National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 18October 2016
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-pVDZ

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   1.654 -0.143 1 2
C5H10 2-Pentene, (E)- rCC 1.576   1.523 -0.053 11 15
C5H6 Bicyclo[2.1.0]pent-2-ene rCC 1.560   1.517 -0.043 3 5
C6H5OCH3 Anisole rCO 1.399   1.360 -0.039 1 7
C6H6 Fulvene rCH 1.130 ±0.030 1.093 -0.037 2 7
C2Cl2 dichloroacetylene rC#C 1.246 ±0.030 1.211 -0.035 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.536   1.502 -0.034 1 5
C4H5N Cyclopropanecarbonitrile rCC 1.472   1.439 -0.033 6 8
TiCl Titanium Monochloride rClTi 2.265 ±0.000 2.233 -0.032 1 2
CH2O2 Dioxirane rOO 1.516 ±0.003 1.485 -0.030 4 5
C5H10 2-Pentene, (Z)- rCC 1.561   1.531 -0.030 1 5
C2H3N3 1H-1,2,4-Triazole rCN 1.377   1.350 -0.027 5 7
ScH Scandium monohydride rHSc 1.775 ±0.000 1.749 -0.026 1 2
C4H5NO 3-Methylisoxazole rCC 1.514   1.492 -0.022 1 8
C6H5OCH3 Anisole rCO 1.433   1.411 -0.022 7 8
C4H5NO Isoxazole, 5-methyl- rCC 1.505   1.484 -0.021 1 5
C5H5N Bicyclo[1.1.0]butane-1-carbonitrile rCC 1.514   1.494 -0.020 3 9
NaF sodium fluoride rNaF 1.926 ±0.000 1.906 -0.020 1 2
C4H4N2 Succinonitrile rCC 1.561   1.542 -0.019 1 2
C6H12 (E)-3-methylpent-2-ene rCC 1.551   1.532 -0.019 9 12
N2O3 Dinitrogen trioxide rN=O 1.217   1.198 -0.019 2 5
CaH Calcium monohydride rHCa 2.003 ±0.000 1.984 -0.019 1 2
CH2ClCH2Cl Ethane, 1,2-dichloro- rCC 1.531   1.513 -0.018 1 2
C3H8O2 Methane, dimethoxy- rCO 1.432   1.414 -0.018 4 6
C4H5N Cyclopropanecarbonitrile rCC 1.513   1.496 -0.017 9 10
C5H9N Pentanenitrile rCC 1.478   1.461 -0.017 4 6
C9H8 Indene rCC 1.415 ±0.170 1.399 -0.016 1 2
C7H16 heptane rCH 1.121 ±0.007 1.106 -0.015 1 8
C3H8O2 1,3-Propanediol rOH 0.980   0.966 -0.014 6 8
CH2ClCH2Cl Ethane, 1,2-dichloro- rCH 1.112   1.098 -0.014 1 5
C2H2O2 Ethanedial rCH 1.132   1.118 -0.014 1 3
CH3NH2 methyl amine rCN 1.471 ±0.003 1.458 -0.013 1 2
CH2FCl fluorochloromethane rCF 1.370 ±0.001 1.357 -0.013 1 2
C4H4N2 1,3-Diazine rC:N 1.350   1.337 -0.013 3 5
Si(CH3)4 tetramethylsilane rCH 1.115 ±7.000 1.103 -0.012 2 6
C5H6 1-Buten-3-yne, 2-methyl- rCC 1.445   1.433 -0.012 7 8
C5H12O Butane, 1-methoxy- rCO 1.415   1.403 -0.012 3 4
F2 Fluorine diatomic rFF 1.412   1.400 -0.012 1 2
CH3CH2CH2CH3 Butane rCH 1.117   1.106 -0.011 1 5
C6H8 (Z)-hexa-1,3,5-triene rC=C 1.368   1.357 -0.011 1 2
C5H5N Bicyclo[1.1.0]butane-1-carbonitrile rCC 1.518   1.507 -0.011 3 7
C5H6 Bicyclo[2.1.0]pent-2-ene rCC 1.530   1.519 -0.011 1 3
CHF2Cl difluorochloromethane rCF 1.350 ±0.010 1.339 -0.011 1 4
CH3NC methyl isocyanide rCN 1.426 ±0.003 1.415 -0.011 1 2
CH3ONO Methyl nitrite rNO 1.398   1.387 -0.011 2 6
C3H6O Propylene oxide rCC 1.513   1.502 -0.011 2 6
C4H10O Methyl propyl ether rCO 1.413   1.402 -0.011 1 9
C5H8 Cyclopentene rCC 1.518   1.507 -0.011 2 4
FO Oxygen monofluoride rFO 1.354   1.344 -0.010 1 2
O2+ diatomic oxygen cation rOO 1.116   1.106 -0.010 1 2
C3H5ClO Oxirane, (chloromethyl)- rCC 1.475   1.465 -0.010 3 4
CH3COCl Acetyl Chloride rCC 1.506   1.496 -0.010 1 2
