National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 19April 2018
NIST Standard Reference Database 101
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IV.D.8.

Average Bond Length Differences by Model Chemistry

Calculated at HF/6-311G**

Species Name Bond type Bond Length (Å)
Experimental unc. Calculated Difference atom1 atom2
FNO2 Nitryl fluoride rNF 1.467 ±0.015 1.339 -0.128 1 2
CH2O2 Dioxirane rOO 1.516 ±0.003 1.432 -0.083 4 5
CH3ONO Methyl nitrite rNO 1.398   1.322 -0.076 2 6
HNO3 Nitric acid rNO 1.406   1.333 -0.073 1 2
CH3NO3 Methyl nitrate rNO 1.402   1.330 -0.072 1 4
F2O Difluorine monoxide rFO 1.405   1.334 -0.071 1 2
C2Cl2 dichloroacetylene rC#C 1.246 ±0.030 1.177 -0.069 1 2
O2+ diatomic oxygen cation rOO 1.116   1.061 -0.055 1 2
C6H6 Fulvene rCH 1.130 ±0.030 1.076 -0.054 2 7
C6H5OCH3 Anisole rCO 1.399   1.347 -0.052 1 7
C5H6 Bicyclo[2.1.0]pent-2-ene rCC 1.560   1.508 -0.052 3 5
O2 Oxygen diatomic rO=O 1.208   1.157 -0.051 1 2
C5H10 2-Pentene, (E)- rCC 1.576   1.526 -0.050 11 15
NS+ nitrogen sulfide cation rNS 1.440   1.392 -0.048 1 2
N2O3 Dinitrogen trioxide rN=O 1.217   1.169 -0.048 2 5
HClO4 perchloric acid rOCl 1.641 ±0.002 1.594 -0.047 1 3
C2H3N3 1H-1,2,4-Triazole rCN 1.377   1.330 -0.047 5 7
C5H8O Methyl cyclopropyl ketone rCH 1.126   1.081 -0.045 3 7
SeO2 Selenium dioxide rSeO 1.607 ±0.001 1.563 -0.044 1 2
FO Oxygen monofluoride rFO 1.354   1.311 -0.043 1 2
ScH Scandium monohydride rScH 1.775 ±0.000 1.732 -0.043 1 2
S2+ sulfur dimer cation rS=S 1.825 ±0.010 1.783 -0.042 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.536   1.495 -0.041 1 5
OCSe Carbonyl selenide rC=O 1.159   1.118 -0.040 1 2
BeO beryllium oxide rBe=O 1.331   1.291 -0.040 1 2
C3H8O2 1,3-Propanediol rOH 0.980   0.940 -0.040 6 8
SO+ sulfur monoxide cation rO=S 1.424   1.384 -0.040 1 2
PN Phosphorus mononitride rP#N 1.491   1.451 -0.040 1 2
P2 Phosphorus diatomic rP#P 1.893   1.855 -0.039 1 2
C2H2O2 Ethanedial rCH 1.132   1.094 -0.038 1 3
As2 Arsenic diatomic rAs#As 2.103   2.064 -0.038 1 2
C6H8 (Z)-hexa-1,3,5-triene rC=C 1.368   1.331 -0.037 1 2
NO+ nitric oxide cation rN=O 1.066   1.029 -0.037 1 2
BN boron nitride rB=N 1.325   1.288 -0.037 1 2
LiOH lithium hydroxide rOH 0.969   0.932 -0.037 1 3
NO Nitric oxide rN=O 1.154 ±0.000 1.117 -0.036 1 2
CH2CHCHO Acrolein rC=O 1.219 ±0.005 1.184 -0.035 1 4
C6H5OCH3 Anisole rCO 1.433   1.398 -0.035 7 8
CH2ClCH2Cl Ethane, 1,2-dichloro- rCH 1.112   1.078 -0.034 1 5
N2O3 Dinitrogen trioxide rN=O 1.202   1.168 -0.034 2 4
CHF2Cl difluorochloromethane rCF 1.350 ±0.010 1.316 -0.034 1 4
C2H3N3 1H-1,2,4-Triazole rC=N 1.329   1.295 -0.034 1 7
CH2O2 Dioxirane rCO 1.388 ±0.004 1.355 -0.033 1 4
ClCN chlorocyanogen rC#N 1.161   1.128 -0.033 2 3
C3H8O2 Methane, dimethoxy- rCO 1.432   1.400 -0.032 4 6
CH2NN diazomethane rN=N 1.139   1.107 -0.032 2 3
CH2FCl fluorochloromethane rCF 1.370 ±0.001 1.338 -0.032 1 2
HO2 Hydroperoxy radical rOO 1.331   1.299 -0.032 1 2
C7H16 heptane rCH 1.121 ±0.007 1.090 -0.031 1 8
NSe Nitrogen monoselenide rN=Se 1.652   1.621 -0.031 1 2
C4H4N2 1,3-Diazine rC:N 1.350   1.319 -0.031 3 5
CFCl3 Trichloromonofluoromethane rCF 1.345   1.315 -0.030 1 2
OPCl Phosphorus oxychloride rP=O 1.462 ±0.010 1.432 -0.030 1 2
CH3OCl methyl hypochlorite rCH 1.111 ±0.018 1.082 -0.029 3 4
C9H8 Indene rCC 1.415 ±0.170 1.386 -0.029 1 2
