National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 19April 2018
NIST Standard Reference Database 101
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XXH-bond dimers
XXIOddities

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IV.D.8.

Average Bond Length Differences by Model Chemistry

Calculated at B3PW91/cc-pVTZ

Species Name Bond type Bond Length (Å)
Experimental unc. Calculated Difference atom1 atom2
BeH beryllium monohydride rBeH 1.343   1.159 -0.184 1 2
BeCl beryllium monochloride rBeCl 1.797   1.648 -0.149 1 2
Si2 Silicon diatomic rSiSi 2.246   2.157 -0.089 1 2
C5H10 2-Pentene, (E)- rCC 1.576   1.520 -0.056 11 15
CaC Calcium monocarbide rC#Ca 2.302   2.250 -0.052 1 2
C5H6 Bicyclo[2.1.0]pent-2-ene rCC 1.560   1.510 -0.050 3 5
C6H6 Fulvene rCH 1.130 ±0.030 1.084 -0.046 2 7
C2Cl2 dichloroacetylene rC#C 1.246 ±0.030 1.200 -0.046 1 2
C6H5OCH3 Anisole rCO 1.399   1.358 -0.041 1 7
C5H8 Bicyclo[2.1.0]pentane rCC 1.536   1.495 -0.041 1 5
C4H5N Cyclopropanecarbonitrile rCC 1.472   1.431 -0.041 6 8
C5H8O Methyl cyclopropyl ketone rCH 1.126   1.087 -0.039 3 7
TiCl Titanium Monochloride rClTi 2.265 ±0.000 2.230 -0.034 1 2
C2H3N3 1H-1,2,4-Triazole rCN 1.377   1.343 -0.034 5 7
CH2O2 Dioxirane rOO 1.516 ±0.003 1.482 -0.034 4 5
C5H10 2-Pentene, (Z)- rCC 1.561   1.529 -0.032 1 5
CaH Calcium monohydride rCaH 2.003 ±0.000 1.975 -0.027 1 2
C5H5N Bicyclo[1.1.0]butane-1-carbonitrile rCC 1.514   1.487 -0.027 3 9
ScH Scandium monohydride rScH 1.775 ±0.000 1.750 -0.026 1 2
C4H5NO 3-Methylisoxazole rCC 1.514   1.488 -0.025 1 8
CH2ClCH2Cl Ethane, 1,2-dichloro- rCH 1.112   1.087 -0.025 1 5
C2H2O2 Ethanedial rCH 1.132   1.107 -0.025 1 3
C7H16 heptane rCH 1.121 ±0.007 1.096 -0.025 1 8
C4H5NO Isoxazole, 5-methyl- rCC 1.505   1.481 -0.025 1 5
C9H8 Indene rCC 1.415 ±0.170 1.391 -0.024 1 2
C4H5N Cyclopropanecarbonitrile rCC 1.513   1.490 -0.023 9 10
CH2ClCH2Cl Ethane, 1,2-dichloro- rCC 1.531   1.508 -0.023 1 2
N2O3 Dinitrogen trioxide rN=O 1.217   1.194 -0.023 2 5
C5H9N Pentanenitrile rCC 1.478   1.455 -0.023 4 6
C6H5OCH3 Anisole rCO 1.433   1.410 -0.023 7 8
Si(CH3)4 tetramethylsilane rCH 1.115 ±7.000 1.092 -0.023 2 6
CH3CH2CH2CH3 Butane rCH 1.117   1.095 -0.022 1 5
C6H12 (E)-3-methylpent-2-ene rCC 1.551   1.530 -0.021 9 12
C4H4N2 Succinonitrile rCC 1.561   1.540 -0.021 1 2
C3H8O2 1,3-Propanediol rOH 0.980   0.959 -0.021 6 8
C6H8 (Z)-hexa-1,3,5-triene rC=C 1.368   1.348 -0.020 1 2
CH3OCl methyl hypochlorite rCH 1.111 ±0.018 1.091 -0.020 3 4
C4H4N2 1,3-Diazine rC:N 1.350   1.330 -0.020 3 5
C5H6 1-Buten-3-yne, 2-methyl- rCC 1.445   1.426 -0.019 7 8
C3H8O2 Methane, dimethoxy- rCO 1.432   1.414 -0.018 4 6
C6H8 (Z)-hexa-1,3,5-triene rCH 1.104   1.086 -0.018 1 7
N(CH3)3 Trimethylamine rCH 1.109   1.092 -0.017 2 8
C5H5N Bicyclo[1.1.0]butane-1-carbonitrile rCC 1.518   1.501 -0.017 3 7
C4H6 Bicyclo[1.1.0]butane rCC 1.497   1.480 -0.017 1 2
CH3COCl Acetyl Chloride rCH 1.105   1.088 -0.017 2 5
C3H5ClO Oxirane, (chloromethyl)- rCC 1.475   1.458 -0.017 3 4
C5H6 Bicyclo[2.1.0]pent-2-ene rCC 1.530   1.514 -0.016 1 3
C2H Ethynyl radical rC#C 1.217   1.200 -0.016 1 2
ClO Monochlorine monoxide rClO 1.596 ±0.001 1.580 -0.016 1 2
FO Oxygen monofluoride rFO 1.354   1.339 -0.016 1 2
C5H8 Ethenylcyclopropane rCH 1.099   1.084 -0.015 1 6