CH3OCl methyl hypochlorite rHC 1.111 ±0.018 1.102 -0.009 3 4
HO2 Hydroperoxy radical rOO 1.331   1.322 -0.009 1 2
CFCl3 Trichloromonofluoromethane rCF 1.345   1.336 -0.009 1 2
C5H8 1,3-Butadiene, 2-methyl- rCC 1.512   1.503 -0.009 2 5
C3H4O Cyclopropanone rCC 1.575   1.566 -0.009 3 4
C6H8 (Z)-hexa-1,3,5-triene rCH 1.104   1.096 -0.008 1 7
CH3OCH3 Dimethyl ether rCO 1.411 ±0.001 1.403 -0.008 1 2
C2H5F fluoroethane rCF 1.398 ±0.007 1.390 -0.008 1 3
C2H3N3 1H-1,2,4-Triazole rC=N 1.329   1.321 -0.008 1 7
CH2CHCH2CH2Cl 1-Butene, 4-chloro- rCC 1.508   1.500 -0.008 2 6
CH2CHCHO Acrolein rC=O 1.219 ±0.005 1.211 -0.008 1 4
HNO3 Nitric acid rNO 1.406   1.398 -0.008 1 2
N(CH3)3 Trimethylamine rCH 1.109   1.101 -0.008 2 8
CH3COCl Acetyl Chloride rCH 1.105   1.098 -0.007 2 5
FNO2 Nitryl fluoride rNF 1.467 ±0.015 1.460 -0.007 1 2
C7H16 heptane rCC 1.534   1.527 -0.007 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.565   1.559 -0.006 3 4
CH2CHCHO Acrolein rC=C 1.345 ±0.003 1.339 -0.006 2 3
C5H5N Pyridine rC:C 1.400   1.394 -0.006 2 5
CH3ONO Methyl nitrite rCO 1.437   1.431 -0.006 1 2
O2 Oxygen diatomic rO=O 1.208   1.202 -0.006 1 2
CH2CHCH2CH3 1-Butene rCC 1.536   1.531 -0.005 1 2
C5H8 Ethenylcyclopropane rCH 1.099   1.094 -0.005 1 6
C4H10O Methyl propyl ether rCC 1.530   1.525 -0.005 5 13
C5H8 Cyclobutane, methylene- rCC 1.524   1.519 -0.005 1 3
NF nitrogen fluoride rNF 1.317   1.312 -0.005 1 2
F2O Difluorine monoxide rFO 1.405   1.400 -0.005 1 2
C2H2O2 Ethanedial rCC 1.526   1.521 -0.005 1 2
C4H5N (E)-2-Butenenitrile rCC 1.432   1.428 -0.004 8 10
C3H7SH 1-Propanethiol rCC 1.529   1.525 -0.004 7 10
C4H6 Bicyclo[1.1.0]butane rCC 1.497   1.493 -0.004 1 2
CH3OCHO methyl formate rCO 1.437   1.433 -0.004 1 2
CH2NN diazomethane rC=N 1.300   1.296 -0.004 1 2
CF3COOH trifluoroacetic acid rCC 1.546 ±0.005 1.542 -0.004 1 2
CH2O2 Dioxirane rCO 1.388 ±0.004 1.384 -0.004 1 4
C4H4N2 Succinonitrile rCC 1.465   1.461 -0.004 1 3
CH3CH2CHO Propanal rCC 1.509   1.505 -0.004 2 3
C4H10O Ethoxy ethane rCC 1.517   1.514 -0.003 2 4
CH2CCHCH3 1,2-Butadiene rC=C 1.314   1.311 -0.003 1 2
CH3CH2CHO Propanal rCC 1.523   1.520 -0.003 1 2
CH3CH2CH2CH3 Butane rCC 1.531   1.528 -0.003 1 2
C6H5OH phenol rCO 1.364   1.361 -0.003 1 7
N2O3 Dinitrogen trioxide rN=O 1.202   1.199 -0.003 2 4
NO Nitric oxide rN=O 1.154 ±0.000 1.151 -0.003 1 2
C6H6 Fulvene rCC 1.476 ±0.008 1.473 -0.003 5 6
CH3CH2CHO Propanal rCH 1.103   1.100 -0.003 1 6
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCO 1.416   1.413 -0.003 1 5
C4H6O Cyclobutanone rCC 1.556   1.553 -0.003 3 5
As2 Arsenic diatomic rAs#As 2.103   2.100 -0.003 1 2
CH3COCl Acetyl Chloride rC=O 1.187   1.185 -0.002 1 3
C4H6 Cyclobutene rCC 1.517   1.515 -0.002 1 3
C6H6 Fulvene rC=C 1.349 ±0.002 1.346 -0.002 1 2
C2H Ethynyl radical rC#C 1.217   1.214 -0.002 1 2
CH3CH(NH2)COOH Alanine rCC 1.544   1.542 -0.002 3 4
C6H8 1,3-Cyclohexadiene rCC 1.466   1.464 -0.002 2 3
N2O3 Dinitrogen trioxide rN=O 1.142   1.140 -0.002 1 3
FNO2 Nitryl fluoride rN=O 1.180 ±0.005 1.179 -0.001 1 3
