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 MP2/6-31+G**

Species Name Bond type Bond Length (Å)
Experimental unc. Calculated Difference atom1 atom2
SiP Silicon monophosphide rSiP 2.078 ±0.002 1.993 -0.085 1 2
PS phosphorus sulfide rP=S 1.900   1.820 -0.080 1 2
Si2 Silicon diatomic rSiSi 2.246   2.171 -0.075 1 2
C5H10 2-Pentene, (E)- rCC 1.576   1.524 -0.052 11 15
C5H6 Bicyclo[2.1.0]pent-2-ene rCC 1.560   1.512 -0.048 3 5
LiO lithium oxide rLiO 1.688   1.640 -0.048 1 2
SiN Silicon nitride rSiN 1.575   1.539 -0.037 1 2
CN Cyano radical rC#N 1.172   1.136 -0.036 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.536   1.501 -0.035 1 5
NS Mononitrogen monosulfide rNS 1.497 ±0.000 1.462 -0.035 1 2
C2H Ethynyl radical rC#C 1.217   1.184 -0.033 1 2
C5H10 2-Pentene, (Z)- rCC 1.561   1.529 -0.032 1 5
C2H2O2 Ethanedial rCH 1.132   1.100 -0.032 1 3
CP Carbon monophosphide rC#P 1.562   1.531 -0.031 1 2
C4H5N Cyclopropanecarbonitrile rCC 1.472   1.444 -0.028 6 8
C2Cl2 dichloroacetylene rC#C 1.246 ±0.030 1.220 -0.026 1 2
C7H16 heptane rCH 1.121 ±0.007 1.095 -0.026 1 8
CH2ClCH2Cl Ethane, 1,2-dichloro- rCH 1.112   1.086 -0.026 1 5
C6H5OCH3 Anisole rCO 1.399   1.375 -0.024 1 7
CH3OCl methyl hypochlorite rHC 1.111 ±0.018 1.087 -0.024 3 4
C4H4N2 Succinonitrile rCC 1.561   1.538 -0.023 1 2
Si(CH3)4 tetramethylsilane rCH 1.115 ±7.000 1.092 -0.023 2 6
AsH Arsenic monohydride rHAs 1.535 ±0.001 1.512 -0.023 1 2
CH3CH2CH2CH3 Butane rCH 1.117   1.094 -0.023 1 5
HS+ sulfur monohydride cation rHS 1.374   1.352 -0.023 1 2
CH3SeH Methane selenol rHSe 1.473 ±0.020 1.450 -0.023 1 3
C5H5N Bicyclo[1.1.0]butane-1-carbonitrile rCC 1.514   1.492 -0.022 3 9
ArH+ Argon hydride cation rHAr 1.292 ±0.000 1.270 -0.022 1 2
HSe Selenium monohydride rHSe 1.475 ±0.010 1.453 -0.022 1 2
C2H3N3 1H-1,2,4-Triazole rCN 1.377   1.355 -0.022 5 7
C6H12 (E)-3-methylpent-2-ene rCC 1.551   1.531 -0.020 9 12
N(CH3)3 Trimethylamine rCH 1.109   1.089 -0.020 2 8
CH3COCl Acetyl Chloride rCH 1.105   1.086 -0.019 2 5
C4H5NO 3-Methylisoxazole rCC 1.514   1.495 -0.019 1 8
C6H8 (Z)-hexa-1,3,5-triene rCH 1.104   1.086 -0.018 1 7
CH2ClCH2Cl Ethane, 1,2-dichloro- rCC 1.531   1.514 -0.017 1 2
C4H5N Cyclopropanecarbonitrile rCC 1.513   1.496 -0.017 9 10
ScH Scandium monohydride rHSc 1.775 ±0.000 1.759 -0.017 1 2
SiH2Cl2 dichlorosilane rSiH 1.480 ±0.015 1.463 -0.017 1 2
C5H5N Bicyclo[1.1.0]butane-1-carbonitrile rCC 1.518   1.501 -0.017 3 7
B2H6 Diborane rBH 1.200   1.184 -0.016 1 5
C4H5NO Isoxazole, 5-methyl- rCC 1.505   1.490 -0.016 1 5
C5H8 Ethenylcyclopropane rCH 1.099   1.084 -0.015 1 6
CH3CH2CHO Propanal rCH 1.103   1.088 -0.015 1 6
OCSe Carbonyl selenide rC=Se 1.709   1.694 -0.015 1 3
B2H6 Diborane rBH 1.320   1.306 -0.014 1 3
C3H8O2 1,3-Propanediol rOH 0.980   0.966 -0.014 6 8
BCl boron monochloride rBCl 1.719 ±0.000 1.706 -0.014 1 2
CH3ONO Methyl nitrite rCH 1.102   1.088 -0.014 1 4
C3H6O Propylene oxide rCC 1.513   1.500 -0.013 2 6
LiOH lithium hydroxide rOH 0.969   0.956 -0.013 1 3
CH2NH Methanimine rCH 1.103   1.090 -0.013 1 3
CO+ carbon monoxide cation rC=O 1.115 ±0.000 1.103 -0.013 1 2
SiC silicon monocarbide rC-Si 1.722   1.710 -0.012 1 2
