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Release 22May 2022
NIST Standard Reference Database 101
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IV.D.8.

Average Bond Length Differences by Model Chemistry

Calculated at B2PLYP=FULLultrafine/6-311+G(3df,2p)

Species Name Bond type Bond Length (Å)
Experimental unc. Calculated Difference atom1 atom2
C4H10O Methyl propyl ether rCC 1.530   1.090 -0.440 5 13
SiP Silicon monophosphide rSiP 2.078 ±0.002 1.985 -0.092 1 2
NSe Nitrogen monoselenide rN=Se 1.652   1.610 -0.042 1 2
ClO Monochlorine monoxide rClO 1.596 ±0.001 1.566 -0.030 1 2
C2H2O2 Ethanedial rCH 1.132   1.103 -0.029 1 3
CH3CH2CH2CH3 Butane rCH 1.117   1.093 -0.024 1 5
C3F6 hexafluoropropene rCF 1.329 ±0.003 1.307 -0.022 1 4
C4H8O2 Ethyl acetate rCH 1.105   1.084 -0.021 1 7
C5H6 Propellane rCC 1.596 ±0.005 1.576 -0.020 2 5
LiOH lithium hydroxide rOH 0.969   0.949 -0.020 1 3
B2H6 Diborane rBH 1.200   1.183 -0.017 1 5
CH3CH2CHO Propanal rCH 1.103   1.087 -0.016 1 6
H2Cl+ dihydrogen monochloride cation rHCl 1.321 ±0.000 1.306 -0.015 1 2
F2 Fluorine diatomic rFF 1.412   1.399 -0.013 1 2
CH2NH Methanimine rCH 1.103   1.091 -0.012 1 3
CaC Calcium monocarbide rC#Ca 2.302   2.290 -0.012 1 2
HS+ sulfur monohydride cation rSH 1.374   1.363 -0.012 1 2
C8H8 cubane rCH 1.097   1.086 -0.011 1 9
B2H6 Diborane rBH 1.320   1.309 -0.011 1 3
CH3CH2CHO Propanal rCH 1.105   1.095 -0.010 2 8
C5H6 Propellane rCC 1.525 ±0.002 1.515 -0.010 1 2
HF+ hydrogen fluoride cation rHF 1.014   1.005 -0.010 1 2
CH3NH2 methyl amine rCN 1.471 ±0.003 1.461 -0.010 1 2
AsH Arsenic monohydride rAsH 1.535 ±0.001 1.525 -0.010 1 2
HSe Selenium monohydride rSeH 1.475 ±0.010 1.466 -0.009 1 2
CH3CH2CHO Propanal rCH 1.096   1.088 -0.008 1 5
HOCl hypochlorous acid rOH 0.973 ±0.002 0.965 -0.008 1 2
CH3CH2CHO Propanal rCH 1.115   1.107 -0.008 3 10
C2H2+ acetylene cation rC=C 1.253 ±0.001 1.245 -0.007 1 2
CH3CCH propyne rCH 1.096   1.089 -0.007 1 5
HeH+ Helium hydride cation rHHe 0.790   0.783 -0.007 1 2
H2CSe Selenoformaldehyde rHC 1.090   1.083 -0.007 1 3
CH3NH2 methyl amine rNH 1.018 ±0.001 1.011 -0.007 2 6
CH3CHO Acetaldehyde rCH 1.114   1.107 -0.007 1 4
ArH+ Argon hydride cation rArH 1.292 ±0.000 1.285 -0.007 1 2
C2H2O2 Ethanedial rCC 1.526   1.519 -0.007 1 2
HSiCl Chlorosilylene rSiH 1.525 ±0.005 1.518 -0.007 1 3
CH2CO Ketene rCH 1.083   1.076 -0.006 1 4
CH3CH2CHO Propanal rCC 1.509   1.503 -0.006 2 3
CH3CHS Thioacetaldehyde rCH 1.098   1.092 -0.006 2 6
C4H8O2 Ethyl acetate rCC 1.515   1.509 -0.006 5 6
CH3CHFCH3 2-Fluoropropane rCH 1.093 ±0.006 1.088 -0.005 4 8
C4H8O2 Ethyl acetate rCC 1.508   1.503 -0.005 1 2
CH2CHCH2CH3 1-Butene rCC 1.536   1.531 -0.005 1 2
CH3CHFCH3 2-Fluoropropane rCH 1.094 ±0.005 1.089 -0.005 4 10