C4H10O Ethoxy ethane rCO 1.411   1.410 -0.001 1 2
HClO4 perchloric acid rHO 0.980   0.979 -0.001 3 6
CH3ONO Methyl nitrite rCH 1.102   1.101 -0.001 1 4
NO+ nitric oxide cation rN=O 1.066   1.065 -0.001 1 2
C5H10 Cyclopropane, 1,1-dimethyl- rCC 1.514   1.514 -0.000 1 4
C5H8 Ethenylcyclopropane rCC 1.475   1.475 -0.000 1 2
BN boron nitride rB=N 1.325   1.325 0.000 1 2
C8H8 cyclooctatetraene rCC 1.470 ±0.001 1.470 0.000 1 5
C6H6 Fulvene rC=C 1.355 ±0.004 1.356 0.001 3 5
C2HF3 Trifluoroethylene rCF 1.316 ±0.011 1.317 0.001 1 3
CO+ carbon monoxide cation rC=O 1.115 ±0.000 1.116 0.001 1 2
OCSe Carbonyl selenide rC=O 1.159   1.160 0.001 1 2
C8H8 cubane rCH 1.097   1.098 0.001 1 9
CH3ONO Methyl nitrite rN=O 1.182   1.183 0.001 6 7
C6H5OH phenol rC:C 1.398   1.399 0.001 1 2
C6H8 1,3-Cyclohexadiene rCH 1.100   1.101 0.001 5 11
CCl2O Phosgene rC=O 1.177   1.178 0.001 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.528   1.530 0.002 1 3
B2H6 Diborane rBH 1.200   1.202 0.002 1 5
CH2CHCl Ethene, chloro- rCH 1.090   1.092 0.002 1 4
CH3CH2CHO Propanal rCH 1.105   1.107 0.002 2 8
C6H6 Fulvene rCC 1.470 ±0.004 1.472 0.002 1 3
CN Cyano radical rC#N 1.172   1.174 0.002 1 2
C4H10O Methyl propyl ether rCC 1.516   1.518 0.002 10 13
CH2NN diazomethane rN=N 1.139   1.142 0.003 2 3
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCH 1.087   1.090 0.003 11 12
C4H10O Methyl propyl ether rCO 1.408   1.411 0.003 9 10
CH3CH2OH Ethanol rCH 1.098   1.101 0.003 1 6
CH3NH2 methyl amine rNH 1.018 ±0.001 1.021 0.003 2 6
NS+ nitrogen sulfide cation rNS 1.440   1.443 0.003 1 2
BO boron monoxide rB=O 1.205   1.208 0.003 1 2
CH3SeH Methane selenol rHSe 1.473 ±0.020 1.476 0.003 1 3
C4H10O Methyl propyl ether rCH 1.107   1.111 0.004 10 11
C5H8 1,3-Butadiene, 2-methyl- rCC 1.463   1.467 0.004 2 3
CH2NH Methanimine rCH 1.103   1.107 0.004 1 3
C6H8 1,3-Cyclohexadiene rCH 1.090   1.094 0.004 1 7
CH3CH(CH3)CH3 Isobutane rCH 1.100   1.104 0.004 3 6
CH3CH2CHO Propanal rCH 1.096   1.100 0.004 1 5
ClCN chlorocyanogen rC#N 1.161   1.165 0.004 2 3
C4H4N2 1,3-Diazine rCH 1.087   1.091 0.004 1 7
CH2CHCHO Acrolein rCC 1.470 ±0.003 1.474 0.004 1 2
CH3NO3 Methyl nitrate rCH 1.095   1.100 0.005 5 8
C4H10O Propane, 2-methoxy- rCO 1.422   1.427 0.005 5 14
CH2CO Ketene rC=O 1.162   1.167 0.005 2 3
CH2PH H2CPH rCH 1.090 ±0.015 1.095 0.005 1 3
C2H5F fluoroethane rCC 1.505 ±0.007 1.510 0.005 1 2
HNCNH diiminomethane rC=N 1.224 ±0.001 1.229 0.005 1 2
C3H6 Cyclopropane rCC 1.501   1.506 0.005 1 2
C3H4N2 1H-Pyrazole rCH 1.082   1.087 0.005 1 2
HSe Selenium monohydride rHSe 1.475 ±0.010 1.480 0.005 1 2
C5H8O 2H-Pyran, 3,4-dihydro- rCC 1.516   1.521 0.005 10 13
C5H7N Cyclobutanecarbonitrile rCC 1.551   1.556 0.005 3 6
C6H12 Cyclohexane rCH 1.101   1.106 0.005 1 7
CH3OCHO methyl formate rCO 1.334   1.339 0.005 2 3
CH2 Methylene rCH 1.085   1.090 0.005 1 2
CH3CCH propyne rCH 1.096   1.101 0.005 1 5
H2CS Thioformaldehyde rC=S 1.611   1.616 0.005 1 2
AsH Arsenic monohydride rHAs 1.535 ±0.001 1.540 0.005 1 2
CH3NHCH3 Dimethylamine rCH 1.098   1.103 0.005 3 7
