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 LSDA/6-31G(2df,p)

Species Name Bond type Bond Length (Å)
Experimental unc. Calculated Difference atom1 atom2
Na2 Sodium diatomic rNaNa 3.079   2.899 -0.180 1 2
CuCl Copper monochloride rCuCl 2.051 ±0.000 1.902 -0.149 1 2
CuO Copper Monoxide rCuO 1.724 ±0.000 1.593 -0.132 1 2
CuF Copper monofluoride rCuF 1.745 ±0.000 1.619 -0.126 1 2
GaAs Gallium arsenide rGa#As 2.530 ±0.020 2.435 -0.095 1 2
KF Potassium Fluoride rKF 2.171 ±0.000 2.085 -0.086 1 2
As4 Arsenic tetramer rAsAs 2.435   2.358 -0.077 1 2
TiCl Titanium Monochloride rClTi 2.265 ±0.000 2.188 -0.077 1 2
CuH Copper monohydride rHCu 1.463   1.394 -0.069 1 2
C5H10 2-Pentene, (E)- rCC 1.576   1.508 -0.068 11 15
KBr Potassium Bromide rKBr 2.821 ±0.000 2.759 -0.061 1 2
NaF sodium fluoride rNaF 1.926 ±0.000 1.869 -0.057 1 2
NaLi lithium sodium rLiNa 2.889   2.834 -0.055 1 2
C5H6 Bicyclo[2.1.0]pent-2-ene rCC 1.560   1.506 -0.054 3 5
C6H5OCH3 Anisole rCO 1.399   1.345 -0.054 1 7
NaBr Sodium Bromide rNaBr 2.502 ±0.000 2.449 -0.054 1 2
C4H5N Cyclopropanecarbonitrile rCC 1.472   1.419 -0.053 6 8
C5H8 Bicyclo[2.1.0]pentane rCC 1.536   1.490 -0.046 1 5
CBr4 Carbon tetrabromide rCBr 1.942 ±0.002 1.897 -0.045 1 2
CH2O2 Dioxirane rOO 1.516 ±0.003 1.471 -0.045 4 5
KCl Potassium Chloride rKCl 2.667 ±0.000 2.622 -0.045 1 2
C5H10 2-Pentene, (Z)- rCC 1.561   1.517 -0.044 1 5
As2 Arsenic diatomic rAs#As 2.103   2.058 -0.044 1 2
ScH Scandium monohydride rHSc 1.775 ±0.000 1.734 -0.042 1 2
Se2 Selenium diatomic rSe=Se 2.166 ±0.001 2.125 -0.041 1 2
F2 Fluorine diatomic rFF 1.412   1.373 -0.039 1 2
NaCl Sodium Chloride rNaCl 2.361 ±0.000 2.322 -0.039 1 2
C4H5NO 3-Methylisoxazole rCC 1.514   1.474 -0.039 1 8
C6H5OCH3 Anisole rCO 1.433   1.394 -0.039 7 8
C5H9N Pentanenitrile rCC 1.478   1.440 -0.038 4 6
C4H5NO Isoxazole, 5-methyl- rCC 1.505   1.467 -0.038 1 5
HOBr Hypobromous acid rBrO 1.834   1.796 -0.038 2 3
CH2FCl fluorochloromethane rCF 1.370 ±0.001 1.333 -0.037 1 2
CH3Br methyl bromide rCBr 1.934 ±0.000 1.898 -0.036 1 2
C6H6 Fulvene rCH 1.130 ±0.030 1.095 -0.035 2 7
C5H6 1-Buten-3-yne, 2-methyl- rCC 1.445   1.410 -0.035 7 8
C2Cl2 dichloroacetylene rC#C 1.246 ±0.030 1.211 -0.035 1 2
C2H5F fluoroethane rCF 1.398 ±0.007 1.363 -0.035 1 3
C6H12 (E)-3-methylpent-2-ene rCC 1.551   1.517 -0.034 9 12
LiBr Lithium Bromide rLiBr 2.170 ±0.000 2.137 -0.033 1 2
C2H3N3 1H-1,2,4-Triazole rCN 1.377   1.344 -0.033 5 7
CH2ClCH2Cl Ethane, 1,2-dichloro- rCC 1.531   1.498 -0.033 1 2
CH2Br2 dibromomethane rCBr 1.925 ±0.002 1.892 -0.033 1 4
CH3NC methyl isocyanide rCN 1.426 ±0.003 1.393 -0.033 1 2
CHBr3 bromoform rCBr 1.924 ±0.005 1.892 -0.032 1 3
ClO Monochlorine monoxide rClO 1.596 ±0.001 1.564 -0.032 1 2
BrO Bromine monoxide rOBr 1.718   1.687 -0.031 1 2
FO Oxygen monofluoride rFO 1.354   1.323 -0.031 1 2
C4H4N2 Succinonitrile rCC 1.561   1.530 -0.031 1 2
C5H5N Bicyclo[1.1.0]butane-1-carbonitrile rCC 1.514   1.484 -0.030 3 9
CFCl3 Trichloromonofluoromethane rCF 1.345   1.315 -0.030 1 2
CHF2Cl difluorochloromethane rCF 1.350 ±0.010 1.320 -0.030 1 4
C5H12O Butane, 1-methoxy- rCO 1.415   1.386 -0.029 3 4