CH2CHCHO Acrolein rC=C 1.345 ±0.003 1.330 -0.015 2 3
C3H6O Propylene oxide rCC 1.513   1.498 -0.015 2 6
CH2FCl fluorochloromethane rCF 1.370 ±0.001 1.355 -0.015 1 2
C2H3N3 1H-1,2,4-Triazole rC=N 1.329   1.315 -0.014 1 7
CHF2Cl difluorochloromethane rCF 1.350 ±0.010 1.336 -0.014 1 4
O2+ diatomic oxygen cation rOO 1.116   1.103 -0.014 1 2
F2O Difluorine monoxide rFO 1.405   1.391 -0.014 1 2
CH3COCl Acetyl Chloride rCC 1.506   1.492 -0.014 1 2
CH3NC methyl isocyanide rCN 1.426 ±0.003 1.412 -0.014 1 2
C5H5N Pyridine rC:C 1.400   1.386 -0.014 2 5
CH3NH2 methyl amine rCN 1.471 ±0.003 1.457 -0.014 1 2
C5H8 1,3-Butadiene, 2-methyl- rCC 1.512   1.499 -0.013 2 5
CH3CH2CHO Propanal rCH 1.103   1.090 -0.013 1 6
HO2 Hydroperoxy radical rOO 1.331   1.318 -0.013 1 2
CH2CCHCH3 1,2-Butadiene rC=C 1.314   1.301 -0.013 1 2
CH2CHCHO Acrolein rC=O 1.219 ±0.005 1.206 -0.013 1 4
CFCl3 Trichloromonofluoromethane rCF 1.345   1.332 -0.013 1 2
CH2CHCH2CH2Cl 1-Butene, 4-chloro- rCC 1.508   1.496 -0.012 2 6
CH3OC2H5 Ethane, methoxy- rCO 1.415 ±0.005 1.403 -0.012 1 2
C5H12O Butane, 1-methoxy- rCO 1.415   1.403 -0.012 3 4
C3H4O Cyclopropanone rCC 1.575   1.563 -0.012 3 4
B2H6 Diborane rBH 1.200   1.189 -0.011 1 5
CH3ONO Methyl nitrite rCH 1.102   1.091 -0.011 1 4
C6H6 Fulvene rC=C 1.349 ±0.002 1.337 -0.011 1 2
C4H5N (E)-2-Butenenitrile rCC 1.432   1.421 -0.011 8 10
CH2NN diazomethane rC=N 1.300   1.289 -0.011 1 2
CH3ONO Methyl nitrite rNO 1.398   1.388 -0.010 2 6
NO Nitric oxide rN=O 1.154 ±0.000 1.143 -0.010 1 2
C7H16 heptane rCC 1.534   1.524 -0.010 1 2
N2O3 Dinitrogen trioxide rN=O 1.142   1.132 -0.010 1 3
C4H4N2 Succinonitrile rCC 1.465   1.455 -0.010 1 3
C8H8 cubane rCH 1.097   1.087 -0.010 1 9
CN Cyano radical rC#N 1.172   1.162 -0.010 1 2
C5H8 Cyclobutane, methylene- rCC 1.524   1.515 -0.009 1 3
N3 azide radical rNN 1.181   1.172 -0.009 1 2
NO+ nitric oxide cation rN=O 1.066   1.057 -0.009 1 2
C2H5F fluoroethane rCF 1.398 ±0.007 1.389 -0.009 1 3
NS+ nitrogen sulfide cation rNS 1.440   1.431 -0.009 1 2
CH2CHCl Ethene, chloro- rCH 1.090   1.081 -0.009 1 4
HClO4 perchloric acid rOH 0.980   0.971 -0.009 3 6
O2 Oxygen diatomic rO=O 1.208   1.199 -0.008 1 2
FNO2 Nitryl fluoride rNF 1.467 ±0.015 1.459 -0.008 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.565   1.557 -0.008 3 4
CH2NN diazomethane rN=N 1.139   1.131 -0.008 2 3
C3H7SH 1-Propanethiol rCC 1.529   1.521 -0.008 7 10
C6H6 Fulvene rC=C 1.355 ±0.004 1.347 -0.008 3 5
CH3ONO Methyl nitrite rCO 1.437   1.429 -0.008 1 2
CH3CH2CHO Propanal rCC 1.509   1.501 -0.008 2 3
CH3OCH3 Dimethyl ether rCO 1.411 ±0.001 1.403 -0.008 1 2
As2 Arsenic diatomic rAs#As 2.103   2.095 -0.008 1 2
C6H6 Fulvene rCC 1.476 ±0.008 1.468 -0.008 5 6
N2O3 Dinitrogen trioxide rN=O 1.202   1.194 -0.008 2 4
CH3COCl Acetyl Chloride rC=O 1.187   1.179 -0.008 1 3
CH3CH2CHO Propanal rCH 1.105   1.098 -0.007 2 8
CH2CHCH2CH3 1-Butene rCC 1.536   1.529 -0.007 1 2
HNO3 Nitric acid rNO 1.406   1.399 -0.007 1 2
CH2NH Methanimine rCH 1.103   1.096 -0.007 1 3
NF nitrogen fluoride rNF 1.317   1.310 -0.007 1 2
FNO2 Nitryl fluoride rN=O 1.180 ±0.005 1.173 -0.007 1 3
C3H3NO Oxazole rCO 1.357 ±0.003 1.350 -0.007 1 2
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCH 1.087   1.080 -0.007 11 12