C3H4N2 1H-Pyrazole rCH 1.083   1.088 0.005 5 6
CH2C(CH3)CH3 1-Propene, 2-methyl- rCH 1.088   1.093 0.005 2 3
CO Carbon monoxide rC#O 1.128 ±0.000 1.134 0.006 1 2
CH3NC methyl isocyanide rCH 1.094   1.100 0.006 1 4
CH3ONO Methyl nitrite rCH 1.090   1.096 0.006 1 3
N2 Nitrogen diatomic rN#N 1.098   1.104 0.006 1 2
OCSe Carbonyl selenide rC=Se 1.709   1.715 0.006 1 3
HNCO Isocyanic acid rC=O 1.164   1.170 0.006 3 4
C5H5N Pyridine rC:C 1.390   1.396 0.006 3 5
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.097   1.103 0.006 5 6
CSe2 Carbon diselenide rC=Se 1.692 ±0.000 1.698 0.006 1 2
C3H4N2 1H-Pyrazole rCH 1.080   1.086 0.006 3 4
CH2PH H2CPH rCH 1.090 ±0.015 1.096 0.006 1 4
CH2CHCHO Acrolein rCH 1.086 ±0.007 1.092 0.006 3 7
C8H8 cyclooctatetraene rC=C 1.337 ±0.001 1.344 0.006 1 2
CH3CH2SH ethanethiol rCH 1.095   1.101 0.006 1 4
CH2CO Ketene rCH 1.083   1.089 0.007 1 4
SiH2Cl2 dichlorosilane rSiH 1.480 ±0.015 1.487 0.007 1 2
C4H6O Cyclobutanone rCC 1.527   1.534 0.007 2 3
CH2CHCH2CH3 1-Butene rCC 1.493   1.500 0.007 2 3
DF Hydrofluoric acid-d rDF 0.917 ±0.000 0.924 0.007 1 2
C4H10O Methyl propyl ether rCH 1.093   1.100 0.007 5 6
CH3NO3 Methyl nitrate rNO 1.402   1.409 0.007 1 4
CH3CHS Thioacetaldehyde rCH 1.098   1.105 0.007 2 6
CF Fluoromethylidyne rCF 1.276   1.283 0.007 1 2
C6H8 (Z)-hexa-1,3,5-triene rC=C 1.337   1.344 0.007 3 5
CF3COOH trifluoroacetic acid rC=O 1.192 ±0.003 1.199 0.007 2 4
CBr4 Carbon tetrabromide rCBr 1.942 ±0.002 1.949 0.007 1 2
C5H10 2-Pentene, (Z)- rCC 1.490   1.497 0.007 8 14
C2H2 Acetylene rC#C 1.203   1.210 0.008 1 2
CSe Carbon monoselenide rC=Se 1.676 ±0.000 1.684 0.008 1 2
HF Hydrogen fluoride rHF 0.917 ±0.000 0.925 0.008 1 2
CN- cyanide anion rC#N 1.177 ±0.004 1.185 0.008 1 2
CH3CHS Thioacetaldehyde rCH 1.090   1.098 0.008 2 5
CH3CH2CHO Propanal rCH 1.115   1.123 0.008 3 10
CP Carbon monophosphide rC#P 1.562   1.570 0.008 1 2
C3H3NO Oxazole rCO 1.357   1.365 0.008 1 5
CH3OCHO methyl formate rCH 1.101   1.109 0.008 3 8
C4H4N2 1,3-Diazine rC:N 1.328   1.336 0.008 2 6
C6H8 1,4-Cyclohexadiene rCH 1.100   1.108 0.008 1 11
C4H8 cyclobutane rCH 1.093   1.102 0.008 1 5
H2O Water rOH 0.958 ±0.000 0.966 0.009 1 2
CHClCCl2 Trichloroethylene rCCl 1.712   1.721 0.009 2 6
C4H6S Thiophene, 2,5-dihydro- rCH 1.095   1.104 0.009 2 6
CH2FCl fluorochloromethane rCH 1.090 ±0.010 1.099 0.009 1 4
C3H8 Propane rCH 1.096   1.105 0.009 1 4
C4H10O Ethoxy ethane rCH 1.092   1.101 0.009 4 10
HS+ sulfur monohydride cation rHS 1.374   1.383 0.009 1 2
C4H6 Cyclobutene rCH 1.094   1.103 0.009 3 7
As4 Arsenic tetramer rAsAs 2.435   2.444 0.009 1 2
ArH+ Argon hydride cation rHAr 1.292 ±0.000 1.301 0.009 1 2
CH3CHO Acetaldehyde rCH 1.114   1.123 0.009 1 4
C2H5F fluoroethane rCH 1.095 ±0.007 1.104 0.009 1 4
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.092   1.101 0.009 1 3
CH3NO3 Methyl nitrate rCH 1.088   1.097 0.009 5 6
CH3CH2SH ethanethiol rCH 1.092   1.101 0.009 1 5
PN Phosphorus mononitride rP#N 1.491   1.500 0.009 1 2
CHONH2 formamide rNH 1.001   1.010 0.009 3 6
