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Compare Bonds

18 10 26 16 45

HF/SDD for rCH

Histogram of Bond length differences (in Å) vs number of species


Differences greater than 5.500 are in the 5.500 bin. Differences less than -0.500 are in the -0.500 bin.

histogram chart 400
histogram chart 350 histogram chart
histogram chart 300 histogram chart
histogram chart 250 histogram chart
histogram chart 200 histogram chart
histogram chart 150 histogram chart
histogram chart 100 histogram chart
histogram chart 50 histogram chart
histogram chart 0 histogram chart histogram chart histogram chart histogram chart
-0.500 0.000 0.500 1.000 1.500 2.000 2.500 3.000 3.500 4.000 4.500 5.000 5.500
bond length difference calc. - exp. (Å)

  Species Name Difference (Å)
Most negative difference C3H5Cl3 Propane, 1,2,3-trichloro--0.057
Most positive difference C4H6 1-Methylcyclopropene3.108

Bond lengths
Click on entry for experimental details.

Species Name Experimental (Å) Difference (Å)
C3H5Cl3 Propane, 1,2,3-trichloro- 1.131 -0.057
C3H8O2 1,3-Propanediol 1.140 -0.057
C6H6 Fulvene 1.130 -0.056
C2H2O2 Ethanedial 1.132 -0.049
C5H8O Methyl cyclopropyl ketone 1.126 -0.047
CH3CONH2 Acetamide 1.124 -0.046
CHOCH(CH3)CH3 Propanal, 2-methyl- 1.127 -0.043
CH2SHCH2SH 1,2-Ethanedithiol 1.120 -0.043
C2H6N2O2 Dimethylnitroamine 1.121 -0.041
CHBr3 bromoform 1.110 -0.041
CH2ClCHClCH3 Propane, 1,2-dichloro- 1.113 -0.040
CH2ClCH2Cl Ethane, 1,2-dichloro- 1.112 -0.038
C3H6S3 1,3,5-Trithiane 1.114 -0.037
CH2ClCH2CH3 Propane, 1-chloro- 1.113 -0.037
C2H3CCH 1-Buten-3-yne 1.090 -0.037
C4H5N Cyclopropanecarbonitrile 1.107 -0.036
C4H6O2 2,3-Butanedione 1.114 -0.035
C3H7NO dimethylformamide 1.112 -0.035
C2HF3 Trifluoroethylene 1.100 -0.034
CH2ClCH2CH2CH3 Butane, 1-chloro- 1.110 -0.034
C5H6 Propellane 1.106 -0.034
HCONHCH3 N-methylformamide 1.114 -0.033
C7H16 heptane 1.121 -0.033
C2H3CCH 1-Buten-3-yne 1.106 -0.033
CH3CCCH3 2-Butyne 1.116 -0.033
C6H14 Hexane 1.118 -0.033
CHClCHCl Ethene, 1,2-dichloro-, (Z)- 1.101 -0.032
CH3OCl methyl hypochlorite 1.111 -0.032
C5H8 Spiropentane 1.105 -0.031
C4H10O2 Ethane, 1,2-dimethoxy- 1.109 -0.031
C5H12 Pentane 1.118 -0.030
C5H12O Butane, 1-methoxy- 1.115 -0.030
CH3CH2CH2CH3 Butane 1.117 -0.030
C5H10 Cyclopentane 1.114 -0.030
C6H12 (E)-3-methylpent-2-ene 1.116 -0.029
C7H12 Norbornane 1.113 -0.029
C5H10S 2H-Thiopyran, tetrahydro- 1.114 -0.029
Si(CH3)4 tetramethylsilane 1.115 -0.029
C5H10O 2-Butanone, 3-methyl- 1.113 -0.028