CH3CH2OH Ethanol rCH 1.098   1.091 -0.007 1 6
CH2PH H2CPH rCH 1.090 ±0.015 1.083 -0.007 1 3
C4H6 Cyclobutene rCC 1.517   1.510 -0.007 1 3
BN boron nitride rB=N 1.325   1.318 -0.007 1 2
ClCN chlorocyanogen rC#N 1.161   1.154 -0.007 2 3
NSe Nitrogen monoselenide rN=Se 1.652   1.645 -0.007 1 2
C6H5OH phenol rC:C 1.398   1.391 -0.007 1 2
CH2 Methylene rCH 1.085   1.078 -0.007 1 2
OCSe Carbonyl selenide rC=O 1.159   1.152 -0.007 1 2
CH3CH2CH2CH3 Butane rCC 1.531   1.524 -0.007 1 2
N2 Nitrogen diatomic rN#N 1.098   1.091 -0.006 1 2
CH2O2 Dioxirane rCO 1.388 ±0.004 1.381 -0.006 1 4
C4H10O Ethoxy ethane rCC 1.517   1.511 -0.006 2 4
C2H2O2 Ethanedial rCC 1.526   1.520 -0.006 1 2
CO+ carbon monoxide cation rC=O 1.115 ±0.000 1.109 -0.006 1 2
C3H6O 2-Propen-1-ol rCH 1.091 ±0.010 1.085 -0.006 3 9
CH3CH(CH3)CH3 Isobutane rCH 1.100   1.094 -0.006 3 6
CH3NH2 methyl amine rNH 1.018 ±0.001 1.012 -0.006 2 6
CH3CH2CHO Propanal rCC 1.523   1.517 -0.006 1 2
C3H3NO Oxazole rCO 1.370 ±0.002 1.364 -0.006 1 5
C5H8 Ethenylcyclopropane rCC 1.475   1.469 -0.006 1 2
CP Carbon monophosphide rC#P 1.562   1.556 -0.006 1 2
CH3NO3 Methyl nitrate rCH 1.095   1.089 -0.006 5 8
HOBr Hypobromous acid rBrO 1.834   1.828 -0.006 2 3
CH3ONO Methyl nitrite rN=O 1.182   1.176 -0.006 6 7
HNCNH diiminomethane rC=N 1.224 ±0.001 1.218 -0.006 1 2
NH4+ ammonium cation rHN 1.029 ±0.000 1.023 -0.006 1 2
C2H2 Acetylene rC#C 1.203   1.197 -0.006 1 2
CN- cyanide anion rC#N 1.177 ±0.004 1.171 -0.006 1 2
CH3CH2CHO Propanal rCH 1.096   1.090 -0.006 1 5
C3H6O 2-Propen-1-ol rCH 1.092 ±0.010 1.086 -0.006 2 7
B2H6 Diborane rBH 1.320   1.315 -0.005 1 3
C4H6O Cyclobutanone rCC 1.556   1.551 -0.005 3 5
C4H4N2 1,3-Diazine rCH 1.087   1.082 -0.005 1 7
CH2PH H2CPH rCH 1.090 ±0.015 1.085 -0.005 1 4
C6H12 Cyclohexane rCH 1.101   1.096 -0.005 1 7
C8H8 cyclooctatetraene rCC 1.470 ±0.001 1.465 -0.005 1 5
CaBr Calcium monobromide rCaBr 2.594 ±0.000 2.589 -0.005 1 2
CH3NHCH3 Dimethylamine rCH 1.098   1.093 -0.005 3 7
CH3CH(NH2)COOH Alanine rCC 1.544   1.539 -0.005 3 4
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.097   1.092 -0.005 5 6
CH3OCHO methyl formate rCO 1.437   1.432 -0.005 1 2
C3H4N2 1H-Pyrazole rCH 1.082   1.077 -0.005 1 2
C5H10 Cyclopropane, 1,1-dimethyl- rCC 1.514   1.509 -0.005 1 4
H2CS Thioformaldehyde rC=S 1.611   1.606 -0.004 1 2
C2HF3 Trifluoroethylene rCF 1.316 ±0.011 1.312 -0.004 1 3
C3H4N2 1H-Pyrazole rCH 1.083   1.079 -0.004 5 6
SiC silicon monocarbide rCSi 1.722   1.718 -0.004 1 2
CH2C(CH3)CH3 1-Propene, 2-methyl- rCH 1.088   1.084 -0.004 2 3
CH3CCH propyne rCH 1.096   1.092 -0.004 1 5
PN Phosphorus mononitride rP#N 1.491   1.487 -0.004 1 2
CH3NC methyl isocyanide rCH 1.094   1.090 -0.004 1 4
SiN Silicon nitride rSiN 1.575   1.571 -0.004 1 2
CH3ONO Methyl nitrite rCH 1.090   1.086 -0.004 1 3
CF Fluoromethylidyne rCF 1.276   1.272 -0.004 1 2
C3H4N2 1H-Pyrazole rCH 1.080   1.077 -0.003 3 4
CH2CO Ketene rCH 1.083   1.079 -0.003 1 4
CH2CHCHO Acrolein rCH 1.086 ±0.007 1.083 -0.003 3 7
CH3SeH Methane selenol rSeH 1.473 ±0.020 1.470 -0.003 1 3
CCl2O Phosgene rC=O 1.177   1.173 -0.003 1 2
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCO 1.416   1.413 -0.003 1 5
C6H6 Fulvene rCC 1.470 ±0.004 1.467 -0.003 1 3
C6H5OH phenol rCO 1.364   1.361 -0.003 1 7