C9H8 Indene rCC 1.415 ±0.170 1.403 -0.012 1 2
C2H2O2 Ethanedial rCC 1.526   1.514 -0.012 1 2
H2Se Hydrogen selenide rHSe 1.460   1.448 -0.012 1 2
C4H4N2 1,3-Diazine rC:N 1.350   1.338 -0.012 3 5
C3H5ClO Oxirane, (chloromethyl)- rCC 1.475   1.463 -0.012 3 4
C5H6 Bicyclo[2.1.0]pent-2-ene rCC 1.530   1.519 -0.011 1 3
NO Nitric oxide rN=O 1.154 ±0.000 1.143 -0.011 1 2
P2H4 H2PPH2 rPH 1.417   1.406 -0.011 1 3
CH2 Methylene rCH 1.085   1.074 -0.011 1 2
C5H9N Pentanenitrile rCC 1.478   1.468 -0.010 4 6
BH Boron monohydride rBH 1.232   1.222 -0.010 1 2
CH3CH2CHO Propanal rCH 1.105   1.095 -0.010 2 8
CH2CHCl Ethene, chloro- rCH 1.090   1.080 -0.010 1 4
CH3CHO Acetaldehyde rCH 1.114   1.104 -0.010 1 4
CH3CH2CHO Propanal rCH 1.115   1.105 -0.010 3 10
CH3CH2OH Ethanol rCH 1.098   1.089 -0.009 1 6
P2H4 H2PPH2 rPH 1.414   1.405 -0.009 1 4
CuH Copper monohydride rHCu 1.463   1.454 -0.009 1 2
C6H8 (Z)-hexa-1,3,5-triene rC=C 1.368   1.359 -0.009 1 2
SiH+ silicon monohydride cation rHSi 1.504   1.495 -0.009 1 2
CH2CHCH2CH2Cl 1-Butene, 4-chloro- rCC 1.508   1.499 -0.009 2 6
AsH3 Arsine rHAs 1.511 ±0.000 1.502 -0.009 1 2
C8H8 cubane rCH 1.097   1.088 -0.009 1 9
C5H8 Cyclopentene rCC 1.518   1.509 -0.009 2 4
CH3OCHO methyl formate rCH 1.101   1.093 -0.008 3 8
CH3NO3 Methyl nitrate rCH 1.095   1.087 -0.008 5 8
SiH3F monofluorosilane rSiH 1.476   1.468 -0.008 1 3
C7H16 heptane rCC 1.534   1.526 -0.008 1 2
D2 Deuterium diatomic rDD 0.742   0.734 -0.008 1 2
C5H8 1,3-Butadiene, 2-methyl- rCC 1.512   1.504 -0.008 2 5
CH2PH H2CPH rCH 1.090 ±0.015 1.082 -0.008 1 3
H2 Hydrogen diatomic rHH 0.741   0.734 -0.008 1 2
HD Deuterium hydride rDH 0.741   0.734 -0.008 1 2
CH3NHCH3 Dimethylamine rCH 1.098   1.091 -0.007 3 7
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCH 1.087   1.080 -0.007 11 12
CH3NC methyl isocyanide rCH 1.094   1.087 -0.007 1 4
CH3CH(CH3)CH3 Isobutane rCH 1.100   1.093 -0.007 3 6
C4H10O Methyl propyl ether rCH 1.107   1.100 -0.007 10 11
CH3CH2CHO Propanal rCH 1.096   1.089 -0.007 1 5
CH3NH2 methyl amine rCN 1.471 ±0.003 1.464 -0.007 1 2
SiH4 Silane rSiH 1.480 ±0.000 1.473 -0.007 1 2
CH2PH H2CPH rCH 1.090 ±0.015 1.083 -0.007 1 4
SiH3Cl chlorosilane rSiH 1.475   1.468 -0.007 1 3
CH3COCl Acetyl Chloride rCCl 1.798   1.791 -0.007 1 4
CH3CCH propyne rCH 1.096   1.089 -0.007 1 5
C4H4N2 1,3-Diazine rCH 1.087   1.080 -0.007 1 7
CF3COOH trifluoroacetic acid rCC 1.546 ±0.005 1.539 -0.007 1 2
C6H5OCH3 Anisole rCO 1.433   1.426 -0.007 7 8
C3H7SH 1-Propanethiol rCC 1.529   1.523 -0.006 7 10
GeH germylidene rHGe 1.588   1.582 -0.006 1 2
HBr hydrogen bromide rHBr 1.414 ±0.000 1.408 -0.006 1 2
PH phosphorus monohydride rPH 1.422   1.416 -0.006 1 2
CH3ONO Methyl nitrite rCH 1.090   1.084 -0.006 1 3
CH Methylidyne rCH 1.120   1.114 -0.006 1 2
CH3COCl Acetyl Chloride rCC 1.506   1.500 -0.006 1 2
C5H6 1-Buten-3-yne, 2-methyl- rCC 1.445   1.439 -0.006 7 8
CH2CO Ketene rCH 1.083   1.077 -0.006 1 4
CH2ClCH2Cl Ethane, 1,2-dichloro- rCCl 1.790   1.784 -0.006 1 3
C2H5F fluoroethane rCH 1.095 ±0.007 1.089 -0.006 1 4
CH2C(CH3)CH3 1-Propene, 2-methyl- rCH 1.088   1.082 -0.006 2 3
C5H10 Cyclopropane, 1,1-dimethyl- rCC 1.514   1.508 -0.006 1 4