C5H10 2-Pentene, (Z)- rCC 1.561   1.532 -0.029 1 5
C3H3NO Oxazole rCO 1.357 ±0.003 1.329 -0.028 1 2
BrF5 bromine pentafluoride rFBr 1.774 ±0.003 1.746 -0.028 1 3
C5H5N Bicyclo[1.1.0]butane-1-carbonitrile rCC 1.514   1.486 -0.028 3 9
CH3CH2CH2CH3 Butane rCH 1.117   1.089 -0.028 1 5
HClO4 perchloric acid rOH 0.980   0.952 -0.028 3 6
CH3COCl Acetyl Chloride rC=O 1.187   1.159 -0.028 1 3
CH3ONO Methyl nitrite rN=O 1.182   1.154 -0.028 6 7
ClOF3 Chlorine trifluoride oxide rFCl 1.603 ±0.004 1.575 -0.028 1 3
C4H6 Bicyclo[1.1.0]butane rCC 1.497   1.469 -0.028 1 2
N2 Nitrogen diatomic rN#N 1.098   1.070 -0.027 1 2
PO Phosphorus monoxide rP=O 1.476   1.448 -0.027 1 2
N3 azide radical rNN 1.181   1.154 -0.027 1 2
SSO Disulfur monoxide rS=O 1.456   1.429 -0.027 1 2
Si(CH3)4 tetramethylsilane rCH 1.115 ±7.000 1.088 -0.027 2 6
SiO Silicon monoxide rSiO 1.510 ±0.000 1.483 -0.027 1 2
CO+ carbon monoxide cation rC=O 1.115 ±0.000 1.088 -0.027 1 2
C2H5F fluoroethane rCF 1.398 ±0.007 1.371 -0.027 1 3
HOBr Hypobromous acid rBrO 1.834   1.808 -0.026 2 3
CH2CO Ketene rC=O 1.162   1.136 -0.026 2 3
C6H8 (Z)-hexa-1,3,5-triene rCH 1.104   1.078 -0.026 1 7
ClOF3 Chlorine trifluoride oxide rFCl 1.713 ±0.003 1.687 -0.026 1 4
NF nitrogen fluoride rNF 1.317   1.291 -0.026 1 2
SOCl2 thionyl chloride rS=O 1.443 ±0.006 1.417 -0.026 1 2
CCl2O Phosgene rC=O 1.177   1.151 -0.026 1 2
C4H5N Cyclopropanecarbonitrile rCC 1.472   1.447 -0.025 6 8
CH2CHCHO Acrolein rC=C 1.345 ±0.003 1.320 -0.025 2 3
HNCO Isocyanic acid rC=O 1.164   1.139 -0.025 3 4
FNO2 Nitryl fluoride rN=O 1.180 ±0.005 1.155 -0.025 1 3
C5H12O Butane, 1-methoxy- rCO 1.415   1.391 -0.024 3 4
HS+ sulfur monohydride cation rSH 1.374   1.350 -0.024 1 2
N(CH3)3 Trimethylamine rCH 1.109   1.085 -0.024 2 8
CH3OC2H5 Ethane, methoxy- rCO 1.415 ±0.005 1.391 -0.024 1 2
CN- cyanide anion rC#N 1.177 ±0.004 1.153 -0.024 1 2
C3H5ClO Oxirane, (chloromethyl)- rCC 1.475   1.451 -0.024 3 4
HO2 Hydroperoxy radical rOH 0.971   0.947 -0.024 1 3
CH3COCl Acetyl Chloride rCH 1.105   1.081 -0.024 2 5
BO boron monoxide rB=O 1.205   1.181 -0.024 1 2
C6H6 Fulvene rC=C 1.349 ±0.002 1.325 -0.024 1 2
C4H4N2 Succinonitrile rCC 1.561   1.537 -0.024 1 2
CO Carbon monoxide rC#O 1.128 ±0.000 1.105 -0.024 1 2
C2HF3 Trifluoroethylene rCF 1.316 ±0.011 1.293 -0.023 1 3
C6H6 Fulvene rC=C 1.355 ±0.004 1.332 -0.023 3 5
C4H5N Cyclopropanecarbonitrile rCC 1.513   1.490 -0.023 9 10
C5H8 Ethenylcyclopropane rCH 1.099   1.076 -0.023 1 6
C5H5N Bicyclo[1.1.0]butane-1-carbonitrile rCC 1.518   1.496 -0.022 3 7
N2O3 Dinitrogen trioxide rN=O 1.142   1.120 -0.022 1 3
CSe Carbon monoselenide rC=Se 1.676 ±0.000 1.655 -0.021 1 2
DF Hydrofluoric acid-d rDF 0.917 ±0.000 0.896 -0.021 1 2
PO- phosphorus monoxide anion rOP 1.540   1.519 -0.021 1 2
HF Hydrogen fluoride rHF 0.917 ±0.000 0.896 -0.021 1 2
CF3COOH trifluoroacetic acid rC=O 1.192 ±0.003 1.171 -0.021 2 4
SO Sulfur monoxide rS=O 1.481   1.461 -0.020 1 2
CH3ONO Methyl nitrite rCH 1.102   1.082 -0.020 1 4
CH3OCH3 Dimethyl ether rCO 1.411 ±0.001 1.391 -0.020 1 2
C2H2 Acetylene rC#C 1.203   1.182 -0.020 1 2
SiH2Cl2 dichlorosilane rSiH 1.480 ±0.015 1.460 -0.020 1 2
CH3SeH Methane selenol rSeH 1.473 ±0.020 1.454 -0.019 1 3
CH3OCHO methyl formate rCO 1.334   1.315 -0.019 2 3
HNCNH diiminomethane rC=N 1.224 ±0.001 1.205 -0.019 1 2