SiH2Cl2 dichlorosilane rSiH 1.480 ±0.015 1.477 -0.003 1 2
CH2CO Ketene rC=O 1.162   1.159 -0.003 2 3
C5H8O Methyl cyclopropyl ketone rCC 1.510   1.507 -0.003 2 3
P2 Phosphorus diatomic rP#P 1.893   1.891 -0.003 1 2
CH3CH2CHO Propanal rCH 1.115   1.112 -0.003 3 10
C8H8 cyclooctatetraene rC=C 1.337 ±0.001 1.334 -0.003 1 2
SeO2 Selenium dioxide rSeO 1.607 ±0.001 1.605 -0.002 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.528   1.526 -0.002 1 3
CH3CHS Thioacetaldehyde rCH 1.098   1.096 -0.002 2 6
CH3OCHO methyl formate rCH 1.101   1.099 -0.002 3 8
C5H8 1,3-Butadiene, 2-methyl- rCC 1.463   1.461 -0.002 2 3
CO Carbon monoxide rC#O 1.128 ±0.000 1.126 -0.002 1 2
CH3CHO Acetaldehyde rCH 1.114   1.112 -0.002 1 4
C3H6O 2-Propen-1-ol rCH 1.102 ±0.020 1.100 -0.002 1 6
CH3CHS Thioacetaldehyde rCH 1.090   1.088 -0.002 2 5
ArH+ Argon hydride cation rArH 1.292 ±0.000 1.290 -0.002 1 2
CH2FCl fluorochloromethane rCH 1.090 ±0.010 1.088 -0.002 1 4
BF Boron monofluoride rBF 1.267 ±0.000 1.265 -0.002 1 2
HSe Selenium monohydride rSeH 1.475 ±0.010 1.473 -0.002 1 2
C4H6S Thiophene, 2,5-dihydro- rCH 1.095   1.093 -0.002 2 6
C4H8 cyclobutane rCH 1.093   1.091 -0.002 1 5
C3H8 Propane rCH 1.096   1.094 -0.002 1 4
HS+ sulfur monohydride cation rSH 1.374   1.373 -0.002 1 2
C4H10O Ethoxy ethane rCO 1.411   1.409 -0.002 1 2
AsH Arsenic monohydride rAsH 1.535 ±0.001 1.533 -0.002 1 2
C2H5F fluoroethane rCH 1.095 ±0.007 1.093 -0.002 1 4
BO boron monoxide rB=O 1.205   1.203 -0.001 1 2
C2H2ClF 1-chloro-1-fluoroethylene rCH 1.082 ±0.001 1.081 -0.001 2 5
C4H6 Cyclobutene rCH 1.094   1.093 -0.001 3 7
C5H5N Pyridine rC:C 1.390   1.389 -0.001 3 5
C3H6 Cyclopropane rCC 1.501   1.500 -0.001 1 2
CH3CHClCH3 Propane, 2-chloro- rCH 1.091   1.090 -0.001 2 5
C6H8 1,4-Cyclohexadiene rCH 1.100   1.099 -0.001 1 11
CH3OC2H5 Ethane, methoxy- rCH 1.092 ±0.007 1.091 -0.001 4 11
C6H8 (Z)-hexa-1,3,5-triene rC=C 1.337   1.336 -0.001 3 5
C3H6 Cyclopropane rCH 1.083   1.082 -0.001 1 4
CH2CHCHO Acrolein rCC 1.470 ±0.003 1.469 -0.001 1 2
CBr4 Carbon tetrabromide rCBr 1.942 ±0.002 1.941 -0.001 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.092   1.091 -0.001 1 3
CHClCCl2 Trichloroethylene rCCl 1.712   1.711 -0.001 2 6
HNCO Isocyanic acid rC=O 1.164   1.163 -0.001 3 4
S2+ sulfur dimer cation rS=S 1.825 ±0.010 1.824 -0.001 1 2
As4 Arsenic tetramer rAsAs 2.435   2.434 -0.001 1 2
C4H8 cyclobutane rCH 1.091   1.090 -0.001 1 6
C4H10O Ethoxy ethane rCH 1.092   1.091 -0.001 4 10
C10H8 naphthalene rC:C 1.410   1.410 -0.000 2 3
CH2CHCHO Acrolein rCH 1.086 ±0.007 1.086 -0.000 3 8
CH2O2 Dioxirane rCH 1.090 ±0.002 1.090 -0.000 1 2
CH3OC2H5 Ethane, methoxy- rCH 1.099 ±0.007 1.099 -0.000 1 6
CH3NO3 Methyl nitrate rCH 1.088   1.088 -0.000 5 6
CH3OCH3 Dimethyl ether rCH 1.099 ±0.001 1.099 -0.000 2 6
CSe Carbon monoselenide rC=Se 1.676 ±0.000 1.676 0.000 1 2
C6H12 Cyclohexane rCH 1.093   1.093 0.000 1 13
ClCN chlorocyanogen rCCl 1.629   1.629 0.000 1 2
CH3OCHO methyl formate rCO 1.334   1.334 0.000 2 3
CH3NC methyl isocyanide rC#N 1.166 ±0.003 1.166 0.000 2 3
CH3CH(CH3)CH3 Isobutane rCH 1.092   1.092 0.000 3 9
CSe2 Carbon diselenide rC=Se 1.692 ±0.000 1.692 0.000 1 2
C6H5OH phenol rCH 1.082   1.082 0.000 4 11
C4H6 Cyclobutene rCH 1.083   1.083 0.000 1 5
CH3OCHO methyl formate rCH 1.086   1.086 0.000 1 5