C4H10O Methyl propyl ether rCC 1.530   1.524 -0.006 5 13
CH3CHS Thioacetaldehyde rCH 1.098   1.092 -0.006 2 6
C6H12 Cyclohexane rCH 1.101   1.096 -0.006 1 7
HS Mercapto radical rSH 1.341   1.335 -0.005 1 2
CH2CHCHO Acrolein rCH 1.086 ±0.007 1.081 -0.005 3 7
CH3CH(NH2)COOH Alanine rCC 1.544   1.539 -0.005 3 4
SiHCl3 Trichlorosilane rSiH 1.464   1.459 -0.005 1 2
CH3CH2SH ethanethiol rCH 1.095   1.090 -0.005 1 4
CH2FCl fluorochloromethane rCH 1.090 ±0.010 1.085 -0.005 1 4
CH3NH2 methyl amine rNH 1.018 ±0.001 1.013 -0.005 2 6
CH3CH2CH2CH3 Butane rCC 1.531   1.526 -0.005 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.097   1.092 -0.005 5 6
DS Mercapto-d rSD 1.341   1.335 -0.005 1 2
CFCl3 Trichloromonofluoromethane rCCl 1.764   1.758 -0.005 1 3
CH2O2 Dioxirane rCH 1.090 ±0.002 1.085 -0.005 1 2
SiH Silylidyne rSiH 1.520   1.515 -0.005 1 2
C3H4N2 1H-Pyrazole rCH 1.083   1.078 -0.005 5 6
C4H10O Ethoxy ethane rCC 1.517   1.512 -0.005 2 4
C4H4N2 1,3-Diazine rCH 1.082   1.077 -0.005 2 8
C5H8 Bicyclo[2.1.0]pentane rCC 1.565   1.560 -0.005 3 4
DCl Hydrochloric acid-d rDCl 1.275 ±0.000 1.270 -0.005 1 2
HCl Hydrogen chloride rHCl 1.275 ±0.000 1.270 -0.005 1 2
BH3 boron trihydride rBH 1.190   1.186 -0.004 1 2
BN boron nitride rB=N 1.325   1.321 -0.004 1 2
C4H10O Methyl propyl ether rCH 1.093   1.089 -0.004 5 6
C3H4N2 1H-Pyrazole rCH 1.082   1.078 -0.004 1 2
C6H8 1,4-Cyclohexadiene rCH 1.100   1.096 -0.004 1 11
CH3OCH3 Dimethyl ether rCH 1.099 ±0.001 1.095 -0.004 2 6
C5H12O Butane, 1-methoxy- rCO 1.415   1.411 -0.004 3 4
C4H6S Thiophene, 2,5-dihydro- rCH 1.095   1.091 -0.004 2 6
C3H4N2 1H-Pyrazole rCH 1.080   1.076 -0.004 3 4
BeH beryllium monohydride rBeH 1.343   1.339 -0.003 1 2
C3H8 Propane rCH 1.096   1.093 -0.003 1 4
AlS Aluminum sulfide rAlS 2.029   2.026 -0.003 1 2
C5H8 Cyclobutane, methylene- rCC 1.524   1.521 -0.003 1 3
CH3CH2CHO Propanal rCC 1.509   1.506 -0.003 2 3
C4H6O Cyclobutanone rCC 1.556   1.553 -0.003 3 5
CH2CHCHO Acrolein rCH 1.108 ±0.005 1.105 -0.003 1 5
CH3NO3 Methyl nitrate rCH 1.088   1.085 -0.003 5 6
C4H6 Cyclobutene rCH 1.094   1.091 -0.003 3 7
CH3CHS Thioacetaldehyde rCH 1.090   1.087 -0.003 2 5
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.092   1.089 -0.003 1 3
CH2CHCHO Acrolein rCH 1.086 ±0.007 1.083 -0.003 3 8
C4H10O Ethoxy ethane rCH 1.100   1.097 -0.003 2 6
CH3CH2SH ethanethiol rCH 1.092   1.089 -0.003 1 5
C2H5N Aziridine rCH 1.083   1.081 -0.002 3 5
C3H6 Cyclopropane rCH 1.083   1.081 -0.002 1 4
CH3OCHO methyl formate rCH 1.086   1.084 -0.002 1 5
C3H8O2 Methane, dimethoxy- rCO 1.432   1.430 -0.002 4 6
C4H6 Cyclobutene rCC 1.517   1.515 -0.002 1 3
C5H5N Pyridine rC:C 1.400   1.398 -0.002 2 5
C4H10O Methyl propyl ether rCO 1.413   1.411 -0.002 1 9
C4H8 cyclobutane rCH 1.093   1.091 -0.002 1 5
CH3CH2CHO Propanal rCC 1.523   1.521 -0.002 1 2
C4H10O Methyl propyl ether rCH 1.099   1.097 -0.002 1 2
CH2CHF Ethene, fluoro- rCH 1.082   1.080 -0.002 1 4
C3H4O Methylketene rCH 1.083   1.081 -0.002 2 5
C2H5F fluoroethane rCH 1.090 ±0.007 1.088 -0.002 2 7
HO2 Hydroperoxy radical rOO 1.331   1.329 -0.002 1 2
NH Imidogen rNH 1.036   1.034 -0.002 1 2
C4H10O Methyl propyl ether rCH 1.094   1.092 -0.002 13 14