Br2 Bromine diatomic rBrBr 2.281   2.252 -0.029 1 2
C4H5N Cyclopropanecarbonitrile rCC 1.513   1.484 -0.029 9 10
BrF Bromine monofluoride rFBr 1.759 ±0.000 1.731 -0.028 1 2
FNO2 Nitryl fluoride rNF 1.467 ±0.015 1.439 -0.028 1 2
CH3NH2 methyl amine rCN 1.471 ±0.003 1.443 -0.028 1 2
OCSe Carbonyl selenide rC=Se 1.709   1.681 -0.028 1 3
C4H10O Methyl propyl ether rCO 1.413   1.385 -0.028 1 9
MgO magnesium oxide rMgO 1.749   1.722 -0.027 1 2
BrF3 Bromine trifluoride rFBr 1.810 ±0.000 1.783 -0.027 1 3
CH3COCl Acetyl Chloride rCC 1.506   1.479 -0.027 1 2
GeCl Germanium monochloride rCl-Ge 2.164 ±0.000 2.137 -0.027 1 2
C3H6O Propylene oxide rCC 1.513   1.486 -0.027 2 6
C5H8 1,3-Butadiene, 2-methyl- rCC 1.512   1.486 -0.026 2 5
C4H5N (E)-2-Butenenitrile rCC 1.432   1.406 -0.026 8 10
AsF Arsenic monofluoride rFAs 1.736 ±0.001 1.710 -0.026 1 2
CH2CHCH2CH2Cl 1-Butene, 4-chloro- rCC 1.508   1.482 -0.026 2 6
CH3ONO Methyl nitrite rCO 1.437   1.411 -0.026 1 2
C7H16 heptane rCC 1.534   1.509 -0.025 1 2
C9H8 Indene rCC 1.415 ±0.170 1.390 -0.025 1 2
C4H4N2 Succinonitrile rCC 1.465   1.440 -0.025 1 3
C5H8 Cyclopentene rCC 1.518   1.493 -0.025 2 4
C5H6 Bicyclo[2.1.0]pent-2-ene rCC 1.530   1.505 -0.025 1 3
CH3OCH3 Dimethyl ether rCO 1.411 ±0.001 1.386 -0.025 1 2
C3H4O Cyclopropanone rCC 1.575   1.551 -0.024 3 4
BrF5 bromine pentafluoride rFBr 1.774 ±0.003 1.751 -0.023 1 3
F2O Difluorine monoxide rFO 1.405   1.382 -0.023 1 2
C4H6 Bicyclo[1.1.0]butane rCC 1.497   1.474 -0.023 1 2
AlN Aluminum nitride rN#Al 1.786   1.765 -0.022 1 2
CSe2 Carbon diselenide rC=Se 1.692 ±0.000 1.671 -0.021 1 2
HO2 Hydroperoxy radical rOO 1.331   1.309 -0.021 1 2
C4H4N2 1,3-Diazine rC:N 1.350   1.329 -0.021 3 5
C5H5N Bicyclo[1.1.0]butane-1-carbonitrile rCC 1.518   1.497 -0.021 3 7
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCO 1.416   1.395 -0.021 1 5
NF nitrogen fluoride rNF 1.317   1.296 -0.021 1 2
CH3CH2CHO Propanal rCC 1.509   1.488 -0.021 2 3
CH3CH2CH2CH3 Butane rCC 1.531   1.511 -0.020 1 2
C5H8 Cyclobutane, methylene- rCC 1.524   1.504 -0.020 1 3
C3H7SH 1-Propanethiol rCC 1.529   1.509 -0.020 7 10
C6H8 1,3-Cyclohexadiene rCC 1.466   1.446 -0.020 2 3
C5H8 Ethenylcyclopropane rCC 1.475   1.455 -0.020 1 2
N2O3 Dinitrogen trioxide rN=O 1.217   1.197 -0.020 2 5
CH3OCHO methyl formate rCO 1.437   1.417 -0.020 1 2
C4H10O Methyl propyl ether rCC 1.530   1.510 -0.020 5 13
CH2CHCH2CH3 1-Butene rCC 1.536   1.516 -0.020 1 2
C4H10O Ethoxy ethane rCO 1.411   1.392 -0.019 1 2
C5H10 Cyclopropane, 1,1-dimethyl- rCC 1.514   1.495 -0.019 1 4
BrCl Bromine monochloride rClBr 2.136 ±0.000 2.117 -0.019 1 2
CH3CH2CHO Propanal rCC 1.523   1.504 -0.019 1 2
NaH sodium hydride rNaH 1.887 ±0.000 1.868 -0.019 1 2
C2H2O2 Ethanedial rCC 1.526   1.507 -0.019 1 2
C6H5OH phenol rCO 1.364   1.346 -0.018 1 7
C5H8 1,3-Butadiene, 2-methyl- rCC 1.463   1.445 -0.018 2 3
CH2NN diazomethane rC=N 1.300   1.282 -0.018 1 2
MgS magnesium sulfide rMgS 2.143   2.125 -0.018 1 2
C4H10O Ethoxy ethane rCC 1.517   1.499 -0.018 2 4
C8H8 cyclooctatetraene rCC 1.470 ±0.001 1.453 -0.018 1 5
CF3COOH trifluoroacetic acid rCC 1.546 ±0.005 1.529 -0.017 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.565   1.548 -0.017 3 4