CH2CHCHO Acrolein rCH 1.086 ±0.007 1.095 0.009 3 8
C6H5OH phenol rCH 1.082   1.092 0.010 4 11
CH2O2 Dioxirane rCH 1.090 ±0.002 1.100 0.010 1 2
C3H6 Cyclopropane rCH 1.083   1.093 0.010 1 4
C6H12 Cyclohexane rCH 1.093   1.103 0.010 1 13
C4H10O Methyl propyl ether rCH 1.094   1.104 0.010 13 14
C4H8 cyclobutane rCH 1.091   1.101 0.010 1 6
SiC silicon monocarbide rC-Si 1.722   1.732 0.010 1 2
C2H2 Acetylene rCH 1.063   1.073 0.010 1 3
HO2 Hydroperoxy radical rOH 0.971   0.981 0.010 1 3
CH3OCHO methyl formate rCH 1.086   1.096 0.010 1 5
CH3Br methyl bromide rCBr 1.934 ±0.000 1.944 0.010 1 2
CH3CH(CH3)CH3 Isobutane rCH 1.092   1.102 0.010 3 9
C4H10O Methyl propyl ether rCH 1.091   1.101 0.010 5 8
C4H10O Methyl propyl ether rCH 1.099   1.109 0.010 1 2
CH2CHCHO Acrolein rCH 1.084 ±0.005 1.094 0.010 2 6
C6H6 Fulvene rCH 1.080 ±0.005 1.090 0.010 5 11
ClCN chlorocyanogen rCCl 1.629   1.639 0.010 1 2
CH3OCH3 Dimethyl ether rCH 1.099 ±0.001 1.110 0.011 2 6
C4H6 Cyclobutene rCH 1.083   1.094 0.011 1 5
C5H10 2-Pentene, (Z)- rCH 1.092   1.103 0.011 1 2
C4H6 Methylenecyclopropane rCC 1.457   1.468 0.011 2 5
B2H6 Diborane rBH 1.320   1.331 0.011 1 3
C2H5F fluoroethane rCH 1.090 ±0.007 1.101 0.011 2 7
P2 Phosphorus diatomic rP#P 1.893   1.904 0.011 1 2
C6H5OH phenol rCH 1.084   1.095 0.011 2 9
C2H5F fluoroethane rCH 1.091 ±0.007 1.102 0.011 2 6
C4H10O Ethoxy ethane rCH 1.090   1.101 0.011 4 12
CH3CH2SH ethanethiol rCH 1.090   1.101 0.011 2 7
C6H6 Fulvene rCH 1.078 ±0.005 1.089 0.011 3 9
C4H10O Ethoxy ethane rCH 1.100   1.111 0.011 2 6
CH2Br2 dibromomethane rCBr 1.925 ±0.002 1.936 0.011 1 4
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.090   1.101 0.011 9 11
C2H5N Aziridine rCH 1.083   1.094 0.011 3 5
CH2ClCH2Cl Ethane, 1,2-dichloro- rCCl 1.790   1.801 0.011 1 3
C2H5N Aziridine rCH 1.084   1.095 0.011 3 6
DO Hydroxyl-d rDO 0.970   0.981 0.011 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804   1.815 0.011 8 9
OH Hydroxyl radical rOH 0.970   0.981 0.012 1 2
HCCCN Cyanoacetylene rCH 1.062 ±0.001 1.074 0.012 4 5
C3H7SH 1-Propanethiol rCH 1.090   1.102 0.012 8 10
C4H10O Propane, 2-methoxy- rCH 1.095   1.107 0.012 1 2
C3H7SH 1-Propanethiol rCH 1.092   1.104 0.012 5 7
CH2NN diazomethane rHC 1.075   1.087 0.012 1 4
CH4 Methane rCH 1.087 ±0.001 1.099 0.012 1 2
CH2CHF Ethene, fluoro- rCH 1.082   1.094 0.012 1 4
SiN Silicon nitride rSiN 1.575   1.587 0.012 1 2
HOBr Hypobromous acid rOH 0.961   0.973 0.012 1 2
CH3CHO Acetaldehyde rCH 1.086   1.098 0.012 2 5
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.089   1.101 0.012 9 10
CH3CCH propyne rCH 1.060   1.072 0.012 3 4
CHONH2 formamide rNH 1.001   1.013 0.012 3 5
CH2CHCl Ethene, chloro- rCH 1.079   1.092 0.013 2 5
CH3NC methyl isocyanide rC#N 1.166 ±0.003 1.179 0.013 2 3
CH3CH2Cl Ethyl chloride rCH 1.090   1.103 0.013 1 3
CH3CH2Cl Ethyl chloride rCH 1.086   1.099 0.013 2 7
CHClCCl2 Trichloroethylene rCCl 1.720   1.733 0.013 2 5
C5H8 Spiropentane rCC 1.470   1.483 0.013 1 2
CH3CH2OH Ethanol rCH 1.088   1.101 0.013 1 5
C3H4 cyclopropene rCH 1.088   1.101 0.013 1 6