CH2FCl fluorochloromethane rCCl 1.762 ±0.000 1.760 -0.002 1 3
AlH aluminum monohydride rAlH 1.648   1.646 -0.002 1 2
C4H10O Ethoxy ethane rCH 1.092   1.090 -0.002 4 10
C3H4 cyclopropene rCH 1.088   1.087 -0.001 1 6
CSe2 Carbon diselenide rC=Se 1.692 ±0.000 1.691 -0.001 1 2
C4H10O Ethoxy ethane rCH 1.090   1.089 -0.001 4 12
C2H5N Aziridine rCH 1.084   1.083 -0.001 3 6
CH2NN diazomethane rHC 1.075   1.074 -0.001 1 4
C5H10 2-Pentene, (Z)- rCH 1.092   1.091 -0.001 1 2
CH2CHCHO Acrolein rCH 1.084 ±0.005 1.083 -0.001 2 6
C4H8 cyclobutane rCH 1.091   1.090 -0.001 1 6
C5H8 Ethenylcyclopropane rCC 1.475   1.474 -0.001 1 2
CH3CH2SH ethanethiol rCH 1.090   1.089 -0.001 2 7
CH3CH(CH3)CH3 Isobutane rCH 1.092   1.091 -0.001 3 9
CH4 Methane rCH 1.087 ±0.001 1.086 -0.001 1 2
C4H10O Methyl propyl ether rCH 1.091   1.090 -0.001 5 8
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.090   1.089 -0.001 9 11
C4H10O Methyl propyl ether rCC 1.516   1.515 -0.001 10 13
HClO4 perchloric acid rHO 0.980   0.979 -0.001 3 6
C2H5F fluoroethane rCH 1.091 ±0.007 1.091 -0.000 2 6
C4H6 Cyclobutene rCH 1.083   1.083 -0.000 1 5
CBr4 Carbon tetrabromide rCBr 1.942 ±0.002 1.942 -0.000 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.528   1.528 -0.000 1 3
CH2CHCHO Acrolein rC=C 1.345 ±0.003 1.345 -0.000 2 3
C6H12 Cyclohexane rCH 1.093   1.093 -0.000 1 13
C4H10O Propane, 2-methoxy- rCH 1.095   1.095 -0.000 1 2
C8H8 cyclooctatetraene rCC 1.470 ±0.001 1.470 -0.000 1 5
C3H4O Cyclopropanone rCC 1.575   1.575 0.000 3 4
C6H5OH phenol rC:C 1.398   1.398 0.000 1 2
BeCl beryllium monochloride rBeCl 1.797   1.797 0.000 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.089   1.089 0.000 9 10
C4H4N2 1,3-Diazine rCH 1.079   1.079 0.000 3 9
C6H5OH phenol rCH 1.082   1.082 0.000 4 11
CH3CH2Cl Ethyl chloride rCH 1.090   1.091 0.000 1 3
CSe Carbon monoselenide rC=Se 1.676 ±0.000 1.677 0.001 1 2
AlO Aluminum monoxide rAlO 1.618   1.618 0.001 1 2
CH3NC methyl isocyanide rCN 1.426 ±0.003 1.427 0.001 1 2
C2H2 Acetylene rCH 1.063   1.064 0.001 1 3
CH3CHO Acetaldehyde rCH 1.086   1.087 0.001 2 5
CCl2 dichloromethylene rCCl 1.711   1.712 0.001 1 2
CH2CHCl Ethene, chloro- rCH 1.079   1.080 0.001 2 5
CH3CH2Cl Ethyl chloride rCH 1.086   1.087 0.001 2 7
C6H5OH phenol rCH 1.084   1.085 0.001 2 9
BeH2 beryllium dihydride rHBe 1.326 ±0.000 1.328 0.001 1 2
CH2CHCHO Acrolein rCC 1.470 ±0.003 1.471 0.001 1 2
CHClCCl2 Trichloroethylene rCCl 1.712   1.713 0.001 2 6
CH3OCH3 Dimethyl ether rCH 1.085 ±0.001 1.086 0.001 2 4
CH3CHS Thioacetaldehyde rCH 1.089   1.090 0.001 1 4
CH3Br methyl bromide rCH 1.082 ±0.001 1.084 0.001 1 3
C3H7SH 1-Propanethiol rCH 1.092   1.094 0.002 5 7
CH2CHF Ethene, fluoro- rCH 1.077   1.079 0.002 2 5
C4H4N2 Succinonitrile rCC 1.465   1.467 0.002 1 3
CH3ONO Methyl nitrite rNO 1.398   1.400 0.002 2 6
C2H3N3 1H-1,2,4-Triazole rC=N 1.329   1.331 0.002 1 7
CH3NH2 methyl amine rCH 1.093 ±0.000 1.095 0.002 1 3
C2H3 vinyl rCH 1.085   1.087 0.002 2 4
CH3CH2OH Ethanol rCH 1.088   1.090 0.002 1 5
CHF2Cl difluorochloromethane rCCl 1.747 ±0.010 1.749 0.002 1 3
CH3NHCH3 Dimethylamine rCH 1.098   1.100 0.002 3 5