C5H10 2-Pentene, (Z)- rCH 1.092   1.092 0.000 1 2
CH2CHCHO Acrolein rCH 1.084 ±0.005 1.084 0.000 2 6
C2H5N Aziridine rCH 1.084   1.085 0.001 3 6
C4H10O Ethoxy ethane rCH 1.100   1.101 0.001 2 6
C2H5N Aziridine rCH 1.083   1.084 0.001 3 5
C2H5F fluoroethane rCH 1.090 ±0.007 1.091 0.001 2 7
C2H2 Acetylene rCH 1.063   1.064 0.001 1 3
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.090   1.091 0.001 9 11
CH3OC2H5 Ethane, methoxy- rCH 1.100 ±0.003 1.101 0.001 3 8
C3H7SH 1-Propanethiol rCH 1.090   1.091 0.001 8 10
NS Mononitrogen monosulfide rNS 1.497 ±0.000 1.498 0.001 1 2
C4H10O Ethoxy ethane rCH 1.090   1.091 0.001 4 12
BrO Bromine monoxide rOBr 1.718   1.719 0.001 1 2
CF3COOH trifluoroacetic acid rCC 1.546 ±0.005 1.547 0.001 1 2
C6H6 Fulvene rCH 1.080 ±0.005 1.081 0.001 5 11
OCSe Carbonyl selenide rC=Se 1.709   1.710 0.001 1 3
CS carbon monosulfide rC#S 1.535   1.536 0.001 1 2
CF3COOH trifluoroacetic acid rC=O 1.192 ±0.003 1.193 0.001 2 4
C5H8O 2H-Pyran, 3,4-dihydro- rCC 1.516   1.517 0.001 10 13
C2H5F fluoroethane rCH 1.091 ±0.007 1.092 0.001 2 6
C4H10O Propane, 2-methoxy- rCH 1.095   1.096 0.001 1 2
CH3CHClCH3 Propane, 2-chloro- rCH 1.092   1.093 0.001 3 6
C3H6O 2-Propen-1-ol rCH 1.096 ±0.030 1.097 0.001 1 5
C6H5OH phenol rCH 1.084   1.085 0.001 2 9
C2H5F fluoroethane rCC 1.505 ±0.007 1.507 0.002 1 2
C3H7SH 1-Propanethiol rCH 1.092   1.094 0.002 5 7
C4H4N2 1,3-Diazine rC:N 1.328   1.330 0.002 2 6
C3H3NO Oxazole rCH 1.073 ±0.001 1.075 0.002 5 8
CH2CHF Ethene, fluoro- rCH 1.082   1.084 0.002 1 4
C3H4 cyclopropene rCH 1.088   1.090 0.002 1 6
C6H6 Fulvene rCH 1.078 ±0.005 1.080 0.002 3 9
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.089   1.091 0.002 9 10
H2O Water rOH 0.958 ±0.000 0.960 0.002 1 2
BH3 boron trihydride rBH 1.190   1.192 0.002 1 2
C3H3NO Oxazole rCH 1.075 ±0.001 1.077 0.002 4 7
CH2NN diazomethane rCH 1.075   1.077 0.002 1 4
C5H7N Cyclobutanecarbonitrile rCC 1.551   1.553 0.002 3 6
SiP Silicon monophosphide rSiP 2.078 ±0.002 2.079 0.002 1 2
HCCCN Cyanoacetylene rCH 1.062 ±0.001 1.064 0.002 4 5
LiO lithium oxide rLiO 1.688   1.690 0.002 1 2
CH3CH2Cl Ethyl chloride rCH 1.086   1.088 0.002 2 7
CH4 Methane rCH 1.087 ±0.001 1.089 0.002 1 2
CH3CHO Acetaldehyde rCH 1.086   1.088 0.002 2 5
C4H6O Cyclobutanone rCC 1.527   1.529 0.002 2 3
BS boron sulfide rBS 1.609   1.612 0.002 1 2
C3H3NO Oxazole rCH 1.075 ±0.001 1.077 0.002 2 6
DF Hydrofluoric acid-d rDF 0.917 ±0.000 0.920 0.002 1 2
CH3OC2H5 Ethane, methoxy- rCH 1.089 ±0.008 1.091 0.002 4 10
CH2CHCH2CH3 1-Butene rCC 1.493   1.495 0.002 2 3
CH2CHCl Ethene, chloro- rCH 1.079   1.082 0.003 2 5
CH3OC2H5 Ethane, methoxy- rCO 1.407 ±0.004 1.410 0.003 2 3
CH3Br methyl bromide rCH 1.082 ±0.001 1.085 0.003 1 3
C5H10 Cyclopropane, 1,1-dimethyl- rCH 1.080   1.083 0.003 2 6
CH3CCH propyne rCH 1.060   1.063 0.003 3 4
BrF5 bromine pentafluoride rFBr 1.774 ±0.003 1.777 0.003 1 3
D2 Deuterium diatomic rDD 0.742   0.744 0.003 1 2
H2 Hydrogen diatomic rHH 0.741   0.744 0.003 1 2
HD Deuterium hydride rDH 0.741   0.744 0.003 1 2
C4H10O Propane, 2-methoxy- rCO 1.422   1.425 0.003 5 14
DO Hydroxyl-d rDO 0.970   0.973 0.003 1 2
OH Hydroxyl radical rOH 0.970   0.973 0.003 1 2
SO+ sulfur monoxide cation rO=S 1.424   1.427 0.003 1 2