CHClCCl2 Trichloroethylene rCCl 1.712   1.695 -0.017 2 6
C4H6 Cyclobutene rCC 1.517   1.500 -0.017 1 3
C6H6 Fulvene rCC 1.476 ±0.008 1.460 -0.016 5 6
C6H8 (Z)-hexa-1,3,5-triene rC=C 1.368   1.352 -0.016 1 2
C3H5ClO Oxirane, (chloromethyl)- rCC 1.475   1.459 -0.016 3 4
C2HF3 Trifluoroethylene rCF 1.316 ±0.011 1.301 -0.015 1 3
C4H10O Methyl propyl ether rCO 1.408   1.393 -0.015 9 10
C4H6O Cyclobutanone rCC 1.556   1.541 -0.015 3 5
CH2ClCH2Cl Ethane, 1,2-dichloro- rCCl 1.790   1.775 -0.015 1 3
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804   1.789 -0.015 8 9
C5H5N Pyridine rC:C 1.400   1.385 -0.015 2 5
ClCN chlorocyanogen rCCl 1.629   1.615 -0.014 1 2
GaF Gallium monofluoride rFGa 1.774 ±0.000 1.760 -0.014 1 2
C4H10O Propane, 2-methoxy- rCO 1.422   1.408 -0.014 5 14
CH2CCHCH3 1,2-Butadiene rC=C 1.314   1.300 -0.014 1 2
C6H6 Fulvene rCC 1.470 ±0.004 1.456 -0.014 1 3
C4H10O Methyl propyl ether rCC 1.516   1.502 -0.014 10 13
CHClCCl2 Trichloroethylene rCCl 1.720   1.707 -0.013 2 5
CH2CHCHO Acrolein rCC 1.470 ±0.003 1.457 -0.013 1 2
PCl5 Phosphorus pentachloride rPCl 2.124   2.111 -0.013 1 5
Si(CH3)4 tetramethylsilane rCH 1.115 ±7.000 1.102 -0.013 2 6
C2H3N3 1H-1,2,4-Triazole rC=N 1.329   1.317 -0.012 1 7
HNO3 Nitric acid rNO 1.406   1.394 -0.012 1 2
CH2CHCHO Acrolein rC=C 1.345 ±0.003 1.333 -0.012 2 3
CH3ONO Methyl nitrite rNO 1.398   1.386 -0.012 2 6
KH Potassium hydride rHK 2.243 ±0.001 2.231 -0.012 1 2
C7H16 heptane rCH 1.121 ±0.007 1.109 -0.012 1 8
CH3CH(NH2)COOH Alanine rCC 1.544   1.532 -0.012 3 4
CH2CHCH2CH3 1-Butene rCC 1.493   1.482 -0.011 2 3
CH2ClCH2Cl Ethane, 1,2-dichloro- rCH 1.112   1.101 -0.011 1 5
Si(CH3)4 tetramethylsilane rSiC 1.875 ±0.002 1.864 -0.011 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.528   1.517 -0.011 1 3
AlC Aluminum carbide rC=Al 1.955   1.944 -0.011 1 2
CH2CHCHO Acrolein rC=O 1.219 ±0.005 1.208 -0.011 1 4
LiOH lithium hydroxide rOH 0.969   0.958 -0.011 1 3
SiN Silicon nitride rSiN 1.575   1.565 -0.010 1 2
C3H8O2 1,3-Propanediol rOH 0.980   0.970 -0.010 6 8
PF5 Phosphorus pentafluoride rFP 1.577   1.567 -0.010 1 5
LiOH lithium hydroxide rLiO 1.582   1.572 -0.010 1 2
C5H10 2-Pentene, (Z)- rCC 1.490   1.480 -0.010 8 14
LiF lithium fluoride rLiF 1.564 ±0.000 1.554 -0.009 1 2
CH3CH2CH2CH3 Butane rCH 1.117   1.108 -0.009 1 5
HOCl hypochlorous acid rClO 1.691   1.681 -0.009 1 3
BF Boron monofluoride rBF 1.267 ±0.000 1.257 -0.009 1 2
CH2O2 Dioxirane rCO 1.388 ±0.004 1.379 -0.009 1 4
C6H6 Fulvene rC=C 1.349 ±0.002 1.340 -0.009 1 2
C2H6O2S Dimethyl sulfone rCS 1.777 ±0.006 1.769 -0.008 1 4
C2H2O2 Ethanedial rCH 1.132   1.124 -0.008 1 3
C5H8O 2H-Pyran, 3,4-dihydro- rCC 1.516   1.508 -0.008 10 13
SiC silicon monocarbide rC-Si 1.722   1.714 -0.008 1 2
C6H5OH phenol rC:C 1.398   1.391 -0.007 1 2
C2H5F fluoroethane rCC 1.505 ±0.007 1.498 -0.007 1 2
C2H Ethynyl radical rC#C 1.217   1.210 -0.007 1 2
ClOF3 Chlorine trifluoride oxide rFCl 1.713 ±0.003 1.706 -0.007 1 4
ClF Chlorine monofluoride rFCl 1.628 ±0.000 1.622 -0.006 1 2
H2CS Thioformaldehyde rC=S 1.611   1.605 -0.006 1 2