C5H10 Cyclopropane, 1,1-dimethyl- rCH 1.080   1.082 0.002 2 6
C3H4 cyclopropene rCH 1.072   1.075 0.003 2 4
C2H5F fluoroethane rCC 1.505 ±0.007 1.508 0.003 1 2
HCCCN Cyanoacetylene rCH 1.062 ±0.001 1.065 0.003 4 5
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804   1.807 0.003 8 9
CH2CCHCH3 1,2-Butadiene rC=C 1.314   1.317 0.003 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCH 1.087   1.090 0.003 1 2
C5H8 1,3-Butadiene, 2-methyl- rCC 1.463   1.466 0.003 2 3
CH3CCH propyne rCH 1.060   1.063 0.003 3 4
DO Hydroxyl-d rDO 0.970   0.973 0.004 1 2
CH3OCl methyl hypochlorite rHC 1.086 ±0.018 1.090 0.004 3 5
OH Hydroxyl radical rOH 0.970   0.973 0.004 1 2
C4H10O Propane, 2-methoxy- rCO 1.422   1.426 0.004 5 14
C3H6 Cyclopropane rCC 1.501   1.505 0.004 1 2
CHClCCl2 Trichloroethylene rCCl 1.720   1.724 0.004 2 5
CuCl Copper monochloride rCuCl 2.051 ±0.000 2.056 0.004 1 2
CCl2O Phosgene rCCl 1.737   1.741 0.005 2 3
MgH magnesium monohydride rMgH 1.730   1.734 0.005 1 2
C4H6O Cyclobutanone rCC 1.527   1.532 0.005 2 3
C4H5N (E)-2-Butenenitrile rCC 1.432   1.437 0.005 8 10
CH3NHCH3 Dimethylamine rCH 1.084   1.089 0.005 3 9
BS boron sulfide rBS 1.609   1.614 0.005 1 2
PO Phosphorus monoxide rP=O 1.476   1.481 0.005 1 2
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCO 1.416   1.421 0.005 1 5
H2O Water rOH 0.958 ±0.000 0.963 0.005 1 2
OH- hydroxide anion rOH 0.964   0.970 0.006 1 2
C5H8O 2H-Pyran, 3,4-dihydro- rCC 1.516   1.522 0.006 10 13
C3H4O Methylketene rCH 1.083   1.089 0.006 3 6
N2O3 Dinitrogen trioxide rN=O 1.217   1.223 0.006 2 5
H2CS Thioformaldehyde rC=S 1.611   1.617 0.006 1 2
HO2 Hydroperoxy radical rOH 0.971   0.977 0.006 1 3
CCl carbon monochloride rCCl 1.649   1.656 0.007 1 2
C4H10O Methyl propyl ether rCO 1.408   1.415 0.007 9 10
C6H5OH phenol rCH 1.076   1.083 0.007 3 10
C3H7SH 1-Propanethiol rCH 1.090   1.097 0.007 8 10
C3H7N Cyclopropylamine rCH 1.080   1.087 0.007 1 2
C4H6 Bicyclo[1.1.0]butane rCC 1.497   1.505 0.008 1 2
C8H8 cyclooctatetraene rCH 1.079 ±0.001 1.087 0.008 1 9
ClCN chlorocyanogen rCCl 1.629   1.637 0.008 1 2
CS carbon monosulfide rC#S 1.535   1.543 0.008 1 2
ClO Monochlorine monoxide rClO 1.596 ±0.001 1.604 0.008 1 2
C2H6O2S Dimethyl sulfone rCS 1.777 ±0.006 1.785 0.008 1 4
CH3OCH3 Dimethyl ether rCO 1.411 ±0.001 1.419 0.008 1 2
CH3CH2OH Ethanol rCH 1.086   1.094 0.008 2 8
CH3ONO Methyl nitrite rCO 1.437   1.446 0.009 1 2
TiCl Titanium Monochloride rClTi 2.265 ±0.000 2.273 0.009 1 2
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804   1.813 0.009 5 8
DF Hydrofluoric acid-d rDF 0.917 ±0.000 0.927 0.009 1 2
C5H10 2-Pentene, (Z)- rCC 1.490   1.499 0.009 8 14
C4H6 Methylenecyclopropane rCC 1.457   1.467 0.010 2 5
SiH3Cl chlorosilane rSiCl 2.051   2.060 0.010 1 2
CHF2Cl difluorochloromethane rCF 1.350 ±0.010 1.360 0.010 1 4
CH3OCHO methyl formate rCO 1.437   1.447 0.010 1 2
C5H8 Spiropentane rCC 1.470   1.480 0.010 1 2
HF Hydrogen fluoride rHF 0.917 ±0.000 0.927 0.010 1 2
C5H5N Pyridine rC:C 1.390   1.400 0.010 3 5
HNO3 Nitric acid rNO 1.406   1.416 0.010 1 2
AlCl Aluminum monochloride rAlCl 2.130 ±0.000 2.140 0.010 1 2
MgO magnesium oxide rMgO 1.749   1.759 0.010 1 2