CH3CH2Cl Ethyl chloride rCH 1.090   1.094 0.003 1 3
HF Hydrogen fluoride rHF 0.917 ±0.000 0.920 0.003 1 2
C4H6 Methylenecyclopropane rCC 1.457   1.460 0.003 2 5
HOCl hypochlorous acid rClO 1.691   1.694 0.003 1 3
BrF Bromine monofluoride rFBr 1.759 ±0.000 1.762 0.003 1 2
HO2 Hydroperoxy radical rOH 0.971   0.974 0.003 1 3
CH3CHS Thioacetaldehyde rCH 1.089   1.092 0.003 1 4
SOCl2 thionyl chloride rS=O 1.443 ±0.006 1.447 0.004 1 2
CH3CH2OH Ethanol rCH 1.088   1.092 0.004 1 5
C3H4 cyclopropene rCH 1.072   1.076 0.004 2 4
CH3OC2H5 Ethane, methoxy- rCH 1.086 ±0.010 1.090 0.004 1 5
CH3NO3 Methyl nitrate rNO 1.402   1.406 0.004 1 4
PS phosphorus sulfide rP=S 1.900   1.904 0.004 1 2
C4H4N2 1,3-Diazine rCH 1.082   1.086 0.004 2 8
LiH Lithium Hydride rLiH 1.595 ±0.000 1.599 0.004 1 2
CH2CHCHO Acrolein rCH 1.108 ±0.005 1.112 0.004 1 5
NH Imidogen rNH 1.036   1.040 0.004 1 2
HOBr Hypobromous acid rOH 0.961   0.965 0.004 1 2
C5H10 2-Pentene, (Z)- rCC 1.490   1.494 0.004 8 14
P2H4 H2PPH2 rPH 1.417   1.421 0.004 1 3
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804   1.808 0.004 8 9
CH2CHF Ethene, fluoro- rCH 1.077   1.081 0.004 2 5
OH- hydroxide anion rOH 0.964   0.968 0.004 1 2
CHClCCl2 Trichloroethylene rCCl 1.720   1.724 0.004 2 5
Se2 Selenium diatomic rSe=Se 2.166 ±0.001 2.171 0.005 1 2
CH3OCH3 Dimethyl ether rCH 1.085 ±0.001 1.090 0.005 2 4
C2 Carbon diatomic rC=C 1.243   1.247 0.005 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.087   1.092 0.005 1 2
BCl boron monochloride rBCl 1.719 ±0.000 1.724 0.005 1 2
C3H6O 2-Propen-1-ol rCH 1.078 ±0.010 1.083 0.005 3 8
CH3NHCH3 Dimethylamine rCH 1.098   1.103 0.005 3 5
NO- nitric oxide anion rN=O 1.258 ±0.010 1.263 0.005 1 2
CrH Chromium hydride rHCr 1.655 ±0.001 1.660 0.005 1 2
CH2Br2 dibromomethane rCBr 1.925 ±0.002 1.930 0.005 1 4
BrF3 Bromine trifluoride rFBr 1.810 ±0.000 1.815 0.005 1 3
CH2ClCH2Cl Ethane, 1,2-dichloro- rCCl 1.790   1.795 0.005 1 3
BF3 Borane, trifluoro- rBF 1.307   1.313 0.006 1 2
C5H8 Spiropentane rCC 1.470   1.476 0.006 1 2
CH3CH2O Ethoxy radical rCH 1.085   1.091 0.006 1 5
LiCl lithium chloride rLiCl 2.021 ±0.000 2.027 0.006 1 2
C4H8O2 1,3-Dioxane rCO 1.393   1.399 0.006 1 2
SiH4 Silane rSiH 1.480 ±0.000 1.486 0.006 1 2
CH Methylidyne rCH 1.120   1.126 0.006 1 2
CH3NH2 methyl amine rCH 1.093 ±0.000 1.099 0.006 1 3
CH3CH2O Ethoxy radical rCH 1.086   1.092 0.006 1 4
ClF Chlorine monofluoride rFCl 1.628 ±0.000 1.635 0.007 1 2
CH3OCl methyl hypochlorite rCH 1.086 ±0.018 1.093 0.007 3 5
OPCl Phosphorus oxychloride rP=O 1.462 ±0.010 1.469 0.007 1 2
SiHCl3 Trichlorosilane rSiH 1.464   1.471 0.007 1 2
P2H4 H2PPH2 rPH 1.414   1.421 0.007 1 4
CHBr3 bromoform rCBr 1.924 ±0.005 1.931 0.007 1 3
DCl Hydrochloric acid-d rDCl 1.275 ±0.000 1.282 0.007 1 2
HCl Hydrogen chloride rHCl 1.275 ±0.000 1.282 0.007 1 2
SiH3F monofluorosilane rSiH 1.476   1.483 0.007 1 3
C2H3 vinyl rCH 1.085   1.092 0.007 2 4
SiH3Cl chlorosilane rSiH 1.475   1.482 0.007 1 3
C4H4N2 1,3-Diazine rCH 1.079   1.086 0.007 3 9
CH3NHCH3 Dimethylamine rCH 1.084   1.091 0.007 3 9
CH3Br methyl bromide rCBr 1.934 ±0.000 1.941 0.007 1 2
HBr hydrogen bromide rHBr 1.414 ±0.000 1.422 0.007 1 2
SiO Silicon monoxide rSiO 1.510 ±0.000 1.517 0.007 1 2
C6H5OH phenol rCH 1.076   1.083 0.007 3 10