CH3CH2CHO Propanal rCH 1.103   1.084 -0.019 1 6
CF Fluoromethylidyne rCF 1.276   1.257 -0.019 1 2
CS carbon monosulfide rC#S 1.535   1.516 -0.019 1 2
CH2CHCl Ethene, chloro- rCH 1.090   1.071 -0.019 1 4
AsH Arsenic monohydride rAsH 1.535 ±0.001 1.516 -0.019 1 2
OH Hydroxyl radical rOH 0.970   0.951 -0.018 1 2
CH2CCHCH3 1,2-Butadiene rC=C 1.314   1.296 -0.018 1 2
CH3OCHO methyl formate rCO 1.437   1.419 -0.018 1 2
HOCl hypochlorous acid rClO 1.691   1.673 -0.018 1 3
C4H5NO 3-Methylisoxazole rCC 1.514   1.495 -0.018 1 8
CH3NH2 methyl amine rNH 1.018 ±0.001 1.000 -0.018 2 6
HSe Selenium monohydride rSeH 1.475 ±0.010 1.457 -0.018 1 2
CN Cyano radical rC#N 1.172   1.154 -0.018 1 2
CH3NC methyl isocyanide rC#N 1.166 ±0.003 1.148 -0.018 2 3
Se2 Selenium diatomic rSe=Se 2.166 ±0.001 2.148 -0.018 1 2
C6H12 (E)-3-methylpent-2-ene rCC 1.551   1.533 -0.018 9 12
SSO Disulfur monoxide rS=S 1.884   1.867 -0.017 2 3
HOBr Hypobromous acid rOH 0.961   0.944 -0.017 1 2
CH2ClCH2Cl Ethane, 1,2-dichloro- rCC 1.531   1.514 -0.017 1 2
CH2NH Methanimine rCH 1.103   1.086 -0.017 1 3
C3H3NO Oxazole rCO 1.370 ±0.002 1.352 -0.017 1 5
C5H5N Pyridine rC:C 1.400   1.383 -0.017 2 5
NO- nitric oxide anion rN=O 1.258 ±0.010 1.241 -0.017 1 2
NH4+ ammonium cation rHN 1.029 ±0.000 1.012 -0.017 1 2
H2O Water rOH 0.958 ±0.000 0.941 -0.017 1 2
CH3NH2 methyl amine rCN 1.471 ±0.003 1.454 -0.017 1 2
C4H5NO Isoxazole, 5-methyl- rCC 1.505   1.489 -0.017 1 5
HClO4 perchloric acid rO=Cl 1.414 ±0.001 1.398 -0.016 1 2
F2SO Thionyl Fluoride rFS 1.585 ±0.000 1.569 -0.016 1 3
C8H8 cubane rCH 1.097   1.081 -0.016 1 9
CH3CH2CHO Propanal rCH 1.115   1.099 -0.016 3 10
CH3ONO Methyl nitrite rCO 1.437   1.421 -0.016 1 2
ClFO3 Perchloryl fluoride rFCl 1.598   1.582 -0.016 1 2
SiS silicon monosulfide rSiS 1.929 ±0.000 1.914 -0.016 1 2
CH3NO3 Methyl nitrate rCH 1.095   1.079 -0.016 5 8
ArH+ Argon hydride cation rArH 1.292 ±0.000 1.276 -0.016 1 2
C4H10O Ethoxy ethane rCO 1.411   1.395 -0.016 1 2
CH3CHO Acetaldehyde rCH 1.114   1.099 -0.015 1 4
CH3CH2CHO Propanal rCH 1.105   1.090 -0.015 2 8
H2CS Thioformaldehyde rC=S 1.611   1.596 -0.015 1 2
CH2NN diazomethane rC=N 1.300   1.285 -0.015 1 2
C8H8 cyclooctatetraene rC=C 1.337 ±0.001 1.322 -0.015 1 2
B2H6 Diborane rBH 1.200   1.185 -0.015 1 5
CH3OCHO methyl formate rCH 1.101   1.086 -0.015 3 8
BF Boron monofluoride rBF 1.267 ±0.000 1.252 -0.014 1 2
CH2PH H2CPH rCH 1.090 ±0.015 1.076 -0.014 1 3
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCO 1.416   1.402 -0.014 1 5
PF5 Phosphorus pentafluoride rFP 1.577   1.563 -0.014 1 5
NaF sodium fluoride rNaF 1.926 ±0.000 1.912 -0.014 1 2
C6H8 (Z)-hexa-1,3,5-triene rC=C 1.337   1.323 -0.014 3 5
C4H4N2 1,3-Diazine rCH 1.087   1.073 -0.014 1 7
C3H4O Cyclopropanone rCC 1.575   1.561 -0.014 3 4
CH2FCl fluorochloromethane rCH 1.090 ±0.010 1.076 -0.014 1 4
BrF3 Bromine trifluoride rFBr 1.810 ±0.000 1.796 -0.014 1 3
C3H6O 2-Propen-1-ol rCH 1.092 ±0.010 1.078 -0.014 2 7
BrF3 Bromine trifluoride rFBr 1.721   1.707 -0.014 1 2
C4H10O Propane, 2-methoxy- rCO 1.422   1.408 -0.014 5 14
C6H5OH phenol rCO 1.364   1.350 -0.014 1 7
CF3COOH trifluoroacetic acid rCC 1.546 ±0.005 1.533 -0.013 1 2
C3H6O 2-Propen-1-ol rCH 1.091 ±0.010 1.078 -0.013 3 9
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCH 1.087   1.074 -0.013 11 12
C6H5OH phenol rC:C 1.398   1.385 -0.013 1 2