C6H8 (Z)-hexa-1,3,5-triene 1.104 -0.028
CH2CHCH2CH2Cl 1-Butene, 4-chloro- 1.102 -0.028
C5H12 Propane, 2,2-dimethyl- 1.114 -0.028
C5H10O 2H-Pyran, tetrahydro- 1.116 -0.028
C5H8 1,3-Butadiene, 2-methyl- 1.110 -0.028
C3H2N2 Malononitrile 1.109 -0.028
CH3CHClCH2CH3 Butane, 2-chloro- 1.110 -0.028
CH2CHOH ethenol 1.097 -0.028
C3H8O2 Methane, dimethoxy- 1.108 -0.028
CH2CClCHCH2 1,3-Butadiene, 2-chloro- 1.098 -0.028
C4H8O2 Ethyl acetate 1.105 -0.027
H2CO Formaldehyde 1.111 -0.027
CH3SH Methanethiol 1.104 -0.026
N(CH3)3 Trimethylamine 1.109 -0.026
CH3CH2CHO Propanal 1.115 -0.026
CH3CHO Acetaldehyde 1.114 -0.026
CH3COCl Acetyl Chloride 1.105 -0.026
C5H8 Ethenylcyclopropane 1.099 -0.026
CH2CHCHO Acrolein 1.113 -0.026
C5H8 1,4-Pentadiene 1.110 -0.025
C12H8 biphenylene 1.096 -0.024
C2H8N2 Ethylenediamine 1.109 -0.024
CH3OCHO methyl formate 1.101 -0.024
C6H5NO2 Nitrobenzene 1.093 -0.024
CH3CH2NH2 Ethylamine 1.107 -0.024
CH3COCH3 Acetone 1.103 -0.024
C3H6S Thietane 1.100 -0.023
CH3ONO Methyl nitrite 1.102 -0.023
CH3CN Acetonitrile 1.104 -0.023
C4H8O2 1,3-Dioxane 1.095 -0.023
CH3COOH Acetic acid 1.100 -0.023
CH2N2 diazirine 1.090 -0.022
C2H3Cl Ethene, chloro- 1.090 -0.022
CH2CF2 Ethene, 1,1-difluoro- 1.091 -0.022
CH3CCl2CH3 Propane, 2,2-dichloro- 1.101 -0.022
C8H8 cubane 1.097 -0.022
HCOOH Formic acid 1.097 -0.022
C2H2F2 Ethene, 1,2-difluoro-, (Z)- 1.089 -0.022
CH2NH Methanimine 1.103 -0.021
CH3CH(CH3)CH3 Isobutane 1.108 -0.021
C3H5ClO Oxirane, (chloromethyl)- 1.095 -0.021
C5H8O 2H-Pyran, 3,4-dihydro- 1.090 -0.021
CH3CH2CHO Propanal 1.103 -0.021
CHF2Cl difluorochloromethane 1.090 -0.020
CHF3 Methane, trifluoro- 1.091 -0.020
C4H6O Cyclobutanone 1.100 -0.020
CH3CHCl2 Ethane, 1,1-dichloro- 1.090 -0.020
C6H5CH2CH3 Ethylbenzene 1.094 -0.020
CHOCHCHCH3 2-Butenal 1.108 -0.020
C5H11N Piperidine 1.105 -0.020
HFCO formyl fluoride 1.095 -0.020
CH2O2 Dioxirane 1.090 -0.020
CHFClBr fluorochlorobromomethane 1.088 -0.020
C5H8 Bicyclo[2.1.0]pentane 1.095 -0.019
C4H8O2 1,3-Dioxolane, 2-methyl- 1.102 -0.019
C5H8 Cyclobutane, methylene- 1.101 -0.019
CH3NO3 Methyl nitrate 1.095 -0.019
CH2FCl fluorochloromethane 1.090 -0.019
C5H6S Thiophene, 3-methyl- 1.090 -0.019
CH3OH Methyl alcohol 1.096 -0.019
HCCl Chloromethylene 1.119 -0.018
C5H6 1-Buten-3-yne, 2-methyl- 1.091 -0.018
CH2BrF Methane, bromofluoro- 1.090 -0.018
C4H4N2 1,3-Diazine 1.087 -0.018
C4H6O Furan, 2,5-dihydro- 1.100 -0.018
C3H4N2 1H-Pyrazole 1.083 -0.018
CH3CH2CHO Propanal 1.105 -0.018
C3H6O 2-Propen-1-ol 1.092 -0.017