C5H7N Cyclobutanecarbonitrile rCC 1.551   1.545 -0.006 3 6
SF Monosulfur monofluoride rSF 1.599   1.593 -0.006 1 2
C3H6 Cyclopropane rCC 1.501   1.495 -0.006 1 2
BeF Beryllium monofluoride rBeF 1.361   1.355 -0.006 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804   1.798 -0.006 5 8
CH3COCl Acetyl Chloride rCH 1.105   1.099 -0.006 2 5
C6H8 (Z)-hexa-1,3,5-triene rCH 1.104   1.098 -0.006 1 7
SF4 Sulfur tetrafluoride rSF 1.646 ±0.003 1.641 -0.005 1 2
N(CH3)3 Trimethylamine rCH 1.109   1.104 -0.005 2 8
C10H8 naphthalene rC:C 1.410   1.405 -0.005 2 3
CaF Calcium monofluoride rFCa 1.967 ±0.001 1.962 -0.005 1 2
BrF3 Bromine trifluoride rFBr 1.721   1.716 -0.005 1 2
C4H6O Cyclobutanone rCC 1.527   1.522 -0.005 2 3
CH3OCHO methyl formate rCO 1.334   1.329 -0.005 2 3
BF3 Borane, trifluoro- rBF 1.307   1.302 -0.005 1 2
LiCl lithium chloride rLiCl 2.021 ±0.000 2.016 -0.004 1 2
B2H6 Diborane rBH 1.320   1.316 -0.004 1 3
SCl sulfur monochloride rSCl 1.975   1.971 -0.004 1 2
AlO Aluminum monoxide rAlO 1.618   1.614 -0.004 1 2
C6H6 Fulvene rC=C 1.355 ±0.004 1.351 -0.004 3 5
N2O3 Dinitrogen trioxide rN=O 1.202   1.198 -0.004 2 4
SeO2 Selenium dioxide rSeO 1.607 ±0.001 1.603 -0.004 1 2
Cl2 Chlorine diatomic rClCl 1.988   1.984 -0.004 1 2
AlF Aluminum monofluoride rAlF 1.654 ±0.000 1.651 -0.004 1 2
C5H8 Ethenylcyclopropane rCH 1.099   1.096 -0.003 1 6
SiH3F monofluorosilane rSiF 1.595   1.591 -0.003 1 2
CH3CH(NH2)COOH Alanine rCC 1.509   1.506 -0.003 2 3
CH3SeH Methane selenol rHSe 1.473 ±0.020 1.470 -0.003 1 3
C4H6 Methylenecyclopropane rCC 1.457   1.454 -0.003 2 5
CFCl3 Trichloromonofluoromethane rCCl 1.764   1.760 -0.003 1 3
SiF silicon monofluoride rSiF 1.604   1.601 -0.003 1 2
HSe Selenium monohydride rHSe 1.475 ±0.010 1.472 -0.003 1 2
HNCNH diiminomethane rC=N 1.224 ±0.001 1.221 -0.003 1 2
SOF4 Sulfur tetrafluoride oxide rF-S 1.596 ±0.003 1.593 -0.003 1 3
C5H5N Pyridine rC:C 1.390   1.387 -0.003 3 5
CH3COCl Acetyl Chloride rC=O 1.187   1.184 -0.003 1 3
CP Carbon monophosphide rC#P 1.562   1.560 -0.002 1 2
BeO beryllium oxide rBe=O 1.331   1.328 -0.002 1 2
AsH Arsenic monohydride rHAs 1.535 ±0.001 1.533 -0.002 1 2
CH3CH2CHO Propanal rCH 1.103   1.101 -0.002 1 6
CCl2O Phosgene rCCl 1.737   1.735 -0.002 2 3
SiH3Cl chlorosilane rSiCl 2.051   2.049 -0.002 1 2
LiO lithium oxide rLiO 1.688   1.687 -0.002 1 2
O2 Oxygen diatomic rO=O 1.208   1.206 -0.002 1 2
C3H3NO Oxazole rCO 1.357   1.356 -0.001 1 5
B2H6 Diborane rBH 1.200   1.199 -0.001 1 5
NS+ nitrogen sulfide cation rNS 1.440   1.439 -0.001 1 2
C5H8 Spiropentane rCC 1.470   1.469 -0.001 1 2
NO Nitric oxide rN=O 1.154 ±0.000 1.153 -0.000 1 2
C5H10 2-Pentene, (E)- rCC 1.484   1.484 -0.000 4 11
AlS Aluminum sulfide rAlS 2.029   2.029 -0.000 1 2
C8H8 cubane rCH 1.097   1.097 -0.000 1 9
GeH germylidene rHGe 1.588   1.588 0.000 1 2
C4H4N2 1,3-Diazine rC:N 1.328   1.328 0.000 2 6
O2+ diatomic oxygen cation rOO 1.116   1.117 0.000 1 2
C8H8 cyclooctatetraene rC=C 1.337 ±0.001 1.338 0.001 1 2
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCO 1.353   1.354 0.001 5 10
PN Phosphorus mononitride rP#N 1.491   1.492 0.001 1 2