CH3CH2CH2CH3 Butane rCC 1.531   1.526 -0.005 1 2
CF Fluoromethylidyne rCF 1.276   1.271 -0.005 1 2
N3 azide radical rNN 1.181   1.176 -0.005 1 2
CHF3 Methane, trifluoro- rCH 1.091 ±0.014 1.086 -0.005 1 2
CH3CHS Thioacetaldehyde rCH 1.090   1.085 -0.005 2 5
SiH3F monofluorosilane rSiH 1.476   1.471 -0.005 1 3
C3H8 Propane rCH 1.096   1.092 -0.004 1 4
C2H2ClF 1-chloro-1-fluoroethylene rCH 1.082 ±0.001 1.078 -0.004 2 5
KH Potassium hydride rKH 2.243 ±0.001 2.238 -0.004 1 2
CH3OCH3 Dimethyl ether rCH 1.099 ±0.001 1.095 -0.004 2 6
SiH4 Silane rSiH 1.480 ±0.000 1.476 -0.004 1 2
SiH3Cl chlorosilane rSiH 1.475   1.471 -0.004 1 3
C3H6 Cyclopropane rCH 1.083   1.079 -0.004 1 4
CH2Cl2 Methylene chloride rCH 1.085 ±0.002 1.081 -0.004 1 2
CH3CH2CHO Propanal rCC 1.523   1.519 -0.004 1 2
CH3CHClCH3 Propane, 2-chloro- rCH 1.091   1.087 -0.004 2 5
BrO Bromine monoxide rOBr 1.718   1.714 -0.003 1 2
CH3OCH3 Dimethyl ether rCO 1.411 ±0.001 1.408 -0.003 1 2
LiNH2 lithium amide rLiN 1.736 ±0.003 1.733 -0.003 1 2
CH Methylidyne rCH 1.120   1.117 -0.003 1 2
HNCNH diiminomethane rC=N 1.224 ±0.001 1.221 -0.003 1 2
H2CS Thioformaldehyde rC=S 1.611   1.608 -0.003 1 2
HOCl hypochlorous acid rClO 1.697 ±0.001 1.695 -0.003 1 3
NO Nitric oxide rN=O 1.154 ±0.000 1.151 -0.003 1 2
CH2CHF Ethene, fluoro- rCH 1.082   1.079 -0.003 1 4
C2H2 Acetylene rCH 1.063   1.061 -0.002 1 3
C3H4 cyclopropene rCH 1.088   1.086 -0.002 1 6
OCSe Carbonyl selenide rC=O 1.159   1.157 -0.002 1 2
CH3CHClCH3 Propane, 2-chloro- rCH 1.092   1.091 -0.001 3 6
PH phosphorus monohydride rPH 1.422   1.421 -0.001 1 2
C2H2 Acetylene rC#C 1.203   1.201 -0.001 1 2
C3F6 hexafluoropropene rC=C 1.329 ±0.003 1.328 -0.001 1 2
H2CSe Selenoformaldehyde rC=Se 1.753   1.752 -0.001 1 2
CH4 Methane rCH 1.087 ±0.001 1.086 -0.001 1 2
CO+ carbon monoxide cation rC=O 1.115 ±0.000 1.114 -0.001 1 2
NCl nitrogen monochloride rNCl 1.611 ±0.000 1.610 -0.001 1 2
HS- mercapto anion rSH 1.343   1.342 -0.001 1 2
NO+ nitric oxide cation rN=O 1.066   1.065 -0.001 1 2
NaLi lithium sodium rLiNa 2.889   2.888 -0.001 1 2
CH2CO Ketene rC=O 1.162   1.161 -0.001 2 3
CH3CHO Acetaldehyde rCH 1.086   1.085 -0.001 2 5
CH3CHFCH3 2-Fluoropropane rCH 1.092   1.091 -0.001 1 3
CH3Br methyl bromide rCH 1.082 ±0.001 1.082 0.000 1 3
CN Cyano radical rC#N 1.172   1.172 0.000 1 2
CH3CSNH2 Ethanethioamide rC=S 1.647 ±0.002 1.647 0.000 1 2
C2H2+ acetylene cation rCH 1.077 ±0.005 1.077 0.000 1 3
CH3CCH propyne rCH 1.060   1.060 0.000 3 4
OH Hydroxyl radical rOH 0.970   0.970 0.000 1 2
CO Carbon monoxide rC#O 1.128 ±0.000 1.129 0.000 1 2
BO boron monoxide rB=O 1.205   1.205 0.000 1 2
SCSe Carbon sulfide selenide rC=S 1.553 ±0.002 1.554 0.001 1 2
CH3CHS Thioacetaldehyde rCH 1.089   1.090 0.001 1 4