C5H10 Cyclopropane, 1,1-dimethyl- rCH 1.080   1.093 0.013 2 6
CH3Br methyl bromide rCH 1.082 ±0.001 1.096 0.013 1 3
C4H4N2 1,3-Diazine rCH 1.082   1.096 0.014 2 8
Se2 Selenium diatomic rSe=Se 2.166 ±0.001 2.180 0.014 1 2
CH3CH(NH2)COOH Alanine rCC 1.509   1.523 0.014 2 3
NaH sodium hydride rNaH 1.887 ±0.000 1.900 0.014 1 2
HBr hydrogen bromide rHBr 1.414 ±0.000 1.428 0.014 1 2
C3H4 cyclopropene rCH 1.072   1.086 0.014 2 4
C2H3N3 1H-1,2,4-Triazole rCN 1.348   1.362 0.014 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.087   1.101 0.014 1 2
CH3OCH3 Dimethyl ether rCH 1.085 ±0.001 1.099 0.014 2 4
CH2CHF Ethene, fluoro- rCH 1.077   1.091 0.014 2 5
CH2CHCHO Acrolein rCH 1.108 ±0.005 1.122 0.014 1 5
CHBr3 bromoform rCBr 1.924 ±0.005 1.939 0.015 1 3
CS carbon monosulfide rC#S 1.535   1.550 0.015 1 2
LiF lithium fluoride rLiF 1.564 ±0.000 1.579 0.015 1 2
CH3CHS Thioacetaldehyde rCH 1.089   1.104 0.015 1 4
H2Se Hydrogen selenide rHSe 1.460   1.475 0.015 1 2
BF3 Borane, trifluoro- rBF 1.307   1.322 0.015 1 2
SiP Silicon monophosphide rSiP 2.078 ±0.002 2.093 0.016 1 2
S2+ sulfur dimer cation rS=S 1.825 ±0.010 1.841 0.016 1 2
MgH+ magnesium monohydride cation rHMg 1.652   1.668 0.016 1 2
BS boron sulfide rBS 1.609   1.625 0.016 1 2
BH3 boron trihydride rBH 1.190   1.206 0.016 1 2
CH3NHCH3 Dimethylamine rCH 1.098   1.114 0.016 3 5
CFCl3 Trichloromonofluoromethane rCCl 1.764   1.780 0.016 1 3
NH Imidogen rNH 1.036   1.053 0.016 1 2
C3H8O2 Methane, dimethoxy- rCO 1.382   1.398 0.016 1 4
NS Mononitrogen monosulfide rNS 1.497 ±0.000 1.514 0.016 1 2
C6H5OH phenol rCH 1.076   1.093 0.017 3 10
P2H4 H2PPH2 rPH 1.417   1.434 0.017 1 3
SiH4 Silane rSiH 1.480 ±0.000 1.497 0.017 1 2
C4H4N2 1,3-Diazine rCH 1.079   1.096 0.017 3 9
SiHCl3 Trichlorosilane rSiH 1.464   1.481 0.017 1 2
SiH3F monofluorosilane rSiH 1.476   1.493 0.017 1 3
CH3NHCH3 Dimethylamine rCH 1.084   1.101 0.017 3 9
C2H3 vinyl rCH 1.085   1.102 0.017 2 4
CH3OCl methyl hypochlorite rHC 1.086 ±0.018 1.103 0.017 3 5
NH2CONH2 Urea rNH 0.998   1.015 0.017 4 8
SiH3Cl chlorosilane rSiH 1.475   1.492 0.017 1 3
BF Boron monofluoride rBF 1.267 ±0.000 1.284 0.018 1 2
SeO2 Selenium dioxide rSeO 1.607 ±0.001 1.625 0.018 1 2
C8H8 cyclooctatetraene rCH 1.079 ±0.001 1.097 0.018 1 9
C2 Carbon diatomic rC=C 1.243   1.261 0.018 1 2
CH3NH2 methyl amine rCH 1.093 ±0.000 1.111 0.018 1 3
DCl Hydrochloric acid-d rDCl 1.275 ±0.000 1.293 0.018 1 2
HCl Hydrogen chloride rHCl 1.275 ±0.000 1.293 0.018 1 2
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCO 1.353   1.371 0.018 5 10
LiH Lithium Hydride rLiH 1.595 ±0.000 1.613 0.018 1 2
C5H10 2-Pentene, (E)- rCC 1.484   1.502 0.018 4 11
AsH3 Arsine rHAs 1.511 ±0.000 1.530 0.019 1 2
P2H4 H2PPH2 rPH 1.414   1.433 0.019 1 4
D2 Deuterium diatomic rDD 0.742   0.761 0.019 1 2
H2 Hydrogen diatomic rHH 0.741   0.761 0.019 1 2
HD Deuterium hydride rDH 0.741   0.761 0.019 1 2
Si(CH3)4 tetramethylsilane rSiC 1.875 ±0.002 1.895 0.020 1 2
C3O2 Carbon suboxide rC=O 1.146   1.166 0.020 2 4
CCl2O Phosgene rCCl 1.737   1.756 0.020 2 3