FNO2 Nitryl fluoride rN=O 1.180 ±0.005 1.181 0.001 1 3
CH3COCl Acetyl Chloride rCCl 1.798   1.799 0.001 1 4
CCl carbon monochloride rCCl 1.649   1.651 0.001 1 2
GeF+ Germanium monofluoride cation rFGe 1.665 ±0.000 1.667 0.002 1 2
OCSe Carbonyl selenide rC=O 1.159   1.160 0.002 1 2
HBr hydrogen bromide rHBr 1.414 ±0.000 1.416 0.002 1 2
C2H2 Acetylene rC#C 1.203   1.205 0.002 1 2
C6H8 (Z)-hexa-1,3,5-triene rC=C 1.337   1.339 0.002 3 5
BeCl beryllium monochloride rBeCl 1.797   1.799 0.002 1 2
CN Cyano radical rC#N 1.172   1.174 0.002 1 2
SiF4 Silicon tetrafluoride rSiF 1.554   1.556 0.002 1 2
CH3ONO Methyl nitrite rCH 1.102   1.104 0.002 1 4
BO boron monoxide rB=O 1.205   1.207 0.002 1 2
P2 Phosphorus diatomic rP#P 1.893   1.896 0.002 1 2
HClO4 perchloric acid rHO 0.980   0.982 0.002 3 6
CCl2O Phosgene rC=O 1.177   1.179 0.002 1 2
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCH 1.087   1.090 0.003 11 12
SOCl2 thionyl chloride rS=O 1.443 ±0.006 1.446 0.003 1 2
C6H8 1,3-Cyclohexadiene rCH 1.100   1.103 0.003 5 11
N2O3 Dinitrogen trioxide rN=O 1.142   1.145 0.003 1 3
SiF2 Silicon difluoride rFSi 1.590 ±0.000 1.593 0.003 1 2
CH2CHCl Ethene, chloro- rCH 1.090   1.093 0.003 1 4
BeS beryllium sulfide rBe=S 1.742   1.745 0.003 1 2
HClO4 perchloric acid rO=Cl 1.414 ±0.001 1.417 0.003 1 2
SiP Silicon monophosphide rSiP 2.078 ±0.002 2.081 0.003 1 2
BN boron nitride rB=N 1.325   1.329 0.004 1 2
HClO4 perchloric acid rOCl 1.641 ±0.002 1.645 0.004 1 3
C2H3N3 1H-1,2,4-Triazole rCN 1.348   1.352 0.004 1 2
NO+ nitric oxide cation rN=O 1.066   1.070 0.004 1 2
CH2CO Ketene rC=O 1.162   1.166 0.004 2 3
CH3CH2OH Ethanol rCH 1.098   1.102 0.004 1 6
CH2PH H2CPH rCH 1.090 ±0.015 1.094 0.004 1 3
CH3NH2 methyl amine rNH 1.018 ±0.001 1.022 0.004 2 6
CN- cyanide anion rC#N 1.177 ±0.004 1.181 0.004 1 2
SiH2Cl2 dichlorosilane rSiCl 2.033 ±0.003 2.037 0.004 1 4
CH3ONO Methyl nitrite rN=O 1.182   1.186 0.004 6 7
CH3CH2CHO Propanal rCH 1.096   1.100 0.004 1 5
CH2NN diazomethane rN=N 1.139   1.143 0.004 2 3
CH3CH2CHO Propanal rCH 1.105   1.109 0.004 2 8
C6H8 1,3-Cyclohexadiene rCH 1.090   1.095 0.005 1 7
AlCl Aluminum monochloride rAlCl 2.130 ±0.000 2.135 0.005 1 2
F2SO Thionyl Fluoride rFS 1.585 ±0.000 1.590 0.005 1 3
C2Cl2 dichloroacetylene rCCl 1.612 ±0.030 1.617 0.005 1 3
CH2 Methylene rCH 1.085   1.090 0.005 1 2
SiO Silicon monoxide rSiO 1.510 ±0.000 1.515 0.005 1 2
NO- nitric oxide anion rN=O 1.258 ±0.010 1.263 0.005 1 2
CH2NH Methanimine rCH 1.103   1.108 0.005 1 3
C3H4N2 1H-Pyrazole rCH 1.082   1.088 0.006 1 2
PS phosphorus sulfide rP=S 1.900   1.906 0.006 1 2
CO+ carbon monoxide cation rC=O 1.115 ±0.000 1.121 0.006 1 2
CH3CH(CH3)CH3 Isobutane rCH 1.100   1.106 0.006 3 6
CH3NO3 Methyl nitrate rNO 1.402   1.408 0.006 1 4
S2+ sulfur dimer cation rS=S 1.825 ±0.010 1.831 0.006 1 2
CF3COOH trifluoroacetic acid rC=O 1.192 ±0.003 1.198 0.006 2 4
CO Carbon monoxide rC#O 1.128 ±0.000 1.134 0.006 1 2
ClCN chlorocyanogen rC#N 1.161   1.167 0.006 2 3
CH2PH H2CPH rCH 1.090 ±0.015 1.096 0.006 1 4
BS boron sulfide rBS 1.609   1.615 0.006 1 2
C3H4N2 1H-Pyrazole rCH 1.083   1.089 0.006 5 6
C4H4N2 1,3-Diazine rCH 1.087   1.093 0.006 1 7