C2H3N3 1H-1,2,4-Triazole rC=N 1.305   1.292 -0.013 2 4
CH3CH2OH Ethanol rCH 1.098   1.085 -0.013 1 6
NH Imidogen rNH 1.036   1.023 -0.013 1 2
CH2 Methylene rCH 1.085   1.072 -0.013 1 2
SOF4 Sulfur tetrafluoride oxide rFS 1.596 ±0.003 1.583 -0.013 1 3
CH2PH H2CPH rCH 1.090 ±0.015 1.077 -0.013 1 4
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.097   1.084 -0.013 5 6
F2SO Thionyl Fluoride rO=S 1.413 ±0.000 1.400 -0.013 1 2
CH3NC methyl isocyanide rCH 1.094   1.081 -0.013 1 4
CH2O2 Dioxirane rCH 1.090 ±0.002 1.078 -0.013 1 2
BeS beryllium sulfide rBe=S 1.742   1.729 -0.013 1 2
CH3NHCH3 Dimethylamine rCH 1.098   1.086 -0.012 3 7
CH3CCH propyne rCH 1.096   1.084 -0.012 1 5
CH3CH(NH2)COOH Alanine rCC 1.544   1.532 -0.012 3 4
CH3ONO Methyl nitrite rCH 1.090   1.078 -0.012 1 3
CH3CH(CH3)CH3 Isobutane rCH 1.100   1.088 -0.012 3 6
C3H6O 2-Propen-1-ol rCH 1.102 ±0.020 1.090 -0.012 1 6
C3H4N2 1H-Pyrazole rCH 1.082   1.070 -0.012 1 2
CH2CO Ketene rCH 1.083   1.071 -0.012 1 4
OH- hydroxide anion rOH 0.964   0.952 -0.012 1 2
C3H4N2 1H-Pyrazole rCH 1.083   1.071 -0.012 5 6
C4H6S Thiophene, 2,5-dihydro- rCH 1.095   1.084 -0.011 2 6
C6H12 Cyclohexane rCH 1.101   1.090 -0.011 1 7
C2H5F fluoroethane rCH 1.095 ±0.007 1.084 -0.011 1 4
SiHCl3 Trichlorosilane rSiH 1.464   1.453 -0.011 1 2
CH2C(CH3)CH3 1-Propene, 2-methyl- rCH 1.088   1.077 -0.011 2 3
As4 Arsenic tetramer rAsAs 2.435   2.424 -0.011 1 2
S2 Sulfur diatomic rS=S 1.889   1.878 -0.011 1 2
P2H4 H2PPH2 rPH 1.417   1.406 -0.011 1 3
CH3OC2H5 Ethane, methoxy- rCO 1.407 ±0.004 1.396 -0.011 2 3
SF4 Sulfur tetrafluoride rSF 1.545 ±0.003 1.534 -0.011 1 4
CH3CHClCH3 Propane, 2-chloro- rCH 1.091   1.080 -0.011 2 5
C3H4N2 1H-Pyrazole rCH 1.080   1.069 -0.011 3 4
SOF4 Sulfur tetrafluoride oxide rFS 1.539 ±0.003 1.528 -0.011 1 5
CH2CHCHO Acrolein rCH 1.086 ±0.007 1.075 -0.011 3 7
C5H6 Bicyclo[2.1.0]pent-2-ene rCC 1.530   1.519 -0.011 1 3
CH3CH2CHO Propanal rCH 1.096   1.085 -0.011 1 5
CH2CHCHO Acrolein rCH 1.108 ±0.005 1.097 -0.011 1 5
C4H4N2 1,3-Diazine rC:N 1.328   1.318 -0.010 2 6
CSe2 Carbon diselenide rC=Se 1.692 ±0.000 1.682 -0.010 1 2
CH3CHS Thioacetaldehyde rCH 1.098   1.088 -0.010 2 6
HCl+ hydrogen chloride cation rHCl 1.315   1.305 -0.010 1 2
CH3NO3 Methyl nitrate rCH 1.088   1.078 -0.010 5 6
C6H8 1,4-Cyclohexadiene rCH 1.100   1.090 -0.010 1 11
ClF Chlorine monofluoride rFCl 1.628 ±0.000 1.619 -0.010 1 2
C4H8O2 1,3-Dioxane rCO 1.393   1.383 -0.010 1 2
LiOH lithium hydroxide rLiO 1.582   1.572 -0.010 1 2
BF3 Borane, trifluoro- rBF 1.307   1.297 -0.010 1 2
Cl2+ chlorine diatomic cation rClCl 1.892   1.882 -0.009 1 2
C3H6O Propylene oxide rCC 1.513   1.504 -0.009 2 6
MgOH magnesium hydroxide rOH 0.940   0.931 -0.009 1 3
C4H10O Ethoxy ethane rCH 1.100   1.091 -0.009 2 6
CH3OC2H5 Ethane, methoxy- rCH 1.099 ±0.007 1.090 -0.009 1 6
CH3CHS Thioacetaldehyde rCH 1.090   1.081 -0.009 2 5
P2H4 H2PPH2 rPH 1.414   1.405 -0.009 1 4
CH2CHF Ethene, fluoro- rCH 1.082   1.073 -0.009 1 4
CH3OC2H5 Ethane, methoxy- rCH 1.100 ±0.003 1.091 -0.009 3 8
CH3OCH3 Dimethyl ether rCH 1.099 ±0.001 1.090 -0.009 2 6
C2H2ClF 1-chloro-1-fluoroethylene rCH 1.082 ±0.001 1.073 -0.009 2 5
SiH+ silicon monohydride cation rSiH 1.504   1.495 -0.009 1 2
LiO lithium oxide rLiO 1.688   1.680 -0.008 1 2
C5H9N Pentanenitrile rCC 1.478   1.470 -0.008 4 6