HS Mercapto radical rSH 1.341   1.361 0.020 1 2
C2H3N3 1H-1,2,4-Triazole rC=N 1.305   1.325 0.020 2 4
DS Mercapto-d rSD 1.341   1.361 0.020 1 2
GeH germylidene rHGe 1.588   1.609 0.021 1 2
ClO Monochlorine monoxide rClO 1.596 ±0.001 1.617 0.021 1 2
C3H7N Cyclopropylamine rCH 1.080   1.101 0.021 1 2
PS phosphorus sulfide rP=S 1.900   1.921 0.021 1 2
CH Methylidyne rCH 1.120   1.141 0.021 1 2
PH phosphorus monohydride rPH 1.422   1.444 0.022 1 2
BCl boron monochloride rBCl 1.719 ±0.000 1.742 0.022 1 2
NaCl Sodium Chloride rNaCl 2.361 ±0.000 2.383 0.022 1 2
LiO lithium oxide rLiO 1.688   1.711 0.023 1 2
C4H10O Methyl propyl ether rCH 1.086   1.109 0.023 1 4
OH- hydroxide anion rOH 0.964   0.987 0.023 1 2
HOBr Hypobromous acid rBrO 1.834   1.858 0.024 2 3
CH3CH2OH Ethanol rCH 1.086   1.110 0.024 2 8
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804   1.828 0.024 5 8
GaF Gallium monofluoride rFGa 1.774 ±0.000 1.799 0.025 1 2
SO+ sulfur monoxide cation rO=S 1.424   1.449 0.025 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.507   1.532 0.025 1 2
SiS silicon monosulfide rSiS 1.929 ±0.000 1.955 0.026 1 2
BrF3 Bromine trifluoride rFBr 1.810 ±0.000 1.836 0.026 1 3
C2H6O2S Dimethyl sulfone rCS 1.777 ±0.006 1.803 0.026 1 4
CH3COCl Acetyl Chloride rCCl 1.798   1.824 0.026 1 4
BH Boron monohydride rBH 1.232   1.259 0.027 1 2
CH2FCl fluorochloromethane rCCl 1.762 ±0.000 1.789 0.027 1 3
SOCl2 thionyl chloride rS=O 1.443 ±0.006 1.470 0.027 1 2
BrF5 bromine pentafluoride rFBr 1.774 ±0.003 1.801 0.027 1 3
C2H Ethynyl radical rCH 1.047   1.074 0.028 1 3
SiH Silylidyne rSiH 1.520   1.548 0.028 1 2
C3H5 Allyl radical rCH 1.069   1.097 0.028 1 2
N(CH3)3 Trimethylamine rCH 1.088   1.116 0.028 2 5
C4H4N2 Pyridazine rCH 1.064   1.092 0.028 1 5
CCl2 dichloromethylene rCCl 1.711   1.740 0.029 1 2
SiH+ silicon monohydride cation rHSi 1.504   1.533 0.029 1 2
Br2 Bromine diatomic rBrBr 2.281   2.311 0.029 1 2
AlS Aluminum sulfide rAlS 2.029   2.059 0.030 1 2
CCl carbon monochloride rCCl 1.649   1.679 0.030 1 2
SiO Silicon monoxide rSiO 1.510 ±0.000 1.540 0.030 1 2
HOCl hypochlorous acid rClO 1.691   1.721 0.030 1 3
C3O2 Carbon suboxide rC=C 1.251   1.281 0.030 1 2
S2 Sulfur diatomic rS=S 1.889   1.921 0.031 1 2
C2Cl2 dichloroacetylene rCCl 1.612 ±0.030 1.644 0.032 1 3
AlH aluminum monohydride rAlH 1.648   1.680 0.032 1 2
GeF Germanium monofluoride rF-Ge 1.745   1.778 0.033 1 2
Si2 Silicon diatomic rSiSi 2.246   2.279 0.033 1 2
AlN Aluminum nitride rN#Al 1.786   1.820 0.034 1 2
AsF Arsenic monofluoride rFAs 1.736 ±0.001 1.770 0.034 1 2
PO Phosphorus monoxide rP=O 1.476   1.510 0.034 1 2
BrF Bromine monofluoride rFBr 1.759 ±0.000 1.793 0.034 1 2
BrCl Bromine monochloride rClBr 2.136 ±0.000 2.171 0.035 1 2
Cl2+ chlorine diatomic cation rClCl 1.892   1.927 0.035 1 2
PCl phosphorus chloride rPCl 2.018   2.054 0.036 1 2
PCl5 Phosphorus pentachloride rPCl 2.124   2.161 0.037 1 5
AlC Aluminum carbide rC=Al 1.955   1.992 0.037 1 2
CHF2Cl difluorochloromethane rCCl 1.747 ±0.010 1.784 0.037 1 3
SCl sulfur monochloride rSCl 1.975   2.013 0.038 1 2