MgH+ magnesium monohydride cation rHMg 1.652   1.662 0.011 1 2
B2 Boron diatomic rBB 1.590   1.601 0.011 1 2
C4H10O Methyl propyl ether rCH 1.086   1.097 0.011 1 4
Si(CH3)4 tetramethylsilane rSiC 1.875 ±0.002 1.886 0.011 1 2
CH2NN diazomethane rN=N 1.139   1.150 0.011 2 3
CH2Br2 dibromomethane rCBr 1.925 ±0.002 1.936 0.011 1 4
CH2CHCHO Acrolein rC=O 1.219 ±0.005 1.231 0.012 1 4
CHBr3 bromoform rCBr 1.924 ±0.005 1.936 0.012 1 3
NH2CONH2 Urea rNH 0.998   1.009 0.012 4 8
SiH2Cl2 dichlorosilane rSiCl 2.033 ±0.003 2.045 0.012 1 4
C6H8 (Z)-hexa-1,3,5-triene rC=C 1.337   1.349 0.012 3 5
HOBr Hypobromous acid rOH 0.961   0.974 0.013 1 2
BeS beryllium sulfide rBe=S 1.742   1.754 0.013 1 2
CH3Br methyl bromide rCBr 1.934 ±0.000 1.947 0.013 1 2
HNCNH diiminomethane rC=N 1.224 ±0.001 1.237 0.013 1 2
C2HF3 Trifluoroethylene rCF 1.316 ±0.011 1.329 0.013 1 3
FNO2 Nitryl fluoride rN=O 1.180 ±0.005 1.193 0.013 1 3
GaAs Gallium arsenide rGa#As 2.530 ±0.020 2.544 0.014 1 2
SiCl Clorosilylidyne rSiCl 2.061 ±0.000 2.075 0.014 1 2
SiHCl3 Trichlorosilane rSiCl 2.020   2.034 0.014 1 3
CH2O2 Dioxirane rCO 1.388 ±0.004 1.402 0.014 1 4
C8H8 cyclooctatetraene rC=C 1.337 ±0.001 1.351 0.014 1 2
CH3OCHO methyl formate rCO 1.334   1.348 0.014 2 3
C4H10O Ethoxy ethane rCO 1.411   1.425 0.014 1 2
CH3CH(NH2)COOH Alanine rCC 1.509   1.524 0.015 2 3
C6H5OH phenol rCO 1.364   1.379 0.015 1 7
CuF Copper monofluoride rCuF 1.745 ±0.000 1.760 0.015 1 2
C4H4N2 1,3-Diazine rC:N 1.328   1.343 0.015 2 6
C2H3N3 1H-1,2,4-Triazole rCN 1.348   1.363 0.015 1 2
N(CH3)3 Trimethylamine rCH 1.088   1.103 0.015 2 5
CH2FCl fluorochloromethane rCF 1.370 ±0.001 1.385 0.015 1 2
C3H5 Allyl radical rCH 1.069   1.084 0.015 1 2
SiS silicon monosulfide rSiS 1.929 ±0.000 1.945 0.015 1 2
BO boron monoxide rB=O 1.205   1.220 0.016 1 2
CH2NN diazomethane rC=N 1.300   1.316 0.016 1 2
C2H Ethynyl radical rCH 1.047   1.062 0.016 1 3
C3H3NO Oxazole rCO 1.357   1.373 0.016 1 5
CH3NO3 Methyl nitrate rNO 1.402   1.418 0.016 1 4
C2H5F fluoroethane rCF 1.398 ±0.007 1.415 0.017 1 3
As4 Arsenic tetramer rAsAs 2.435   2.452 0.017 1 2
GeCl Germanium monochloride rCl-Ge 2.164 ±0.000 2.181 0.017 1 2
CH3COCl Acetyl Chloride rC=O 1.187   1.204 0.017 1 3
MgS magnesium sulfide rMgS 2.143   2.160 0.018 1 2
PCl5 Phosphorus pentachloride rPCl 2.124   2.142 0.018 1 5
C4H4N2 Pyridazine rCH 1.064   1.082 0.018 1 5
C2H2 Acetylene rC#C 1.203   1.221 0.018 1 2
PCl5 Phosphorus pentachloride rPCl 2.020   2.039 0.019 1 2
CH2CO Ketene rC=O 1.162   1.181 0.019 2 3
BF3 Borane, trifluoro- rBF 1.307   1.327 0.020 1 2
C5H10 2-Pentene, (E)- rCC 1.484   1.504 0.020 4 11
BF Boron monofluoride rBF 1.267 ±0.000 1.287 0.020 1 2
CF Fluoromethylidyne rCF 1.276   1.297 0.020 1 2
HNCO Isocyanic acid rC=O 1.164   1.184 0.020 3 4
CF3COOH trifluoroacetic acid rC=O 1.192 ±0.003 1.213 0.021 2 4
NaH sodium hydride rNaH 1.887 ±0.000 1.908 0.021 1 2
CCl2O Phosgene rC=O 1.177   1.198 0.021 1 2
MgOH magnesium hydroxide rOH 0.940   0.961 0.021 1 3
F2 Fluorine diatomic rFF 1.412   1.434 0.022 1 2
OCSe Carbonyl selenide rC=O 1.159   1.180 0.022 1 2
CH3NC methyl isocyanide rC#N 1.166 ±0.003 1.188 0.022 2 3
N2O3 Dinitrogen trioxide rN=O 1.202   1.224 0.022 2 4