CFCl3 Trichloromonofluoromethane rCCl 1.764   1.771 0.008 1 3
HS- mercapto anion rSH 1.343   1.351 0.008 1 2
BH Boron monohydride rBH 1.232   1.240 0.008 1 2
PH phosphorus monohydride rPH 1.422   1.430 0.008 1 2
MgH+ magnesium monohydride cation rMgH 1.652   1.660 0.008 1 2
H2Se Hydrogen selenide rSeH 1.460   1.468 0.008 1 2
HS Mercapto radical rSH 1.341   1.349 0.008 1 2
PO Phosphorus monoxide rP=O 1.476   1.484 0.008 1 2
NH2CONH2 Urea rNH 0.998   1.006 0.008 4 8
C8H8 cyclooctatetraene rCH 1.079 ±0.001 1.088 0.009 1 9
DS Mercapto-d rSD 1.341   1.349 0.009 1 2
CCl carbon monochloride rCCl 1.649   1.658 0.009 1 2
C2H3N3 1H-1,2,4-Triazole rCN 1.348   1.357 0.009 1 2
AlN Aluminum nitride rN#Al 1.786   1.795 0.009 1 2
HClO4 perchloric acid rO=Cl 1.414 ±0.001 1.423 0.009 1 2
SF Monosulfur monofluoride rSF 1.599   1.609 0.009 1 2
Br2 Bromine diatomic rBrBr 2.281   2.290 0.009 1 2
C3H7N Cyclopropylamine rCH 1.080   1.090 0.010 1 2
HCl+ hydrogen chloride cation rHCl 1.315   1.324 0.010 1 2
SiS silicon monosulfide rSiS 1.929 ±0.000 1.940 0.010 1 2
AsF Arsenic monofluoride rFAs 1.736 ±0.001 1.746 0.010 1 2
BrCl Bromine monochloride rClBr 2.136 ±0.000 2.147 0.011 1 2
LiF lithium fluoride rLiF 1.564 ±0.000 1.575 0.011 1 2
CCl2O Phosgene rCCl 1.737   1.748 0.011 2 3
PO2 Phosphorus dioxide rP=O 1.467   1.478 0.011 1 2
CCl2 dichloromethylene rCCl 1.711   1.723 0.011 1 2
AlO Aluminum monoxide rAlO 1.618   1.630 0.012 1 2
NaH sodium hydride rNaH 1.887 ±0.000 1.898 0.012 1 2
AsH3 Arsine rAsH 1.511 ±0.000 1.523 0.012 1 2
CH3CH(NH2)COOH Alanine rCC 1.509   1.521 0.012 2 3
Si(CH3)4 tetramethylsilane rSiC 1.875 ±0.002 1.887 0.012 1 2
AlS Aluminum sulfide rAlS 2.029   2.041 0.012 1 2
SSO Disulfur monoxide rS=O 1.456   1.468 0.012 1 2
CH3CH2OH Ethanol rCH 1.086   1.098 0.012 2 8
PF5 Phosphorus pentafluoride rFP 1.577   1.589 0.012 1 5
C3O2 Carbon suboxide rC=O 1.146   1.158 0.012 2 4
S2 Sulfur diatomic rS=S 1.889   1.902 0.012 1 2
NCl nitrogen monochloride rNCl 1.611 ±0.000 1.623 0.012 1 2
C2H6O2S Dimethyl sulfone rCS 1.777 ±0.006 1.789 0.012 1 4
Cl2+ chlorine diatomic cation rClCl 1.892   1.904 0.012 1 2
BrF3 Bromine trifluoride rFBr 1.721   1.734 0.013 1 2
SO Sulfur monoxide rS=O 1.481   1.494 0.013 1 2
GeH germylidene rGeH 1.588   1.601 0.013 1 2
PCl phosphorus chloride rPCl 2.018   2.030 0.013 1 2
SiH3+ Silyl cation rSiH 1.460 ±0.010 1.473 0.013 1 2
C2H3N3 1H-1,2,4-Triazole rC=N 1.305   1.318 0.013 2 4
GeF Germanium monofluoride rFGe 1.745   1.759 0.014 1 2
SCl sulfur monochloride rSCl 1.975   1.989 0.014 1 2
Cl2 Chlorine diatomic rClCl 1.988   2.002 0.014 1 2
PF phosphorus monofluoride rFP 1.593   1.607 0.014 1 2
C5H10 2-Pentene, (E)- rCC 1.484   1.498 0.014 4 11
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804   1.818 0.014 5 8
C3H8O2 Methane, dimethoxy- rCO 1.382   1.397 0.015 1 4
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCO 1.353   1.368 0.015 5 10
SiH Silylidyne rSiH 1.520   1.535 0.015 1 2
GaF Gallium monofluoride rFGa 1.774 ±0.000 1.790 0.015 1 2
CH3COCl Acetyl Chloride rCCl 1.798   1.813 0.015 1 4
PO- phosphorus monoxide anion rOP 1.540   1.555 0.015 1 2
BeF Beryllium monofluoride rBeF 1.361   1.377 0.016 1 2
SSO Disulfur monoxide rS=S 1.884   1.900 0.016 2 3
NaF sodium fluoride rNaF 1.926 ±0.000 1.942 0.016 1 2