C2H4F2 1,2-difluoroethane 1.094 -0.017
CH3SSCH3 Disulfide, dimethyl 1.097 -0.017
HOCH2COOH Hydroxyacetic acid 1.097 -0.017
C3H8O2 Propylene glycol 1.095 -0.017
C3H4N2 1H-Pyrazole 1.082 -0.017
CH(CN)3 tricyanomethane 1.100 -0.017
CH3SCH2CH3 Ethane, (methylthio)- 1.097 -0.017
CH2PH Phosphaethene 1.090 -0.016
C2H3Br vinyl bromide 1.088 -0.016
CH2CS Thioketene 1.090 -0.016
CH2PH Phosphaethene 1.090 -0.016
CH2Cl2 Methylene chloride 1.085 -0.016
C2H5F fluoroethane 1.095 -0.016
C4H6 Methylenecyclopropane 1.090 -0.016
CH2CHF Ethene, fluoro- 1.087 -0.016
C4H6S Thiophene, 2,5-dihydro- 1.095 -0.016
C3H6O 2-Propen-1-ol 1.091 -0.016
CH3CH2OH Ethanol 1.098 -0.015
CH2NOH formaldoxime 1.086 -0.015
C3H6O 2-Propen-1-ol 1.102 -0.015
CH3Cl Methyl chloride 1.090 -0.015
C6H8 Bicyclo[3.1.0]hex-2-ene 1.089 -0.015
C3H3NO Oxazole 1.075 -0.015
C3H4N2 1H-Pyrazole 1.080 -0.015
CH3ONO Methyl nitrite 1.090 -0.015
C5H8 Bicyclo[2.1.0]pentane 1.085 -0.015
CH2C(CH3)OCH3 1-Propene, 2-methoxy- 1.087 -0.015
CH3CHClCH3 Propane, 2-chloro- 1.091 -0.015
CH2FCH2CH3 1-Fluoropropane 1.095 -0.015
C4H10O Propane, 2-methoxy- 1.095 -0.015
C2H6O2S Dimethyl sulfone 1.091 -0.015
CH3SOCH3 Dimethyl sulfoxide 1.093 -0.015
C4H4N2 1,3-Diazine 1.082 -0.015
H2NCH2COOH Glycine 1.096 -0.015
C3H3NO Oxazole 1.075 -0.014
C3H3N acrylonitrile 1.086 -0.014
C4H4N2 Pyrazine 1.083 -0.014
CH3NHCH3 Dimethylamine 1.098 -0.014
C6H5CH3 toluene 1.100 -0.014
C3H3NO Oxazole 1.073 -0.014
C4H5N (E)-2-Butenenitrile 1.090 -0.014
C6H10 cyclohexene 1.090 -0.014
CH3PH2 Methyl phosphine 1.094 -0.014
CH2CHCHO Acrolein 1.089 -0.013
CH3NC methyl isocyanide 1.094 -0.013
CH3CH(CH3)CH3 Isobutane 1.100 -0.013
C6H12 Cyclohexane 1.101 -0.013
CH3CCH propyne 1.096 -0.013
CH2C(CH3)CH3 1-Propene, 2-methyl- 1.088 -0.013
CH3NO3 Methyl nitrate 1.088 -0.013
CHF2CHF2 1,1,2,2-tetrafluoroethane 1.087 -0.013
C4H6 Methylenecyclopropane 1.088 -0.013
CH3SeCH3 dimethylselenide 1.093 -0.013
CH3NO nitrosomethane 1.094 -0.013
C2H4S Thiirane 1.083 -0.013
CH2CHF Ethene, fluoro- 1.082 -0.013
C4H4O Furan 1.076 -0.013
CH3CCl3 Ethane, 1,1,1-trichloro- 1.093 -0.013
C4H4S Thiophene 1.079 -0.013
C2H4O Ethylene oxide 1.084 -0.013
CH2CCH2 allene 1.087 -0.013
C2H2F2 Ethene, 1,2-difluoro-, (E)- 1.080 -0.013
C6H6 Benzvalene 1.078 -0.012
CHClCCl2 Trichloroethylene 1.080 -0.012
C4H10O Ethoxy ethane 1.100 -0.012
C3H4O Cyclopropanone 1.086 -0.012
C4H6 Cyclobutene 1.083 -0.012
CH3OC2H5 Ethane, methoxy- 1.099 -0.012
C2H5N Aziridine 1.083 -0.012