N2 Nitrogen diatomic rN#N 1.098   1.104 0.006 1 2
CH2C(CH3)CH3 1-Propene, 2-methyl- rCH 1.088   1.094 0.006 2 3
C3H4N2 1H-Pyrazole rCH 1.080   1.087 0.007 3 4
CCl2 dichloromethylene rCCl 1.711   1.718 0.007 1 2
SiH2Cl2 dichlorosilane rSiH 1.480 ±0.015 1.487 0.007 1 2
SiHCl3 Trichlorosilane rSiCl 2.020   2.027 0.007 1 3
HNCO Isocyanic acid rC=O 1.164   1.170 0.007 3 4
CH3CH2SH ethanethiol rCH 1.095   1.102 0.007 1 4
CS carbon monosulfide rC#S 1.535   1.542 0.007 1 2
CH2CO Ketene rCH 1.083   1.089 0.007 1 4
CH2CHCHO Acrolein rCH 1.086 ±0.007 1.093 0.007 3 7
CH3ONO Methyl nitrite rCH 1.090   1.097 0.007 1 3
CH3CCH propyne rCH 1.096   1.104 0.008 1 5
PCl5 Phosphorus pentachloride rPCl 2.020   2.028 0.008 1 2
C6H12 Cyclohexane rCH 1.101   1.109 0.008 1 7
CH3NO3 Methyl nitrate rCH 1.095   1.103 0.008 5 8
H2Se Hydrogen selenide rHSe 1.460   1.468 0.008 1 2
CH3NHCH3 Dimethylamine rCH 1.098   1.106 0.008 3 7
PF5 Phosphorus pentafluoride rPF 1.534   1.542 0.008 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.097   1.105 0.008 5 6
C4H10O Methyl propyl ether rCH 1.093   1.102 0.009 5 6
Cl2+ chlorine diatomic cation rClCl 1.892   1.900 0.009 1 2
C4H10O Methyl propyl ether rCH 1.107   1.116 0.009 10 11
CH3NC methyl isocyanide rCH 1.094   1.103 0.009 1 4
DF Hydrofluoric acid-d rDF 0.917 ±0.000 0.926 0.009 1 2
CH3CHS Thioacetaldehyde rCH 1.098   1.107 0.009 2 6
BrF5 bromine pentafluoride rFBr 1.689 ±0.008 1.698 0.009 1 2
C4H10O Ethoxy ethane rCH 1.092   1.101 0.009 4 10
SiS silicon monosulfide rSiS 1.929 ±0.000 1.938 0.009 1 2
C3H6 Cyclopropane rCH 1.083   1.092 0.009 1 4
SO+ sulfur monoxide cation rO=S 1.424   1.433 0.009 1 2
BCl boron monochloride rBCl 1.719 ±0.000 1.729 0.009 1 2
HF Hydrogen fluoride rHF 0.917 ±0.000 0.926 0.009 1 2
C3H8 Propane rCH 1.096   1.106 0.010 1 4
CH3CHS Thioacetaldehyde rCH 1.090   1.100 0.010 2 5
PO Phosphorus monoxide rP=O 1.476   1.486 0.010 1 2
C2H2 Acetylene rCH 1.063   1.073 0.010 1 3
C4H8 cyclobutane rCH 1.093   1.103 0.010 1 5
C4H8 cyclobutane rCH 1.091   1.101 0.010 1 6
C4H6 Cyclobutene rCH 1.094   1.104 0.010 3 7
C4H10O Methyl propyl ether rCH 1.091   1.101 0.010 5 8
SSO Disulfur monoxide rS=O 1.456   1.466 0.010 1 2
C4H6 Cyclobutene rCH 1.083   1.093 0.010 1 5
CH3NC methyl isocyanide rC#N 1.166 ±0.003 1.176 0.010 2 3
CH2FCl fluorochloromethane rCCl 1.762 ±0.000 1.772 0.010 1 3
C2 Carbon diatomic rC=C 1.243   1.253 0.010 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.092   1.102 0.010 1 3
CH3CH2SH ethanethiol rCH 1.092   1.103 0.011 1 5
C6H5OH phenol rCH 1.082   1.093 0.011 4 11
ArH+ Argon hydride cation rHAr 1.292 ±0.000 1.303 0.011 1 2
C4H6S Thiophene, 2,5-dihydro- rCH 1.095   1.106 0.011 2 6
C6H12 Cyclohexane rCH 1.093   1.104 0.011 1 13
CH3OCHO methyl formate rCH 1.101   1.112 0.011 3 8
CH3CH(CH3)CH3 Isobutane rCH 1.092   1.103 0.011 3 9
C2H5F fluoroethane rCH 1.091 ±0.007 1.102 0.011 2 6
H2O Water rOH 0.958 ±0.000 0.969 0.011 1 2
HCCCN Cyanoacetylene rCH 1.062 ±0.001 1.074 0.011 4 5
C3H4O Methylketene rCH 1.083   1.094 0.011 2 5
CH3CCH propyne rCH 1.060   1.071 0.011 3 4
CH4 Methane rCH 1.087 ±0.001 1.098 0.011 1 2