LiCl lithium chloride rLiCl 2.021 ±0.000 2.021 0.001 1 2
C3H4 cyclopropene rCH 1.072   1.073 0.001 2 4
HNO3 Nitric acid rNO 1.406   1.407 0.001 1 2
CH3OCH3 Dimethyl ether rCH 1.085 ±0.001 1.086 0.001 2 4
N2 Nitrogen diatomic rN#N 1.098   1.099 0.001 1 2
H2O Water rOH 0.958 ±0.000 0.959 0.001 1 2
CH2CHF Ethene, fluoro- rCH 1.077   1.078 0.001 2 5
C2H6O2S Dimethyl sulfone rCS 1.777 ±0.006 1.778 0.001 1 4
CH3CHFCH3 2-Fluoropropane rCH 1.088 ±0.006 1.089 0.001 4 6
HCl+ hydrogen chloride cation rHCl 1.315   1.316 0.001 1 2
HCl Hydrogen chloride rHCl 1.275 ±0.000 1.276 0.001 1 2
CH3NH2 methyl amine rCH 1.093 ±0.000 1.095 0.002 1 3
SiH2F2 difluorosilane rSiH 1.462   1.463 0.002 1 4
SiH3+ Silyl cation rSiH 1.460 ±0.010 1.462 0.002 1 2
SiH Silylidyne rSiH 1.520   1.522 0.002 1 2
C3H6 Cyclopropane rCC 1.501   1.503 0.002 1 2
C4H8O2 Ethyl acetate rCO 1.345   1.347 0.002 2 3
SeCl2 Selenium Dichloride rClSe 2.157 ±0.003 2.159 0.002 1 2
OCSe Carbonyl selenide rC=Se 1.709   1.711 0.002 1 3
HF Hydrogen fluoride rHF 0.917 ±0.000 0.919 0.002 1 2
LiOH lithium hydroxide rLiO 1.582   1.584 0.003 1 2
H2Se Hydrogen selenide rSeH 1.460   1.463 0.003 1 2
CH2F2 Methane, difluoro- rCH 1.084 ±0.003 1.087 0.003 1 2
C4H8O2 Ethyl acetate rC=O 1.203   1.206 0.003 2 4
CBr4 Carbon tetrabromide rCBr 1.942 ±0.002 1.945 0.003 1 2
O2 Oxygen diatomic rO=O 1.208   1.211 0.004 1 2
PS phosphorus sulfide rP=S 1.900   1.904 0.004 1 2
C2H3 vinyl rCH 1.085   1.089 0.004 2 4
CH2CHCH2CH3 1-Butene rCC 1.493   1.497 0.004 2 3
CH2Cl2 Methylene chloride rCCl 1.767 ±0.002 1.771 0.004 1 4
HBr+ hydrogen bromide cation rHBr 1.448   1.453 0.004 1 2
GeH germylidene rGeH 1.588   1.593 0.005 1 2
HBr hydrogen bromide rHBr 1.414 ±0.000 1.419 0.005 1 2
OPCl Phosphorus oxychloride rP=O 1.462 ±0.011 1.467 0.005 1 2
PN Phosphorus mononitride rP#N 1.491   1.496 0.005 1 2
AsH3 Arsine rAsH 1.511 ±0.000 1.516 0.005 1 2
SCSe Carbon sulfide selenide rC=Se 1.695 ±0.002 1.701 0.006 1 3
KrH+ Protonated Krypton rHKr 1.421 ±0.000 1.427 0.006 1 2
PF5 Phosphorus pentafluoride rFP 1.577   1.583 0.006 1 5
CHF3 Methane, trifluoro- rCF 1.328 ±0.003 1.334 0.006 1 3
MgH magnesium monohydride rMgH 1.730   1.736 0.006 1 2
CH2F2 Methane, difluoro- rCF 1.351 ±0.001 1.357 0.006 1 4
CSe Carbon monoselenide rC=Se 1.676 ±0.000 1.683 0.006 1 2
LiBr Lithium Bromide rLiBr 2.170 ±0.000 2.177 0.006 1 2
NO- nitric oxide anion rN=O 1.258 ±0.010 1.264 0.006 1 2
CrH Chromium hydride rHCr 1.655 ±0.001 1.662 0.007 1 2
SO+ sulfur monoxide cation rO=S 1.424   1.432 0.008 1 2
PO Phosphorus monoxide rP=O 1.476   1.484 0.008 1 2
SiH3Cl chlorosilane rSiCl 2.051   2.059 0.009 1 2
CH2Br2 dibromomethane rCBr 1.925 ±0.002 1.934 0.009 1 4
SiO Silicon monoxide rSiO 1.510 ±0.000 1.519 0.009 1 2