SOCl2 thionyl chloride rS=O 1.443 ±0.006 1.465 0.022 1 2
CH2O2 Dioxirane rOO 1.516 ±0.003 1.538 0.022 4 5
CFCl3 Trichloromonofluoromethane rCF 1.345   1.368 0.023 1 2
CO Carbon monoxide rC#O 1.128 ±0.000 1.151 0.023 1 2
PCl phosphorus chloride rPCl 2.018   2.041 0.023 1 2
NF nitrogen fluoride rNF 1.317   1.340 0.023 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.507   1.531 0.024 1 2
C2 Carbon diatomic rC=C 1.243   1.267 0.025 1 2
AlC Aluminum carbide rC=Al 1.955   1.980 0.025 1 2
CN- cyanide anion rC#N 1.177 ±0.004 1.202 0.025 1 2
ClCN chlorocyanogen rC#N 1.161   1.185 0.025 2 3
F2O Difluorine monoxide rFO 1.405   1.431 0.026 1 2
MgCl magnesium monochloride rMgCl 2.199   2.225 0.026 1 2
C3H8O2 Methane, dimethoxy- rCO 1.382   1.408 0.026 1 4
CH2C(CH3)OCH3 1-Propene, 2-methoxy- rCO 1.353   1.379 0.026 5 10
BrO Bromine monoxide rOBr 1.718   1.745 0.027 1 2
CaOH Calcium monohydroxide rHO 0.930 ±0.007 0.958 0.028 2 3
CH3ONO Methyl nitrite rN=O 1.182   1.210 0.028 6 7
LiH Lithium Hydride rLiH 1.595 ±0.000 1.623 0.028 1 2
SCl sulfur monochloride rSCl 1.975   2.004 0.028 1 2
HOBr Hypobromous acid rBrO 1.834   1.863 0.029 2 3
N2O3 Dinitrogen trioxide rN=O 1.142   1.171 0.029 1 3
HClO4 perchloric acid rO=Cl 1.414 ±0.001 1.443 0.029 1 2
C5H10 2-Pentene, (Z)- rCH 1.058   1.087 0.029 12 13
BrCl Bromine monochloride rClBr 2.136 ±0.000 2.166 0.030 1 2
C3O2 Carbon suboxide rC=C 1.251   1.281 0.030 1 2
PO2 Phosphorus dioxide rP=O 1.467   1.496 0.030 1 2
PF5 Phosphorus pentafluoride rFP 1.577   1.607 0.030 1 5
Cl2 Chlorine diatomic rClCl 1.988   2.018 0.030 1 2
HOCl hypochlorous acid rClO 1.691   1.721 0.031 1 3
Cu2 Copper dimer rCuCu 2.220   2.251 0.031 1 2
S2 Sulfur diatomic rS=S 1.889   1.922 0.033 1 2
BeO beryllium oxide rBe=O 1.331   1.364 0.033 1 2
N2 Nitrogen diatomic rN#N 1.098   1.131 0.033 1 2
C2Cl2 dichloroacetylene rCCl 1.612 ±0.030 1.645 0.033 1 3
Br2 Bromine diatomic rBrBr 2.281   2.314 0.033 1 2
AsF Arsenic monofluoride rFAs 1.736 ±0.001 1.770 0.034 1 2
SSO Disulfur monoxide rS=S 1.884   1.919 0.035 2 3
Se2 Selenium diatomic rSe=Se 2.166 ±0.001 2.201 0.035 1 2
F2SO Thionyl Fluoride rO=S 1.413 ±0.000 1.448 0.035 1 2
BeF Beryllium monofluoride rBeF 1.361   1.397 0.036 1 2
C2H3N3 1H-1,2,4-Triazole rC=N 1.305   1.341 0.036 2 4
BrF Bromine monofluoride rFBr 1.759 ±0.000 1.796 0.037 1 2
SeO2 Selenium dioxide rSeO 1.607 ±0.001 1.644 0.037 1 2
PO- phosphorus monoxide anion rOP 1.540   1.577 0.037 1 2
SiF4 Silicon tetrafluoride rSiF 1.554   1.592 0.038 1 2
NO+ nitric oxide cation rN=O 1.066   1.103 0.038 1 2
BrF5 bromine pentafluoride rFBr 1.774 ±0.003 1.812 0.038 1 3
SiO Silicon monoxide rSiO 1.510 ±0.000 1.548 0.038 1 2
C3O2 Carbon suboxide rC=O 1.146   1.184 0.038 2 4
Cl2+ chlorine diatomic cation rClCl 1.892   1.930 0.039 1 2
O2 Oxygen diatomic rO=O 1.208   1.246 0.039 1 2
BrF3 Bromine trifluoride rFBr 1.810 ±0.000 1.849 0.039 1 3
PF5 Phosphorus pentafluoride rPF 1.534   1.573 0.039 1 2
LiOH lithium hydroxide rLiO 1.582   1.621 0.039 1 2
LiCl lithium chloride rLiCl 2.021 ±0.000 2.061 0.041 1 2
P2 Phosphorus diatomic rP#P 1.893   1.934 0.041 1 2
NS+ nitrogen sulfide cation rNS 1.440   1.481 0.041 1 2