C4H10O Methyl propyl ether rCH 1.094   1.105 0.011 13 14
C6H8 1,4-Cyclohexadiene rCH 1.100   1.111 0.011 1 11
C6H6 Fulvene rCH 1.080 ±0.005 1.092 0.012 5 11
CH2CHCHO Acrolein rCH 1.084 ±0.005 1.096 0.012 2 6
C5H10 2-Pentene, (Z)- rCH 1.092   1.104 0.012 1 2
CH2CHCHO Acrolein rCH 1.086 ±0.007 1.098 0.012 3 8
C4H10O Ethoxy ethane rCH 1.090   1.102 0.012 4 12
C2H5F fluoroethane rCH 1.090 ±0.007 1.102 0.012 2 7
CH3CH2SH ethanethiol rCH 1.090   1.102 0.012 2 7
C6H6 Fulvene rCH 1.078 ±0.005 1.090 0.012 3 9
CH3OCHO methyl formate rCH 1.086   1.098 0.012 1 5
CH3NO3 Methyl nitrate rCH 1.088   1.100 0.012 5 6
C2H5N Aziridine rCH 1.084   1.096 0.012 3 6
BH3 boron trihydride rBH 1.190   1.202 0.012 1 2
AsH3 Arsine rHAs 1.511 ±0.000 1.523 0.012 1 2
PO- phosphorus monoxide anion rOP 1.540   1.552 0.012 1 2
C2H6O2S Dimethyl sulfone rS=O 1.431 ±0.004 1.444 0.013 1 2
C2H5N Aziridine rCH 1.083   1.096 0.013 3 5
CH3CH2CHO Propanal rCH 1.115   1.128 0.013 3 10
C3H4 cyclopropene rCH 1.072   1.085 0.013 2 4
MgOH magnesium hydroxide rMgO 1.767   1.780 0.013 1 2
CH2NN diazomethane rHC 1.075   1.088 0.013 1 4
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.090   1.103 0.013 9 11
CHONH2 formamide rNH 1.001   1.014 0.013 3 6
C6H5OH phenol rCH 1.084   1.097 0.013 2 9
CH3CH2OH Ethanol rCH 1.088   1.101 0.013 1 5
CH3CH2Cl Ethyl chloride rCH 1.090   1.104 0.013 1 3
C3H4 cyclopropene rCH 1.088   1.101 0.013 1 6
CH3CHO Acetaldehyde rCH 1.086   1.099 0.013 2 5
CH2CHCl Ethene, chloro- rCH 1.079   1.092 0.013 2 5
SiH4 Silane rSiH 1.480 ±0.000 1.493 0.014 1 2
HS+ sulfur monohydride cation rHS 1.374   1.388 0.014 1 2
C3H7SH 1-Propanethiol rCH 1.090   1.104 0.014 8 10
C5H10 Cyclopropane, 1,1-dimethyl- rCH 1.080   1.094 0.014 2 6
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.089   1.103 0.014 9 10
S2 Sulfur diatomic rS=S 1.889   1.903 0.014 1 2
C3H7SH 1-Propanethiol rCH 1.092   1.106 0.014 5 7
CH2O2 Dioxirane rCH 1.090 ±0.002 1.104 0.014 1 2
CH2FCl fluorochloromethane rCH 1.090 ±0.010 1.104 0.014 1 4
BeH2 beryllium dihydride rHBe 1.326 ±0.000 1.341 0.014 1 2
C2H5F fluoroethane rCH 1.095 ±0.007 1.109 0.014 1 4
C4H10O Methyl propyl ether rCH 1.099   1.113 0.014 1 2
CH3CHO Acetaldehyde rCH 1.114   1.128 0.014 1 4
PF+ phosphorus monofluoride cation rFP 1.500   1.515 0.015 1 2
HO2 Hydroperoxy radical rOH 0.971   0.985 0.015 1 3
HOBr Hypobromous acid rOH 0.961   0.976 0.015 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.087   1.102 0.015 1 2
CH2CHF Ethene, fluoro- rCH 1.077   1.092 0.015 2 5
CH3OCH3 Dimethyl ether rCH 1.099 ±0.001 1.114 0.015 2 6
CH3CH2Cl Ethyl chloride rCH 1.086   1.101 0.015 2 7
SO Sulfur monoxide rS=O 1.481   1.496 0.015 1 2
P2H4 H2PPH2 rPH 1.417   1.432 0.015 1 3
C5H8 Bicyclo[2.1.0]pentane rCC 1.507   1.522 0.015 1 2
NS Mononitrogen monosulfide rNS 1.497 ±0.000 1.512 0.015 1 2
OH Hydroxyl radical rOH 0.970   0.985 0.015 1 2
SOF4 Sulfur tetrafluoride oxide rF-S 1.539 ±0.003 1.554 0.015 1 5
CH3Br methyl bromide rCH 1.082 ±0.001 1.097 0.015 1 3
CH2CHF Ethene, fluoro- rCH 1.082   1.097 0.015 1 4
C4H10O Propane, 2-methoxy- rCH 1.095   1.111 0.016 1 2
SSO Disulfur monoxide rS=S 1.884   1.900 0.016 2 3