CH2CHCHO Acrolein rCH 1.086 ±0.007 1.078 -0.008 3 8
C3H6O 2-Propen-1-ol rCH 1.096 ±0.030 1.088 -0.008 1 5
ClFO3 Perchloryl fluoride rCl=O 1.400   1.392 -0.008 2 3
C3H8 Propane rCH 1.096   1.088 -0.008 1 4
C4H6 Cyclobutene rCH 1.094   1.086 -0.008 3 7
BH Boron monohydride rBH 1.232   1.224 -0.008 1 2
C3H3NO Oxazole rCH 1.073 ±0.001 1.065 -0.008 5 8
CH2CHCHO Acrolein rCH 1.084 ±0.005 1.076 -0.008 2 6
C4H8 cyclobutane rCH 1.093   1.086 -0.008 1 5
C3H3NO Oxazole rCH 1.075 ±0.001 1.067 -0.008 2 6
C4H10O Propane, 2-methoxy- rCH 1.095   1.087 -0.008 1 2
C3H3NO Oxazole rCH 1.075 ±0.001 1.068 -0.008 4 7
C2H2 Acetylene rCH 1.063   1.056 -0.008 1 3
C2H Ethynyl radical rC#C 1.217   1.209 -0.007 1 2
C4H6 Cyclobutene rCH 1.083   1.076 -0.007 1 5
C6H5OH phenol rCH 1.082   1.075 -0.007 4 11
C2H5N Aziridine rCH 1.083   1.076 -0.007 3 5
C3H6 Cyclopropane rCH 1.083   1.076 -0.007 1 4
CH3OCHO methyl formate rCH 1.086   1.079 -0.007 1 5
CH3CH2Cl Ethyl chloride rCH 1.086   1.079 -0.007 2 7
CH3OC2H5 Ethane, methoxy- rCH 1.092 ±0.007 1.085 -0.007 4 11
C3H7SH 1-Propanethiol rCH 1.090   1.083 -0.007 8 10
CH2NN diazomethane rCH 1.075   1.068 -0.007 1 4
BrF Bromine monofluoride rFBr 1.759 ±0.000 1.752 -0.007 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.092   1.085 -0.007 1 3
C5H8 Cyclopentene rCC 1.518   1.511 -0.007 2 4
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.090   1.083 -0.007 9 11
BS boron sulfide rBS 1.609   1.602 -0.007 1 2
CH3CHS Thioacetaldehyde rCH 1.089   1.082 -0.007 1 4
C6H5OH phenol rCH 1.084   1.077 -0.007 2 9
C4H8 cyclobutane rCH 1.091   1.084 -0.007 1 6
C4H4N2 1,3-Diazine rCH 1.082   1.075 -0.007 2 8
C6H6 Fulvene rCH 1.080 ±0.005 1.073 -0.007 5 11
C2H5N Aziridine rCH 1.084   1.078 -0.006 3 6
SiH3Cl chlorosilane rSiH 1.475   1.468 -0.006 1 3
AlS Aluminum sulfide rAlS 2.029   2.023 -0.006 1 2
H2Se Hydrogen selenide rSeH 1.460   1.454 -0.006 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.565   1.559 -0.006 3 4
C6H12 Cyclohexane rCH 1.093   1.087 -0.006 1 13
C2H2O2 Ethanedial rCC 1.526   1.520 -0.006 1 2
D2 Deuterium diatomic rDD 0.742   0.735 -0.006 1 2
H2 Hydrogen diatomic rHH 0.741   0.735 -0.006 1 2
HD Deuterium hydride rDH 0.741   0.735 -0.006 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.089   1.083 -0.006 9 10
HS Mercapto radical rSH 1.341   1.335 -0.006 1 2
SiH3F monofluorosilane rSiH 1.476   1.470 -0.006 1 3
C4H10O Ethoxy ethane rCH 1.092   1.086 -0.006 4 10
SF4 Sulfur tetrafluoride rSF 1.646 ±0.003 1.640 -0.006 1 2
CH3COCl Acetyl Chloride rCC 1.506   1.501 -0.005 1 2
C5H5N Pyridine rC:C 1.390   1.385 -0.005 3 5
C6H6 Fulvene rCH 1.078 ±0.005 1.073 -0.005 3 9
C3H7SH 1-Propanethiol rCH 1.092   1.087 -0.005 5 7
C7H16 heptane rCC 1.534   1.529 -0.005 1 2
CH3CH(CH3)CH3 Isobutane rCH 1.092   1.087 -0.005 3 9
C2H5F fluoroethane rCH 1.090 ±0.007 1.085 -0.005 2 7
C5H10 2-Pentene, (Z)- rCH 1.092   1.087 -0.005 1 2
C4H10O Ethoxy ethane rCH 1.090   1.085 -0.005 4 12
CH3CCH propyne rCH 1.060   1.055 -0.005 3 4
C3H4 cyclopropene rCH 1.088   1.083 -0.005 1 6
CH3Br methyl bromide rCH 1.082 ±0.001 1.077 -0.005 1 3
CH3CHClCH3 Propane, 2-chloro- rCH 1.092   1.087 -0.005 3 6
LiF lithium fluoride rLiF 1.564 ±0.000 1.559 -0.005 1 2
CH2CHCl Ethene, chloro- rCH 1.079   1.074 -0.005 2 5
C5H8 Cyclobutane, methylene- rCC 1.524   1.519 -0.005 1 3
