LSB) 0.04 OriMC-1 NRO 45m Sai89  
U 47976.5   unidentified unidentified transition (U45033.5 LSB) 0.10 OriMC-1 NRO 45m Sai89  
  48108.475* ( 5) CCCO 3-Oxo-1,2-propadienylidene 5-4 0.158 TMC-1 NRO 45m Suz84a  
  48120.435* ( 3) SO2 Sulfur dioxide 21(2,20)-20(3,17) 0.39 OriMC-1 NRO 45m Sai89  
  48178.333* ( 6) CH3OH Methanol (methyl alcohol) 1(0,1)-0(0,0) E t=2 0.03 OriMC-1 NRO 45m Sai89 And90
  48192.12 (10) CH3OH Methanol (methyl alcohol) 1(0,1)-0(0,0) A+ t=2 0.06 OriMC-1 NRO 45m Sai89 Ven55
  48206.946* ( 4) C34S Carbon monosulfide 1-0 0.380 DR21(OH) NRAO 11m Tur73  
  48247.572* ( 2) CH3OH Methanol (methyl alcohol) 1(0,1)-0(0,0) E t=1 0.23 OriMC-1 NRO 45m Sai89 Xu_97
  48257.302* ( 4) CH3OH Methanol (methyl alcohol) 1(0,1)-0(0,0) A+ t=1 0.09 OriMC-1 NRO 45m Sai89 Xu_97
  48284.520* ( 3) H2CO Formaldehyde (methanal) 4(1,3)-4(1,4) 0.63 OriMC-1 NRAO 11m Hol77  
U 48292.3   unidentified unidentified transition (U44507.7 LSB) 0.06 OriMC-1 NRO 45m Sai89  
  48372.4670 ( 2) CH3OH Methanol (methyl alcohol) 1(0,1)-0(0,0) A+ 0.44 OriMC-1 NRAO 11m Hol77 Heu73
  48376.889* ( 1) CH3OH Methanol (methyl alcohol) 1(0,1)-0(0,0) E 0.29 OriMC-1 NRAO 11m Hol77 Xu_97
  48502.823* (15) HC7N 2,4,6-Heptatriynenitrile 43-42 0.105 IRC+10216 NRO 45m Kaw95  
  48514.59 * ( 2) C6H 1,3,5-Hexatriynyl 23/2 J=35/2-33/2 f 0.064 IRC+10216 NRO 45m Kaw95 JPL01
  48523.04 * ( 2) C6H 1,3,5-Hexatriynyl 23/2 J=35/2-33/2 e 0.066 IRC+10216 NRO 45m Kaw95 JPL01
  48548.217* ( 5) NaCN Sodium cyanide 3(1,2)-2(1,1) 0.025 IRC+10216 NRO 45m Kaw95  
  48552.562* ( 1) CH2CHCN 2-Propenenitrile (vinyl cyanide) 5(1,4)-4(1,3) 0.07 TMC-1 NRO 45m Ohi98  
  48583.290 (30) C33S Carbon monosulfide 1-0 F=1/2-3/2 b Sgr B2(M) NRAO 11m Tur73 Bog81
  48585.918 (30) C33S Carbon monosulfide 1-0 F=5/2-3/2 <0.12b Sgr B2(M) NRAO 11m Tur73 Bog81
  48589.074 (30) C33S Carbon monosulfide 1-0 F=3/2-3/2 b Sgr B2(M) NRAO 11m Tur73 Bog81
U 48593.4   unidentified unidentified transition   0.027 IRC+10216 NRO 45m Kaw95  
U 48602.2   unidentified unidentified transition   0.023 IRC+10216 NRO 45m Kaw95  
  48651.6043 (10) OCS Carbon oxide sulfide 4-3 0.45 Sgr B2(M) NRAO 11m Hol77 Dub80
  48846.36 * (27) C6H 1,3,5-Hexatriynyl 21/2 J=35/2-33/2 e 0.064 IRC+10216 NRO 45m Kaw95 JPL01
  48878.59 * (28) C6H 1,3,5-Hexatriynyl 21/2 J=35/2-33/2 f 0.066 IRC+10216 NRO 45m Kaw95 JPL01
  48990.957* ( 2) CS Carbon monosulfide 1-0 3.53 OriMC-1 NRAO 11m Tur73  
  49079.763* ( 3) SiC4 Silicon tetracarbide 16-15 0.37f TMC-1 NRO 45m Ohi89  
U 49148.1   unidentified unidentified transition   0.013 IRC+10216 NRO 45m Kaw95  
  49272.919* (22) H13CCCCCN 2,4-Pentadiynenitrile(cyanobutadiyne) 19-18 0.030 IRC+10216 NRO 45m Kaw95  
  49466.413* (12) CCCN Cyanoethynyl 5-4 J=11/2-9/2 F=11/2-9/2 b TMC-1 NRO 45m Ohi98 Got83
  49466.413* (12) CCCN Cyanoethynyl 5-4 J=11/2-9/2 F=9/2-7/2 b TMC-1 NRO 45m Ohi98 Got83
  49466.461* (12) CCCN Cyanoethynyl 5-4 J=11/2-9/2 F=13/2-11/2 0.19b TMC-1 NRO 45m Ohi98 Got83
  49485.197* (12) CCCN Cyanoethynyl 5-4 J=9/2-7/2 F=7/2-5/2 b TMC-1 NRO 45m Ohi98 Got83
  49485.247* (12) CCCN Cyanoethynyl 5-4 J=9/2-7/2 F=11/2-9/2 0.18b TMC-1 NRO 45m Ohi98 Got83
  49485.247* (12) CCCN Cyanoethynyl 5-4 J=9/2-7/2 F=9/2-7/2 b TMC-1 NRO 45m Ohi98 Got83
U 49566.1   unidentified unidentified transition B1377 18-17 0.030 IRC+10216 NRO 45m Kaw95  
  49630.734* (17) HC7N 2,4,6-Heptatriynenitrile 44-43 0.082 IRC+10216 NRO 45m Kaw95  
  49678.071* ( 5) HCCNC Ethyne, isocyanide 5-4 0.56 TMC-1 NRO 45m Kaw92  
  49865.226* (12) C8H 1,3,5,7-Octatetraynyl 23/2 42.5-41.5 e 0.29fb IRC+10216 IRAM 30m Cer96 McC97
  49866.198* (12) C8H 1,3,5,7-Octatetraynyl 23/2 42.5-41.5 f b IRC+10216 IRAM 30m Cer96 McC97
  51841.418* ( 4) c-C3H2 Cyclopropenylidene 1(1,1)-0(0,0) 1.5 TMC-1 FCRAO 14m Mad86a  


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