C5H8 Cyclopentene 1.085 -0.012
CH3CH2CHO Propanal 1.096 -0.012
CH3OCH3 Dimethyl ether 1.099 -0.012
CH3OC2H5 Ethane, methoxy- 1.100 -0.012
C3H6O 2-Propen-1-ol 1.096 -0.012
CH2CO Ketene 1.083 -0.012
CH3SCH3 Dimethyl sulfide 1.091 -0.012
C6H6 Benzvalene 1.082 -0.012
C6H10 cyclohexene 1.100 -0.012
C5H8 Bicyclo[2.1.0]pentane 1.095 -0.012
C6H8 1,4-Cyclohexadiene 1.100 -0.012
C5H6 1-Buten-3-yne, 2-methyl- 1.065 -0.012
H2CS Thioformaldehyde 1.087 -0.012
CH3CHFCH3 2-Fluoropropane 1.092 -0.012
C5H4O2 4-Cyclopentene-1,3-dione 1.093 -0.012
C5H8 Cyclopentene 1.095 -0.012
C4H6S Thiophene, 2,5-dihydro- 1.085 -0.012
CH3CHS Thioacetaldehyde 1.098 -0.011
C6H6 Benzene 1.084 -0.011
C2H4 Ethylene 1.086 -0.011
CH2CHCH2CH3 1-Butene 1.090 -0.011
C2H5Br Ethyl bromide 1.087 -0.011
C6H5F Fluorobenzene 1.083 -0.011
C4H6 Cyclobutene 1.094 -0.011
CH3CHS Thioacetaldehyde 1.089 -0.011
CH3CHFCH3 2-Fluoropropane 1.094 -0.011
CH2CHOH ethenol 1.086 -0.011
CH3SiH3 methyl silane 1.096 -0.011
C4H4N2 Succinonitrile 1.092 -0.011
CH2CHCHO Acrolein 1.084 -0.011
CH2 Methylene 1.085 -0.011
CH3CH2Cl Ethyl chloride 1.086 -0.011
CH3CHFCH3 2-Fluoropropane 1.093 -0.011
CH2CHCH2CH3 1-Butene 1.095 -0.011
C3H4 cyclopropene 1.088 -0.011
C3H7SH 1-Propanethiol 1.090 -0.011
CH3OCHO methyl formate 1.086 -0.011
CH3CHS Thioacetaldehyde 1.090 -0.011
C6H5CN phenyl cyanide 1.082 -0.011
C6H8 Bicyclo[3.1.0]hex-2-ene 1.082 -0.011
C2H3Br vinyl bromide 1.080 -0.011
CH2FCH2CH3 1-Fluoropropane 1.094 -0.011
CH3NO nitrosomethane 1.092 -0.011
CH3CHSHCH3 2-Propanethiol 1.091 -0.011
CH3SCH2CH3 Ethane, (methylthio)- 1.090 -0.010
C4H8 cyclobutane 1.093 -0.010
C4H10O Propane, 2-methoxy- 1.095 -0.010
C6H5F Fluorobenzene 1.081 -0.010
CHOCHCHCH3 2-Butenal 1.084 -0.010
C6H5NH2 aniline 1.084 -0.010
C10H8 Azulene 1.081 -0.010
C2H2ClF 1-chloro-1-fluoroethylene 1.082 -0.010
CH2F2 Methane, difluoro- 1.084 -0.010
C6H5Cl chlorobenzene 1.082 -0.010
C6H5CH3 toluene 1.083 -0.010
C6H6 Fulvene 1.080 -0.010
C10H8 Azulene 1.084 -0.010
C6H5OH phenol 1.082 -0.010
C3H6 Cyclopropane 1.083 -0.010
C2H6O2 1,2-Ethanediol 1.093 -0.010
CH2NOH formaldoxime 1.085 -0.010
C10H8 Azulene 1.080 -0.010
C3H4 cyclopropene 1.072 -0.010
C3H8 Propane 1.096 -0.010
C6H5OH phenol 1.084 -0.010
HCN Hydrogen cyanide 1.064 -0.010
C2H5N Aziridine 1.084 -0.010
C3H7SH 1-Propanethiol 1.094 -0.010
C4H5N Pyrrole 1.076 -0.010
CH3SCH2CH3 Ethane, (methylthio)- 1.089 -0.009
C2H2 Acetylene 1.063 -0.009
C5H8O Cyclopentanone 1.095 -0.009
CH3OC2H5 Ethane, methoxy- 1.092 -0.009