C3H4 cyclopropene rCH 1.072   1.067 -0.005 2 4
C2H5F fluoroethane rCH 1.091 ±0.007 1.086 -0.005 2 6
C5H8 1,3-Butadiene, 2-methyl- rCC 1.512   1.507 -0.005 2 5
DCl Hydrochloric acid-d rDCl 1.275 ±0.000 1.270 -0.004 1 2
HCl Hydrogen chloride rHCl 1.275 ±0.000 1.270 -0.004 1 2
PF5 Phosphorus pentafluoride rPF 1.534   1.530 -0.004 1 2
CH2CHCH2CH3 1-Butene rCC 1.536   1.532 -0.004 1 2
CH3CHO Acetaldehyde rCH 1.086   1.082 -0.004 2 5
CH3OC2H5 Ethane, methoxy- rCH 1.086 ±0.010 1.082 -0.004 1 5
C2H3 vinyl rCH 1.085   1.081 -0.004 2 4
CFCl3 Trichloromonofluoromethane rCCl 1.764   1.760 -0.004 1 3
C2H6O2S Dimethyl sulfone rCS 1.777 ±0.006 1.773 -0.004 1 4
CBr4 Carbon tetrabromide rCBr 1.942 ±0.002 1.938 -0.004 1 2
CH3NHCH3 Dimethylamine rCH 1.098   1.094 -0.004 3 5
CH3CH2Cl Ethyl chloride rCH 1.090   1.087 -0.004 1 3
C5H10 Cyclopropane, 1,1-dimethyl- rCH 1.080   1.077 -0.003 2 6
NH2CONH2 Urea rNH 0.998   0.994 -0.003 4 8
CH2CHCH2CH2Cl 1-Butene, 4-chloro- rCC 1.508   1.505 -0.003 2 6
SF Monosulfur monofluoride rSF 1.599   1.596 -0.003 1 2
HS- mercapto anion rSH 1.343   1.340 -0.003 1 2
SiH Silylidyne rSiH 1.520   1.517 -0.003 1 2
CH3OCH3 Dimethyl ether rCH 1.085 ±0.001 1.082 -0.003 2 4
SiH3+ Silyl cation rSiH 1.460 ±0.010 1.457 -0.003 1 2
CH2CHF Ethene, fluoro- rCH 1.077   1.074 -0.003 2 5
CH4 Methane rCH 1.087 ±0.001 1.084 -0.003 1 2
CH3OC2H5 Ethane, methoxy- rCH 1.089 ±0.008 1.086 -0.003 4 10
C3H7SH 1-Propanethiol rCC 1.529   1.526 -0.003 7 10
SiH4 Silane rSiH 1.480 ±0.000 1.477 -0.003 1 2
AsH3 Arsine rAsH 1.511 ±0.000 1.508 -0.003 1 2
C4H4N2 1,3-Diazine rCH 1.079   1.077 -0.002 3 9
C4H10O Ethoxy ethane rCC 1.517   1.515 -0.002 2 4
CH3CH2CHO Propanal rCC 1.509   1.507 -0.002 2 3
CH3NC methyl isocyanide rCN 1.426 ±0.003 1.424 -0.002 1 2
C3H6O 2-Propen-1-ol rCH 1.078 ±0.010 1.076 -0.002 3 8
CH3CH2CH2CH3 Butane rCC 1.531   1.529 -0.002 1 2
CH3OCl methyl hypochlorite rCH 1.086 ±0.018 1.084 -0.002 3 5
C4H6O Cyclobutanone rCC 1.556   1.554 -0.002 3 5
C3H6 Cyclopropane rCC 1.501   1.499 -0.002 1 2
CH3COCl Acetyl Chloride rCCl 1.798   1.796 -0.002 1 4
CH3CH2OH Ethanol rCH 1.088   1.086 -0.002 1 5
C3H8O2 Methane, dimethoxy- rCO 1.382   1.381 -0.001 1 4
CH3NH2 methyl amine rCH 1.093 ±0.000 1.092 -0.001 1 3
C5H7N Cyclobutanecarbonitrile rCC 1.551   1.550 -0.001 3 6
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.087   1.086 -0.001 1 2
BH3 boron trihydride rBH 1.190   1.189 -0.001 1 2
C2H6O2S Dimethyl sulfone rS=O 1.431 ±0.004 1.430 -0.001 1 2
PF+ phosphorus monofluoride cation rFP 1.500   1.499 -0.001 1 2
He2+ helium dimer cation rHeHe 1.081 ±0.001 1.080 -0.001 1 2
C4H6 Cyclobutene rCC 1.517   1.516 -0.001 1 3
GeH germylidene rGeH 1.588   1.587 -0.001 1 2
C6H5OH phenol rCH 1.076   1.076 -0.000 3 10
C8H8 cyclooctatetraene rCH 1.079 ±0.001 1.079 -0.000 1 9
C4H6O Cyclobutanone rCC 1.527   1.527 -0.000 2 3
CH3CH2O Ethoxy radical rCH 1.085   1.085 0.000 1 5
CH3CH2CHO Propanal rCC 1.523   1.523 0.000 1 2
C5H8O Methyl cyclopropyl ketone rCC 1.510   1.510 0.000 2 3
CCl2 dichloromethylene rCCl 1.711   1.712 0.000 1 2
HI Hydrogen iodide rHI 1.609 ±0.000 1.609 0.000 1 2
BeH beryllium monohydride rBeH 1.343   1.343 0.000 1 2
C5H6 1-Buten-3-yne, 2-methyl- rCC 1.445   1.446 0.001 7 8
AlH aluminum monohydride rAlH 1.648   1.648 0.001 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.528   1.529 0.001 1 3
