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Average Bond Length Differences by Model Chemistry

Calculated at B2PLYP/Def2TZVPP

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 1.987 -0.091 1 2
C2H2O2 Ethanedial rCH 1.132   1.103 -0.029 1 3
ClO Monochlorine monoxide rClO 1.596 ±0.001 1.571 -0.025 1 2
CH3CH2CH2CH3 Butane rCH 1.117   1.093 -0.024 1 5
C4H8O2 Ethyl acetate rCH 1.105   1.084 -0.021 1 7
LiOH lithium hydroxide rOH 0.969   0.949 -0.020 1 3
C3F6 hexafluoropropene rCF 1.329 ±0.003 1.310 -0.019 1 4
B2H6 Diborane rBH 1.200   1.184 -0.016 1 5
CH3CH2CHO Propanal rCH 1.103   1.088 -0.015 1 6
H2Cl+ dihydrogen monochloride cation rHCl 1.321 ±0.000 1.306 -0.014 1 2
CH2NH Methanimine rCH 1.103   1.091 -0.012 1 3
HS+ sulfur monohydride cation rSH 1.374   1.363 -0.012 1 2
C8H8 cubane rCH 1.097   1.085 -0.012 1 9
F2 Fluorine diatomic rFF 1.412   1.400 -0.012 1 2
CH3CH2CHO Propanal rCH 1.105   1.095 -0.010 2 8
B2H6 Diborane rBH 1.320   1.310 -0.010 1 3
CH3CH2OH Ethanol rCH 1.098   1.088 -0.010 1 6
CH3NH2 methyl amine rCN 1.471 ±0.003 1.462 -0.009 1 2
AsH Arsenic monohydride rAsH 1.535 ±0.001 1.526 -0.009 1 2
HSe Selenium monohydride rSeH 1.475 ±0.010 1.467 -0.008 1 2
HOCl hypochlorous acid rOH 0.973 ±0.002 0.965 -0.008 1 2
CH3CH2CHO Propanal rCH 1.096   1.088 -0.008 1 5
CH3CH2CHO Propanal rCH 1.115   1.107 -0.008 3 10
ArH+ Argon hydride cation rArH 1.292 ±0.000 1.284 -0.008 1 2
CH3NH2 methyl amine rNH 1.018 ±0.001 1.011 -0.007 2 6
H2CSe Selenoformaldehyde rHC 1.090   1.083 -0.007 1 3
HF+ hydrogen fluoride cation rHF 1.014   1.007 -0.007 1 2
CH3CHO Acetaldehyde rCH 1.114   1.107 -0.007 1 4
HeH+ Helium hydride cation rHHe 0.790   0.783 -0.007 1 2
CH3CCH propyne rCH 1.096   1.089 -0.007 1 5
HSiCl Chlorosilylene rSiH 1.525 ±0.005 1.519 -0.006 1 3
C2H2O2 Ethanedial rCC 1.526   1.520 -0.006 1 2
CH2CO Ketene rCH 1.083   1.076 -0.006 1 4
C2H2+ acetylene cation rC=C 1.253 ±0.001 1.246 -0.006 1 2
LiNH2 lithium amide rLiN 1.736 ±0.003 1.731 -0.005 1 2
CH3CHS Thioacetaldehyde rCH 1.098   1.093 -0.005 2 6
CHF3 Methane, trifluoro- rCH 1.091 ±0.014 1.086 -0.005 1 2
CH3CHFCH3 2-Fluoropropane rCH 1.093 ±0.006 1.088 -0.005 4 8
C4H8O2 Ethyl acetate rCC 1.515   1.510 -0.005 5 6
CH3CH2CHO Propanal rCC 1.509   1.504 -0.005 2 3
CH3CHFCH3 2-Fluoropropane rCH 1.094 ±0.005 1.089 -0.005 4 10
CH2CHCH2CH3 1-Butene rCC 1.536   1.531 -0.005 1 2
C4H8O2 Ethyl acetate rCC 1.508   1.503 -0.005 1 2
CH3CH2CH2CH3 Butane rCC 1.531   1.526 -0.005 1 2
C3H8 Propane rCH 1.096   1.092 -0.004 1 4
CH3CHS Thioacetaldehyde rCH 1.090   1.086 -0.004 2 5
CH3CHClCH3 Propane, 2-chloro- rCH 1.091   1.087 -0.004 2 5
C3H6 Cyclopropane rCH 1.083   1.079 -0.004 1 4
SiH4 Silane rSiH 1.480 ±0.000 1.476 -0.004 1 2
CH2Cl2 Methylene chloride rCH 1.085 ±0.002 1.081 -0.004 1 2
CH3OCH3 Dimethyl ether rCH 1.099 ±0.001 1.095 -0.004 2 6
HI+ Hydrogen iodide cation rHI 1.632 ±0.000 1.628 -0.004 1 2
SiH3F monofluorosilane rSiH 1.476   1.472 -0.004 1 3
NH2SH Thiohydroxylamine rSH 1.344 ±0.029 1.340 -0.004 2 3
SiH3Cl chlorosilane rSiH 1.475   1.471 -0.004 1 3
HI Hydrogen iodide rHI 1.609 ±0.000 1.606 -0.003 1 2
LiOH lithium hydroxide rLiO 1.582   1.579 -0.003 1 2
CH3CH2CHO Propanal rCC 1.523   1.520 -0.003 1 2