C6H5Cl chlorobenzene 1.081 -0.009
C4H8 cyclobutane 1.091 -0.009
CH3NO2 Methane, nitro- 1.088 -0.009
C6H6 Benzvalene 1.078 -0.009
CH3SeH Methane selenol 1.088 -0.009
CH3I methyl iodide 1.084 -0.009
C6H5CN phenyl cyanide 1.080 -0.009
C4H4N2 1,3-Diazine 1.079 -0.009
C5H10 Cyclopropane, 1,1-dimethyl- 1.095 -0.009
CH3SCH2CH3 Ethane, (methylthio)- 1.092 -0.009
CH3F Methyl fluoride 1.087 -0.009
C6H5CH3 toluene 1.081 -0.009
C3H6O Propylene oxide 1.082 -0.009
CH3CH(CH3)CN Propanenitrile, 2-methyl- 1.092 -0.009
CH3S thiomethoxy 1.090 -0.009
C6H5Cl chlorobenzene 1.079 -0.008
CH2C(CH3)CH3 1-Propene, 2-methyl- 1.095 -0.008
H2CCCCH2 Butatriene 1.083 -0.008
C6H6 Fulvene 1.078 -0.008
C10H16 adamantane 1.093 -0.008
CHOCHCHCH3 2-Butenal 1.090 -0.008
C6H5F Fluorobenzene 1.080 -0.008
C4H5N (E)-2-Butenenitrile 1.090 -0.008
CH2CHOH ethenol 1.079 -0.008
C3H8 Propane 1.094 -0.008
CH2CHCHO Acrolein 1.081 -0.008
C2H2+ acetylene cation 1.077 -0.008
C4H5N (E)-2-Butenenitrile 1.081 -0.008
CH2Br2 dibromomethane 1.079 -0.008
C5H6 1-Buten-3-yne, 2-methyl- 1.090 -0.008
CH3CH2Cl Ethyl chloride 1.089 -0.008
CHClCHCl Ethene, 1,2-dichloro-, (E)- 1.075 -0.008
C2H5F fluoroethane 1.090 -0.008
C3H7SH 1-Propanethiol 1.092 -0.008
C6H5CN phenyl cyanide 1.080 -0.008
C4H4Se selenophene 1.079 -0.008
C6H12 Cyclohexane 1.093 -0.008
HCCCN Cyanoacetylene 1.062 -0.008
C5H6 Cyclopropylacetylene 1.080 -0.008
CH3OC2H5 Ethane, methoxy- 1.086 -0.008
CH2FCH2CH3 1-Fluoropropane 1.093 -0.008
CH3CH(CH3)CN Propanenitrile, 2-methyl- 1.091 -0.007
C3H6O Propylene oxide 1.090 -0.007
CH3Br methyl bromide 1.082 -0.007
CHOCHCHCH3 2-Butenal 1.086 -0.007
C6H5CH3 toluene 1.081 -0.007
C2H3Cl Ethene, chloro- 1.079 -0.007
C6H10O cyclohexanone 1.088 -0.007
C5H6 1-Buten-3-yne, 2-methyl- 1.081 -0.007
CH2NN diazomethane 1.075 -0.007
C4H10O Ethoxy ethane 1.090 -0.007
C2H3 vinyl 1.080 -0.007
HCS+ Thioformyl cation 1.079 -0.007
CHCl3 Chloroform 1.073 -0.007
CHONH2 formamide 1.090 -0.007
CH3COF Acetyl fluoride 1.084 -0.007
CH3CCH propyne 1.060 -0.007
C10H8 Azulene 1.083 -0.007
CH3OCH3 Dimethyl ether 1.085 -0.007
C2H5Br Ethyl bromide 1.093 -0.007
C5H10 2-Pentene, (Z)- 1.092 -0.007
C4H10O Ethoxy ethane 1.092 -0.006
CH3CH(CH3)CH3 Isobutane 1.092 -0.006
CH3CHO Acetaldehyde 1.086 -0.006
CH2NH Methanimine 1.081 -0.006
C2H3 vinyl 1.085 -0.006
C2H5F fluoroethane 1.091 -0.006
C10H8 Azulene 1.081 -0.006
C5H10 Cyclopropane, 1,1-dimethyl- 1.080 -0.006
C6H8 Bicyclo[3.1.0]hex-2-ene 1.078 -0.006
CH3CHClCH3 Propane, 2-chloro- 1.092 -0.006