BrF3 Bromine trifluoride rFBr 1.721   1.762 0.041 1 2
SiH3F monofluorosilane rSiF 1.595   1.636 0.041 1 2
ClF Chlorine monofluoride rFCl 1.628 ±0.000 1.670 0.041 1 2
SF4 Sulfur tetrafluoride rSF 1.646 ±0.003 1.688 0.042 1 2
SO Sulfur monoxide rS=O 1.481   1.523 0.042 1 2
C2H6O2S Dimethyl sulfone rS=O 1.431 ±0.004 1.474 0.043 1 2
NaCl Sodium Chloride rNaCl 2.361 ±0.000 2.404 0.043 1 2
NaBr Sodium Bromide rNaBr 2.502 ±0.000 2.546 0.044 1 2
SOF4 Sulfur tetrafluoride oxide rF-S 1.596 ±0.003 1.641 0.045 1 3
PN Phosphorus mononitride rP#N 1.491   1.536 0.045 1 2
AlF Aluminum monofluoride rAlF 1.654 ±0.000 1.699 0.045 1 2
LiF lithium fluoride rLiF 1.564 ±0.000 1.609 0.045 1 2
ClFO3 Perchloryl fluoride rCl=O 1.400   1.445 0.045 2 3
S2+ sulfur dimer cation rS=S 1.825 ±0.010 1.871 0.046 1 2
MgF Magnesium monofluoride rMgF 1.750   1.796 0.046 1 2
SiF silicon monofluoride rSiF 1.604   1.651 0.046 1 2
PF+ phosphorus monofluoride cation rFP 1.500   1.547 0.047 1 2
SiF2 Silicon difluoride rFSi 1.590 ±0.000 1.637 0.047 1 2
SF4 Sulfur tetrafluoride rSF 1.545 ±0.003 1.592 0.047 1 4
AlN Aluminum nitride rN#Al 1.786   1.836 0.050 1 2
PF phosphorus monofluoride rFP 1.593   1.642 0.050 1 2
HClO4 perchloric acid rO=Cl 1.404 ±0.001 1.454 0.050 1 4
GaF Gallium monofluoride rFGa 1.774 ±0.000 1.825 0.051 1 2
LiBr Lithium Bromide rLiBr 2.170 ±0.000 2.223 0.053 1 2
SSO Disulfur monoxide rS=O 1.456   1.509 0.053 1 2
BrF5 bromine pentafluoride rFBr 1.689 ±0.008 1.742 0.053 1 2
KH Potassium hydride rHK 2.243 ±0.001 2.296 0.054 1 2
As2 Arsenic diatomic rAs#As 2.103   2.157 0.054 1 2
SOF4 Sulfur tetrafluoride oxide rF-S 1.539 ±0.003 1.593 0.054 1 5
SO+ sulfur monoxide cation rO=S 1.424   1.481 0.057 1 2
NaF sodium fluoride rNaF 1.926 ±0.000 1.983 0.057 1 2
GeF+ Germanium monofluoride cation rFGe 1.665 ±0.000 1.723 0.058 1 2
GeF Germanium monofluoride rF-Ge 1.745   1.807 0.062 1 2
F2SO Thionyl Fluoride rFS 1.585 ±0.000 1.647 0.062 1 3
HClO4 perchloric acid rOCl 1.641 ±0.002 1.705 0.064 1 3
ClOF3 Chlorine trifluoride oxide rFCl 1.713 ±0.003 1.783 0.070 1 4
O2+ diatomic oxygen cation rOO 1.116   1.187 0.071 1 2
SF Monosulfur monofluoride rSF 1.599   1.673 0.074 1 2
MgOH magnesium hydroxide rMgO 1.767   1.845 0.078 1 2
FNO2 Nitryl fluoride rNF 1.467 ±0.015 1.548 0.081 1 2
KBr Potassium Bromide rKBr 2.821 ±0.000 2.906 0.085 1 2
NaLi lithium sodium rLiNa 2.889   2.982 0.093 1 2
ClOF3 Chlorine trifluoride oxide rFCl 1.603 ±0.004 1.698 0.095 1 3
KCl Potassium Chloride rKCl 2.667 ±0.000 2.762 0.095 1 2
KF Potassium Fluoride rKF 2.171 ±0.000 2.273 0.101 1 2
CaH Calcium monohydride rHCa 2.003 ±0.000 2.111 0.109 1 2
Li2 Lithium diatomic rLiLi 2.673   2.787 0.114 1 2
ClFO3 Perchloryl fluoride rFCl 1.598   1.716 0.118 1 2
CaF Calcium monofluoride rFCa 1.967 ±0.001 2.102 0.135 1 2
CaCl calcium monochloride rClCa 2.437   2.572 0.135 1 2
CaOH Calcium monohydroxide rOCa 1.976 ±0.004 2.119 0.143 1 2
FO Oxygen monofluoride rFO 1.354   1.510 0.156 1 2
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 ±0.040 2.264 0.224 1 3
C3H3NO Oxazole rCH 1.075   1.392 0.317 3 4
CH3OC2H5 Ethane, methoxy- rCH 1.087   1.420 0.333 1 2
468 molecules.