B2 Boron diatomic rBB 1.590   1.629 0.039 1 2
BrO Bromine monoxide rOBr 1.718   1.757 0.039 1 2
ClF Chlorine monofluoride rFCl 1.628 ±0.000 1.667 0.039 1 2
GeCl Germanium monochloride rCl-Ge 2.164 ±0.000 2.203 0.039 1 2
Cl2 Chlorine diatomic rClCl 1.988   2.028 0.040 1 2
PO2 Phosphorus dioxide rP=O 1.467   1.506 0.040 1 2
AlO Aluminum monoxide rAlO 1.618   1.658 0.040 1 2
C5H10 2-Pentene, (Z)- rCH 1.058   1.098 0.040 12 13
SiH3Cl chlorosilane rSiCl 2.051   2.091 0.040 1 2
SSO Disulfur monoxide rS=O 1.456   1.496 0.040 1 2
SSO Disulfur monoxide rS=S 1.884   1.924 0.040 2 3
SO Sulfur monoxide rS=O 1.481   1.522 0.041 1 2
ClOF3 Chlorine trifluoride oxide rFCl 1.713 ±0.003 1.754 0.041 1 4
PF5 Phosphorus pentafluoride rFP 1.577   1.618 0.041 1 5
F2SO Thionyl Fluoride rO=S 1.413 ±0.000 1.454 0.042 1 2
SF Monosulfur monofluoride rSF 1.599   1.641 0.042 1 2
SF4 Sulfur tetrafluoride rSF 1.646 ±0.003 1.688 0.042 1 2
BeF Beryllium monofluoride rBeF 1.361   1.403 0.042 1 2
NaLi lithium sodium rLiNa 2.889   2.931 0.042 1 2
SiH2Cl2 dichlorosilane rSiCl 2.033 ±0.003 2.076 0.043 1 4
SiHCl3 Trichlorosilane rSiCl 2.020   2.063 0.043 1 3
HClO4 perchloric acid rO=Cl 1.414 ±0.001 1.458 0.044 1 2
GeF+ Germanium monofluoride cation rFGe 1.665 ±0.000 1.711 0.045 1 2
GaAs Gallium arsenide rGa#As 2.530 ±0.020 2.576 0.046 1 2
PCl5 Phosphorus pentachloride rPCl 2.020   2.067 0.047 1 2
SiCl Clorosilylidyne rSiCl 2.061 ±0.000 2.108 0.047 1 2
SOF4 Sulfur tetrafluoride oxide rF-S 1.596 ±0.003 1.643 0.047 1 3
LiCl lithium chloride rLiCl 2.021 ±0.000 2.069 0.048 1 2
C2H6O2S Dimethyl sulfone rS=O 1.431 ±0.004 1.481 0.050 1 2
PF phosphorus monofluoride rFP 1.593   1.644 0.052 1 2
PO- phosphorus monoxide anion rOP 1.540   1.592 0.052 1 2
BrF3 Bromine trifluoride rFBr 1.721   1.774 0.053 1 2
AlF Aluminum monofluoride rAlF 1.654 ±0.000 1.709 0.054 1 2
PF5 Phosphorus pentafluoride rPF 1.534   1.590 0.056 1 2
ClFO3 Perchloryl fluoride rCl=O 1.400   1.456 0.056 2 3
SiH3F monofluorosilane rSiF 1.595   1.651 0.057 1 2
SiF4 Silicon tetrafluoride rSiF 1.554   1.611 0.057 1 2
AlCl Aluminum monochloride rAlCl 2.130 ±0.000 2.190 0.060 1 2
SiF silicon monofluoride rSiF 1.604   1.665 0.061 1 2
SF4 Sulfur tetrafluoride rSF 1.545 ±0.003 1.607 0.062 1 4
F2SO Thionyl Fluoride rFS 1.585 ±0.000 1.648 0.063 1 3
PF+ phosphorus monofluoride cation rFP 1.500   1.563 0.063 1 2
HClO4 perchloric acid rO=Cl 1.404 ±0.001 1.468 0.064 1 4
SiF2 Silicon difluoride rFSi 1.590 ±0.000 1.654 0.064 1 2
HClO4 perchloric acid rOCl 1.641 ±0.002 1.708 0.067 1 3
SOF4 Sulfur tetrafluoride oxide rF-S 1.539 ±0.003 1.607 0.068 1 5
BrF5 bromine pentafluoride rFBr 1.689 ±0.008 1.757 0.068 1 2
Li2 Lithium diatomic rLiLi 2.673   2.753 0.080 1 2
ClOF3 Chlorine trifluoride oxide rFCl 1.603 ±0.004 1.687 0.084 1 3
ClFO3 Perchloryl fluoride rFCl 1.598   1.695 0.097 1 2
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 ±0.040 2.310 0.270 1 3
C3H3NO Oxazole rCH 1.075   1.387 0.312 3 4
CH3OC2H5 Ethane, methoxy- rCH 1.087   1.402 0.315 1 2
455 molecules.