SiF4 Silicon tetrafluoride rSiF 1.554   1.555 0.001 1 2
CH3CH2O Ethoxy radical rCH 1.086   1.087 0.001 1 4
CH3NHCH3 Dimethylamine rCH 1.084   1.085 0.001 3 9
MgOH magnesium hydroxide rMgO 1.767   1.768 0.001 1 2
GaF Gallium monofluoride rFGa 1.774 ±0.000 1.776 0.001 1 2
C3H7N Cyclopropylamine rCH 1.080   1.081 0.001 1 2
CH3CH2O Ethoxy radical rCH 1.088   1.089 0.001 2 7
C5H10 Cyclopropane, 1,1-dimethyl- rCC 1.514   1.516 0.002 1 4
C2 Carbon diatomic rC=C 1.243   1.244 0.002 1 2
MgH+ magnesium monohydride cation rMgH 1.652   1.654 0.002 1 2
SiH3F monofluorosilane rSiF 1.595   1.597 0.002 1 2
MgO magnesium oxide rMgO 1.749   1.751 0.002 1 2
GeF+ Germanium monofluoride cation rFGe 1.665 ±0.000 1.668 0.002 1 2
B2H6 Diborane rBH 1.320   1.323 0.003 1 3
GeF Germanium monofluoride rFGe 1.745   1.748 0.003 1 2
CCl2O Phosgene rCCl 1.737   1.740 0.003 2 3
BeF Beryllium monofluoride rBeF 1.361   1.364 0.003 1 2
CHBr3 bromoform rCBr 1.924 ±0.005 1.927 0.003 1 3
C4H4N2 Succinonitrile rCC 1.465   1.468 0.003 1 3
CH3CH2OH Ethanol rCH 1.086   1.089 0.003 2 8
CH2Br2 dibromomethane rCBr 1.925 ±0.002 1.928 0.003 1 4
SiF silicon monofluoride rSiF 1.604   1.608 0.004 1 2
HClO4 perchloric acid rO=Cl 1.404 ±0.001 1.408 0.004 1 4
C6H6 Fulvene rCC 1.476 ±0.008 1.480 0.004 5 6
BrF5 bromine pentafluoride rFBr 1.689 ±0.008 1.693 0.004 1 2
SiF2 Silicon difluoride rFSi 1.590 ±0.000 1.594 0.004 1 2
CaOH Calcium monohydroxide rOH 0.930 ±0.007 0.934 0.004 2 3
CHClCCl2 Trichloroethylene rCCl 1.712   1.716 0.004 2 6
C5H8O 2H-Pyran, 3,4-dihydro- rCC 1.516   1.521 0.005 10 13
C5H8 Spiropentane rCC 1.470   1.475 0.005 1 2
C2H5F fluoroethane rCC 1.505 ±0.007 1.510 0.005 1 2
KF Potassium Fluoride rKF 2.171 ±0.000 2.177 0.005 1 2
C4H6 Methylenecyclopropane rCC 1.457   1.462 0.005 2 5
BeH2 beryllium dihydride rBeH 1.326 ±0.000 1.332 0.006 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804   1.810 0.006 8 9
CaO Calcium monoxide rOCa 1.822   1.828 0.006 1 2
CH2ClCH2Cl Ethane, 1,2-dichloro- rCCl 1.790   1.796 0.006 1 3
C10H8 naphthalene rC:C 1.410   1.416 0.006 2 3
MgS magnesium sulfide rMgS 2.143   2.148 0.006 1 2
BCl boron monochloride rBCl 1.719 ±0.000 1.726 0.006 1 2
AsF Arsenic monofluoride rFAs 1.736 ±0.001 1.743 0.007 1 2
C4H5N (E)-2-Butenenitrile rCC 1.432   1.439 0.007 8 10
C6H6 Fulvene rCC 1.470 ±0.004 1.477 0.007 1 3
C5H8 Ethenylcyclopropane rCC 1.475   1.482 0.007 1 2
C2H3N3 1H-1,2,4-Triazole rCN 1.348   1.356 0.008 1 2
C8H8 cyclooctatetraene rCC 1.470 ±0.001 1.478 0.008 1 5
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCO 1.353   1.361 0.008 5 10
C5H8 Bicyclo[2.1.0]pentane rCC 1.507   1.515 0.008 1 2
CHClCCl2 Trichloroethylene rCCl 1.720   1.728 0.008 2 5
N(CH3)3 Trimethylamine rCH 1.088   1.097 0.009 2 5
ClCN chlorocyanogen rCCl 1.629   1.638 0.009 1 2
C3H5 Allyl radical rCH 1.069   1.079 0.010 1 2
CH2CHCHO Acrolein rCC 1.470 ±0.003 1.480 0.010 1 2
BrCl Bromine monochloride rClBr 2.136 ±0.000 2.146 0.010 1 2
PCl5 Phosphorus pentachloride rPCl 2.020   2.030 0.010 1 2
C2H Ethynyl radical rCH 1.047   1.057 0.010 1 3
C4H4N2 Pyridazine rCH 1.064   1.074 0.010 1 5
CH2CHCH2CH3 1-Butene rCC 1.493   1.504 0.011 2 3
CH3Br methyl bromide rCBr 1.934 ±0.000 1.946 0.012 1 2
AlF Aluminum monofluoride rAlF 1.654 ±0.000 1.666 0.012 1 2
CH2FCl fluorochloromethane rCCl 1.762 ±0.000 1.774 0.012 1 3