C2H6 Ethane 1.091 -0.006
CH3OCl methyl hypochlorite 1.086 -0.006
C5H10 2-Pentene, (E)- 1.082 -0.006
C6H8 Bicyclo[3.1.0]hex-2-ene 1.091 -0.005
HCP Phosphaethyne 1.067 -0.005
C2H5CN ethyl cyanide 1.088 -0.005
CH2CHF Ethene, fluoro- 1.077 -0.005
CH3CH2SH ethanethiol 1.091 -0.005
C2H3Br vinyl bromide 1.080 -0.005
C4H10O Propane, 2-methoxy- 1.090 -0.005
CH3NHCH3 Dimethylamine 1.098 -0.005
CH3 Methyl radical 1.079 -0.005
C4H2 Diacetylene 1.058 -0.005
CH3CH2Cl Ethyl chloride 1.090 -0.005
C3H6O 2-Propen-1-ol 1.078 -0.004
C2H5CN ethyl cyanide 1.087 -0.004
SiH2(CH3)2 dimethylsilane 1.089 -0.004
CH3OC2H5 Ethane, methoxy- 1.089 -0.004
C3H8 Propane 1.089 -0.004
CH3CHFCH3 2-Fluoropropane 1.088 -0.004
CH4 Methane 1.087 -0.004
C4H9N Pyrrolidine 1.090 -0.004
C6H5OH phenol 1.076 -0.004
CH3CH2O Ethoxy radical 1.088 -0.003
C6H10 1-Butyne, 3,3-dimethyl- 1.056 -0.003
CH3CH2OH Ethanol 1.088 -0.003
CH3NH2 methyl amine 1.093 -0.002
C8H8 cyclooctatetraene 1.079 -0.002
C6H5CCH phenylacetylene 1.055 -0.002
C3H7N Cyclopropylamine 1.080 -0.002
CH3CF3 Ethane, 1,1,1-trifluoro- 1.081 -0.002
CH3SCH2CH3 Ethane, (methylthio)- 1.087 -0.002
C4H4Se selenophene 1.070 -0.002
C5H6 Cyclopropylacetylene 1.055 -0.002
CH3CH2O Ethoxy radical 1.085 -0.002
C6H5Br bromobenzene 1.072 -0.002
HCCCl Chloroacetylene 1.055 -0.001
HCCF Fluoroacetylene 1.053 -0.001
CH3NHCH3 Dimethylamine 1.084 -0.001
C5H8 1,3-Butadiene, 2-methyl- 1.076 -0.001
CH3CH2O Ethoxy radical 1.086 -0.001
HCCBr bromoacetylene 1.055 -0.001
CH2FCH2CH3 1-Fluoropropane 1.084 -0.001
CH3CHF2 Ethane, 1,1-difluoro- 1.081 -0.000
CH3CH2OH Ethanol 1.086 -0.000
CH2NCH3 N-methylmethanimine 1.089 0.000
CH Methylidyne 1.120 0.000
GeH3CH3 methyl germane 1.083 0.001
CH2CCl2 Ethene, 1,1-dichloro- 1.070 0.002
C5H6S Thiophene, 3-methyl- 1.081 0.002
C4H4N2 Pyridazine 1.064 0.006
CH2I2 Diiodomethane 1.066 0.006
N(CH3)3 Trimethylamine 1.088 0.007
C3H5 Allyl radical 1.069 0.007
CH3CCl(CH3)CH3 Propane, 2-chloro-2-methyl- 1.078 0.008
CH2C(CH3)CH3 1-Propene, 2-methyl- 1.072 0.010
C2H Ethynyl radical 1.047 0.010
HCO Formyl radical 1.080 0.013
C5H10 2-Pentene, (Z)- 1.058 0.021
CH3SOCH3 Dimethyl sulfoxide 1.054 0.023
HCNO fulminic acid 1.027 0.024
C4H10O Methyl propyl ether 1.099 0.330
C3H3NO Isoxazole 1.075 0.366
C4H6 1-Methylcyclopropene 1.070 0.459
C4H6 1-Methylcyclopropene 1.098 0.652
C4H6 1-Methylcyclopropene 1.098 0.663
C4H6 1-Methylcyclopropene 1.087 0.717
C4H6 1-Methylcyclopropene 1.087 2.350
C4H6 1-Methylcyclopropene 1.085 3.108