GeF+ Germanium monofluoride cation rFGe 1.665 ±0.000 1.682 0.016 1 2
SCl2 Sulfur dichloride rSCl 2.013 ±0.001 2.030 0.017 1 2
SiH3Cl chlorosilane rSiCl 2.051   2.068 0.017 1 2
N(CH3)3 Trimethylamine rCH 1.088   1.106 0.018 2 5
C5H8 Bicyclo[2.1.0]pentane rCC 1.507   1.525 0.018 1 2
SiH3F monofluorosilane rSiF 1.595   1.612 0.018 1 2
C3H5 Allyl radical rCH 1.069   1.087 0.018 1 2
C2H Ethynyl radical rCH 1.047   1.065 0.018 1 3
F2SO Thionyl Fluoride rO=S 1.413 ±0.000 1.431 0.018 1 2
SiH+ silicon monohydride cation rSiH 1.504   1.522 0.018 1 2
CH2FCl fluorochloromethane rCCl 1.762 ±0.000 1.780 0.018 1 3
C4H4N2 Pyridazine rCH 1.064   1.083 0.019 1 5
SiF4 Silicon tetrafluoride rSiF 1.554   1.573 0.019 1 2
AlC Aluminum carbide rC=Al 1.955   1.974 0.019 1 2
SOF4 Sulfur tetrafluoride oxide rFS 1.596 ±0.003 1.615 0.019 1 3
C5H8O Cyclopentanone rCC 1.504   1.524 0.020 2 3
PCl5 Phosphorus pentachloride rPCl 2.124   2.144 0.020 1 5
PF+ phosphorus monofluoride cation rFP 1.500   1.520 0.020 1 2
PF5 Phosphorus pentafluoride rPF 1.534   1.554 0.020 1 2
CH3CH2O Ethoxy radical rCH 1.088   1.108 0.020 2 7
SiF silicon monofluoride rSiF 1.604   1.625 0.020 1 2
SF4 Sulfur tetrafluoride rSF 1.646 ±0.003 1.667 0.021 1 2
AlH aluminum monohydride rAlH 1.648   1.668 0.021 1 2
C3O2 Carbon suboxide rC=C 1.251   1.272 0.021 1 2
SiCl Clorosilylidyne rSiCl 2.061 ±0.000 2.082 0.021 1 2
ClOF3 Chlorine trifluoride oxide rFCl 1.713 ±0.003 1.734 0.021 1 4
HClO4 perchloric acid rOCl 1.641 ±0.002 1.662 0.021 1 3
SiH2Cl2 dichlorosilane rSiCl 2.033 ±0.003 2.054 0.021 1 4
ClFO3 Perchloryl fluoride rCl=O 1.400   1.421 0.021 2 3
GeCl Germanium monochloride rClGe 2.164 ±0.000 2.186 0.022 1 2
C2H6O2S Dimethyl sulfone rS=O 1.431 ±0.004 1.453 0.022 1 2
C2Cl2 dichloroacetylene rCCl 1.612 ±0.030 1.634 0.022 1 3
PCl5 Phosphorus pentachloride rPCl 2.020   2.042 0.022 1 2
F2SO Thionyl Fluoride rFS 1.585 ±0.000 1.608 0.023 1 3
NaCl Sodium Chloride rNaCl 2.361 ±0.000 2.384 0.023 1 2
SF4 Sulfur tetrafluoride rSF 1.545 ±0.003 1.569 0.024 1 4
SiHCl3 Trichlorosilane rSiCl 2.020   2.044 0.024 1 3
SiF2 Silicon difluoride rFSi 1.590 ±0.000 1.614 0.024 1 2
B2 Boron diatomic rBB 1.590   1.614 0.024 1 2
BrF5 bromine pentafluoride rFBr 1.689 ±0.008 1.714 0.025 1 2
AlF Aluminum monofluoride rAlF 1.654 ±0.000 1.680 0.026 1 2
OPCl Phosphorus oxychloride rPCl 2.059 ±0.004 2.085 0.026 1 3
SOF4 Sulfur tetrafluoride oxide rFS 1.539 ±0.003 1.566 0.027 1 5
NaBr Sodium Bromide rNaBr 2.502 ±0.000 2.530 0.028 1 2
HClO4 perchloric acid rO=Cl 1.404 ±0.001 1.433 0.029 1 4
AlCl Aluminum monochloride rAlCl 2.130 ±0.000 2.160 0.030 1 2
CHF2Cl difluorochloromethane rCCl 1.747 ±0.010 1.777 0.030 1 3
C5H10 2-Pentene, (Z)- rCH 1.058   1.088 0.030 12 13
ClOF3 Chlorine trifluoride oxide rFCl 1.603 ±0.004 1.635 0.032 1 3
GaAs Gallium arsenide rGa#As 2.530 ±0.020 2.567 0.037 1 2
NaLi lithium sodium rLiNa 2.889   2.930 0.041 1 2
CFCl chlorofluoromethylene rCCl 1.714   1.755 0.041 1 3
ClFO3 Perchloryl fluoride rFCl 1.598   1.646 0.048 1 2
Li2 Lithium diatomic rLiLi 2.673   2.731 0.058 1 2
He2+ helium dimer cation rHeHe 1.081 ±0.001 1.139 0.059 1 2
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 ±0.040 2.283 0.243 1 3
C5H8 Cyclopentene rCC 1.518   2.351 0.833 2 4
478 molecules.