LiH Lithium Hydride rLiH 1.595 ±0.000 1.607 0.012 1 2
Si(CH3)4 tetramethylsilane rSiC 1.875 ±0.002 1.888 0.013 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804   1.818 0.014 5 8
C5H8 1,3-Butadiene, 2-methyl- rCC 1.463   1.477 0.014 2 3
CHF2Cl difluorochloromethane rCCl 1.747 ±0.010 1.761 0.014 1 3
C5H10 2-Pentene, (Z)- rCC 1.490   1.504 0.014 8 14
Cl2 Chlorine diatomic rClCl 1.988   2.002 0.015 1 2
SiHCl3 Trichlorosilane rSiCl 2.020   2.035 0.015 1 3
LiCl lithium chloride rLiCl 2.021 ±0.000 2.037 0.016 1 2
CH3CH(NH2)COOH Alanine rCC 1.509   1.525 0.016 2 3
CrH Chromium hydride rHCr 1.655 ±0.001 1.671 0.016 1 2
AlC Aluminum carbide rC=Al 1.955   1.972 0.016 1 2
SiH2Cl2 dichlorosilane rSiCl 2.033 ±0.003 2.050 0.017 1 4
OPCl Phosphorus oxychloride rPCl 2.059 ±0.004 2.076 0.018 1 3
C5H8O Cyclopentanone rCC 1.504   1.523 0.019 2 3
SiH3Cl chlorosilane rSiCl 2.051   2.070 0.020 1 2
BeCl beryllium monochloride rBeCl 1.797   1.817 0.020 1 2
SCl2 Sulfur dichloride rSCl 2.013 ±0.001 2.033 0.020 1 2
OCSe Carbonyl selenide rC=Se 1.709   1.729 0.020 1 3
C5H10 2-Pentene, (Z)- rCH 1.058   1.081 0.023 12 13
C5H10 2-Pentene, (E)- rCC 1.484   1.508 0.024 4 11
LiBr Lithium Bromide rLiBr 2.170 ±0.000 2.195 0.024 1 2
CaF Calcium monofluoride rFCa 1.967 ±0.001 1.992 0.025 1 2
AlCl Aluminum monochloride rAlCl 2.130 ±0.000 2.157 0.026 1 2
ClO Monochlorine monoxide rClO 1.596 ±0.001 1.623 0.027 1 2
CFCl chlorofluoromethylene rCCl 1.714   1.742 0.028 1 3
CCl carbon monochloride rCCl 1.649   1.678 0.029 1 2
NaH sodium hydride rNaH 1.887 ±0.000 1.918 0.031 1 2
PCl5 Phosphorus pentachloride rPCl 2.124   2.155 0.031 1 5
CaOH Calcium monohydroxide rOCa 1.976 ±0.004 2.008 0.032 1 2
C2Cl2 dichloroacetylene rCCl 1.612 ±0.030 1.646 0.034 1 3
SCl sulfur monochloride rSCl 1.975   2.014 0.038 1 2
NaCl Sodium Chloride rNaCl 2.361 ±0.000 2.401 0.041 1 2
SiC silicon monocarbide rCSi 1.722   1.763 0.041 1 2
AlN Aluminum nitride rN#Al 1.786   1.828 0.041 1 2
GeCl Germanium monochloride rClGe 2.164 ±0.000 2.206 0.042 1 2
NaBr Sodium Bromide rNaBr 2.502 ±0.000 2.546 0.044 1 2
TiCl Titanium Monochloride rClTi 2.265 ±0.000 2.310 0.045 1 2
B2 Boron diatomic rBB 1.590   1.639 0.049 1 2
CaC Calcium monocarbide rC#Ca 2.302   2.351 0.050 1 2
CaH Calcium monohydride rCaH 2.003 ±0.000 2.054 0.051 1 2
NCl nitrogen monochloride rNCl 1.611 ±0.000 1.665 0.054 1 2
SiP Silicon monophosphide rSiP 2.078 ±0.002 2.133 0.056 1 2
PS phosphorus sulfide rP=S 1.900   1.956 0.056 1 2
NS Mononitrogen monosulfide rNS 1.497 ±0.000 1.553 0.056 1 2
CuH Copper monohydride rCuH 1.463   1.519 0.056 1 2
GaAs Gallium arsenide rGa#As 2.530 ±0.020 2.588 0.058 1 2
BrO Bromine monoxide rOBr 1.718   1.780 0.062 1 2
CuF Copper monofluoride rCuF 1.745 ±0.000 1.809 0.064 1 2
KH Potassium hydride rKH 2.243 ±0.001 2.307 0.064 1 2
AlO Aluminum monoxide rAlO 1.618   1.697 0.079 1 2
CaCl calcium monochloride rClCa 2.437   2.520 0.083 1 2
KCl Potassium Chloride rKCl 2.667 ±0.000 2.754 0.087 1 2
CaBr Calcium monobromide rCaBr 2.594 ±0.000 2.681 0.087 1 2
KBr Potassium Bromide rKBr 2.821 ±0.000 2.912 0.091 1 2
Li2 Lithium diatomic rLiLi 2.673   2.784 0.111 1 2
CuCl Copper monochloride rCuCl 2.051 ±0.000 2.183 0.132 1 2
Cu2 Copper dimer rCuCu 2.220   2.374 0.154 1 2
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 ±0.040 2.278 0.238 1 3
485 molecules.