PF5 Phosphorus pentafluoride rPF 1.534   1.543 0.009 1 2
ClF Chlorine monofluoride rFCl 1.628 ±0.000 1.638 0.010 1 2
AlNC Aluminum isocyanide rAlN 1.855 ±0.005 1.865 0.010 1 2
SO Sulfur monoxide rS=O 1.481   1.491 0.010 1 2
SSO Disulfur monoxide rS=O 1.456   1.466 0.010 1 2
Cl2+ chlorine diatomic cation rClCl 1.892   1.902 0.010 1 2
LiF lithium fluoride rLiF 1.564 ±0.000 1.574 0.010 1 2
SiS silicon monosulfide rSiS 1.929 ±0.000 1.940 0.011 1 2
As4 Arsenic tetramer rAsAs 2.435   2.446 0.011 1 2
GeH3F monofluorogermane rGeH 1.515 ±0.000 1.526 0.011 1 3
BrCl Bromine monochloride rClBr 2.136 ±0.000 2.147 0.011 1 2
SF Monosulfur monofluoride rSF 1.599   1.611 0.011 1 2
C2H6O2S Dimethyl sulfone rS=O 1.431 ±0.004 1.442 0.011 1 2
CH3Br methyl bromide rCBr 1.934 ±0.000 1.946 0.012 1 2
S2 Sulfur diatomic rS=S 1.889   1.901 0.012 1 2
SSO Disulfur monoxide rS=S 1.884   1.896 0.012 2 3
SeO Selenium monoxide rSeO 1.639 ±0.001 1.652 0.012 1 2
SiCl Clorosilylidyne rSiCl 2.061 ±0.000 2.075 0.013 1 2
SeO2 Selenium dioxide rSeO 1.607 ±0.001 1.620 0.013 1 2
SiH3F monofluorosilane rSiF 1.595   1.608 0.014 1 2
SF4 Sulfur tetrafluoride rSF 1.545 ±0.003 1.560 0.015 1 4
Br2 Bromine diatomic rBrBr 2.281   2.296 0.015 1 2
PF2 Phosphorus difluoride rPF 1.579   1.594 0.015 1 2
BrF Bromine monofluoride rFBr 1.759 ±0.000 1.774 0.015 1 2
SF4 Sulfur tetrafluoride rSF 1.646 ±0.003 1.662 0.016 1 2
CaO Calcium monoxide rOCa 1.822   1.838 0.016 1 2
C3O2 Carbon suboxide rC=O 1.146   1.163 0.017 2 4
GeBr4 Germanium tetrabromide rGeBr 2.272 ±0.001 2.289 0.017 1 2
Se2 Selenium diatomic rSe=Se 2.166 ±0.001 2.183 0.017 1 2
OPCl Phosphorus oxychloride rPCl 2.059 ±0.004 2.076 0.018 1 3
GeO Germanium monoxide rOGe 1.625   1.642 0.018 1 2
GeCl Germanium monochloride rClGe 2.164 ±0.000 2.182 0.018 1 2
HSiCl Chlorosilylene rSiCl 2.067 ±0.003 2.085 0.018 1 2
SiBr+ Silicon monobromide cation rSiBr 2.095 ±0.000 2.116 0.020 1 2
CaBr Calcium monobromide rCaBr 2.594 ±0.000 2.615 0.021 1 2
SiF2 Silicon difluoride rFSi 1.590 ±0.000 1.611 0.021 1 2
C3O2 Carbon suboxide rC=C 1.251   1.272 0.021 1 2
AlF Aluminum monofluoride rAlF 1.654 ±0.000 1.677 0.023 1 2
GeH3F monofluorogermane rGeF 1.731 ±0.000 1.754 0.023 1 2
GeF Germanium monofluoride rFGe 1.745   1.770 0.025 1 2
AlBr Aluminum monobromide rAlBr 2.295   2.321 0.027 1 2
GaF Gallium monofluoride rFGa 1.774 ±0.000 1.801 0.027 1 2
CFCl chlorofluoromethylene rCCl 1.714   1.742 0.028 1 3
GaBr Gallium monobromide rGaBr 2.352 ±0.000 2.381 0.028 1 2
He2+ helium diatomic cation rHeHe 1.081 ±0.001 1.110 0.029 1 2
GaAs Gallium arsenide rGa#As 2.530 ±0.020 2.561 0.031 1 2
C4H8O2 Ethyl acetate rCO 1.448   1.509 0.061 5 6
C4H10O Methyl propyl ether rCH 1.099   1.407 0.308 1 2
196 molecules.