CHONH2 formamide rNH 1.001   1.017 0.016 3 5
SiH3Cl chlorosilane rSiH 1.475   1.491 0.016 1 3
HS Mercapto radical rSH 1.341   1.357 0.016 1 2
C4H10O Ethoxy ethane rCH 1.100   1.117 0.017 2 6
OH- hydroxide anion rOH 0.964   0.981 0.017 1 2
DCl Hydrochloric acid-d rDCl 1.275 ±0.000 1.291 0.017 1 2
HCl Hydrogen chloride rHCl 1.275 ±0.000 1.291 0.017 1 2
CH3CHS Thioacetaldehyde rCH 1.089   1.106 0.017 1 4
SiHCl3 Trichlorosilane rSiH 1.464   1.481 0.017 1 2
CH3OCH3 Dimethyl ether rCH 1.085 ±0.001 1.102 0.017 2 4
C4H4N2 1,3-Diazine rCH 1.082   1.099 0.017 2 8
SF4 Sulfur tetrafluoride rSF 1.545 ±0.003 1.562 0.017 1 4
BeH beryllium monohydride rBeH 1.343   1.360 0.017 1 2
P2H4 H2PPH2 rPH 1.414   1.431 0.017 1 4
C3H4O Methylketene rCH 1.083   1.100 0.017 3 6
SiH3F monofluorosilane rSiH 1.476   1.494 0.018 1 3
ClFO3 Perchloryl fluoride rCl=O 1.400   1.418 0.018 2 3
MgH+ magnesium monohydride cation rHMg 1.652   1.670 0.018 1 2
CH3NHCH3 Dimethylamine rCH 1.084   1.102 0.018 3 9
C6H5OH phenol rCH 1.076   1.094 0.018 3 10
C2H3N3 1H-1,2,4-Triazole rC=N 1.305   1.324 0.019 2 4
NH2CONH2 Urea rNH 0.998   1.016 0.019 4 8
F2SO Thionyl Fluoride rO=S 1.413 ±0.000 1.432 0.019 1 2
C4H4N2 1,3-Diazine rCH 1.079   1.099 0.020 3 9
C3O2 Carbon suboxide rC=O 1.146   1.166 0.020 2 4
CH3NHCH3 Dimethylamine rCH 1.098   1.118 0.020 3 5
B2 Boron diatomic rBB 1.590   1.610 0.020 1 2
CH3NH2 methyl amine rCH 1.093 ±0.000 1.113 0.020 1 3
C8H8 cyclooctatetraene rCH 1.079 ±0.001 1.100 0.020 1 9
C2H3 vinyl rCH 1.085   1.105 0.020 2 4
NH Imidogen rNH 1.036   1.057 0.021 1 2
D2 Deuterium diatomic rDD 0.742   0.763 0.022 1 2
H2 Hydrogen diatomic rHH 0.741   0.763 0.022 1 2
HD Deuterium hydride rDH 0.741   0.763 0.022 1 2
CH2CHCHO Acrolein rCH 1.108 ±0.005 1.130 0.022 1 5
MgOH magnesium hydroxide rOH 0.940   0.962 0.022 1 3
C3O2 Carbon suboxide rC=C 1.251   1.273 0.022 1 2
HClO4 perchloric acid rO=Cl 1.404 ±0.001 1.427 0.023 1 4
C3H7N Cyclopropylamine rCH 1.080   1.103 0.023 1 2
ClFO3 Perchloryl fluoride rFCl 1.598   1.624 0.026 1 2
SiH Silylidyne rSiH 1.520   1.546 0.026 1 2
C2H Ethynyl radical rCH 1.047   1.074 0.027 1 3
ClOF3 Chlorine trifluoride oxide rFCl 1.603 ±0.004 1.630 0.027 1 3
CH3CH2OH Ethanol rCH 1.086   1.113 0.027 2 8
C4H10O Methyl propyl ether rCH 1.086   1.113 0.027 1 4
CHF2Cl difluorochloromethane rCCl 1.747 ±0.010 1.775 0.028 1 3
LiH Lithium Hydride rLiH 1.595 ±0.000 1.624 0.029 1 2
C3H5 Allyl radical rCH 1.069   1.098 0.029 1 2
C4H4N2 Pyridazine rCH 1.064   1.094 0.030 1 5
AlH aluminum monohydride rAlH 1.648   1.678 0.030 1 2
N(CH3)3 Trimethylamine rCH 1.088   1.121 0.033 2 5
CaCl calcium monochloride rClCa 2.437   2.470 0.033 1 2
BH Boron monohydride rBH 1.232   1.266 0.034 1 2
SiH+ silicon monohydride cation rHSi 1.504   1.539 0.035 1 2
C5H10 2-Pentene, (Z)- rCH 1.058   1.100 0.042 12 13
Li2 Lithium diatomic rLiLi 2.673   2.717 0.044 1 2
CaH Calcium monohydride rHCa 2.003 ±0.000 2.079 0.077 1 2
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 ±0.040 2.248 0.208 1 3
CH3OC2H5 Ethane, methoxy- rCH 1.087   1.386 0.299 1 2
C3H3NO Oxazole rCH 1.075   1.377 0.302 3 4
465 molecules.