ICN Cyanogen iodide rCI 1.992 ±0.000 1.989 -0.003 1 2
HOI Hypoiodous acid rOH 0.967 ±0.008 0.964 -0.003 1 3
CH2CHF Ethene, fluoro- rCH 1.082   1.080 -0.002 1 4
C3H4 cyclopropene rCH 1.088   1.086 -0.002 1 6
CH3I methyl iodide rCH 1.084 ±0.003 1.082 -0.002 1 3
H2CS Thioformaldehyde rC=S 1.611   1.609 -0.002 1 2
HOI Hypoiodous acid rOI 1.994 ±0.000 1.992 -0.002 1 2
C2H2 Acetylene rCH 1.063   1.061 -0.002 1 3
CH Methylidyne rCH 1.120   1.118 -0.002 1 2
TeH Telluryl radical rHTe 1.656 ±0.000 1.654 -0.002 1 2
HNCNH diiminomethane rC=N 1.224 ±0.001 1.223 -0.002 1 2
NO Nitric oxide rN=O 1.154 ±0.000 1.152 -0.001 1 2
CH3OCH3 Dimethyl ether rCO 1.411 ±0.001 1.410 -0.001 1 2
H2Te Hydrogen Telluride rHTe 1.651 ±0.000 1.650 -0.001 1 2
C2H5I Ethyl iodide rHC 1.093   1.092 -0.001 2 6
CH3CHClCH3 Propane, 2-chloro- rCH 1.092   1.091 -0.001 3 6
CH3CHFCH3 2-Fluoropropane rCH 1.092   1.091 -0.001 1 3
IO Iodine monoxide rIO 1.868 ±0.004 1.867 -0.001 1 2
CH4 Methane rCH 1.087 ±0.001 1.086 -0.001 1 2
BF Boron monofluoride rBF 1.267 ±0.000 1.266 -0.001 1 2
CF Fluoromethylidyne rCF 1.276   1.276 -0.000 1 2
C3F6 hexafluoropropene rC=C 1.329 ±0.003 1.329 0.000 1 2
OCSe Carbonyl selenide rC=O 1.159   1.158 0.000 1 2
PH phosphorus monohydride rPH 1.422   1.422 0.000 1 2
CH3CHO Acetaldehyde rCH 1.086   1.086 0.000 2 5
C2H2 Acetylene rC#C 1.203   1.202 0.000 1 2
NO+ nitric oxide cation rN=O 1.066   1.066 0.000 1 2
CH3Br methyl bromide rCH 1.082 ±0.001 1.082 0.000 1 3
BrO Bromine monoxide rOBr 1.718   1.718 0.000 1 2
H2CSe Selenoformaldehyde rC=Se 1.753   1.753 0.000 1 2
HOCl hypochlorous acid rClO 1.697 ±0.001 1.698 0.000 1 3
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
CO+ carbon monoxide cation rC=O 1.115 ±0.000 1.116 0.000 1 2
HS- mercapto anion rSH 1.343   1.344 0.000 1 2
CH3CHS Thioacetaldehyde rCH 1.089   1.089 0.000 1 4
CN Cyano radical rC#N 1.172   1.172 0.001 1 2
OH Hydroxyl radical rOH 0.970   0.970 0.001 1 2
CH2CO Ketene rC=O 1.162   1.163 0.001 2 3
CH3CSNH2 Ethanethioamide rC=S 1.647 ±0.002 1.648 0.001 1 2
C3H4 cyclopropene rCH 1.072   1.073 0.001 2 4
HCl Hydrogen chloride rHCl 1.275 ±0.000 1.276 0.001 1 2
N2 Nitrogen diatomic rN#N 1.098   1.099 0.001 1 2
CH3CH2OH Ethanol rCH 1.088   1.089 0.001 1 5
SCSe Carbon sulfide selenide rC=S 1.553 ±0.002 1.554 0.001 1 2
H2O Water rOH 0.958 ±0.000 0.959 0.001 1 2
CH3OCH3 Dimethyl ether rCH 1.085 ±0.001 1.086 0.001 2 4
SbH3 Stibine rSbH 1.700 ±0.000 1.701 0.001 1 2
CH2CHF Ethene, fluoro- rCH 1.077   1.078 0.001 2 5
CH3CHFCH3 2-Fluoropropane rCH 1.088 ±0.006 1.089 0.001 4 6
ICN Cyanogen iodide rC#N 1.160 ±0.000 1.162 0.002 2 3
HCl+ hydrogen chloride cation rHCl 1.315   1.317 0.002 1 2
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
LiCl lithium chloride rLiCl 2.021 ±0.000 2.023 0.002 1 2
CH3NH2 methyl amine rCH 1.093 ±0.000 1.095 0.002 1 3
HBr+ hydrogen bromide cation rHBr 1.448   1.451 0.003 1 2
H2Se Hydrogen selenide rSeH 1.460   1.463 0.003 1 2
HF Hydrogen fluoride rHF 0.917 ±0.000 0.919 0.003 1 2
HBr hydrogen bromide rHBr 1.414 ±0.000 1.417 0.003 1 2
C3H6 Cyclopropane rCC 1.501   1.504 0.003 1 2
SiH2F2 difluorosilane rSiH 1.462   1.465 0.003 1 4
CH2F2 Methane, difluoro- rCH 1.084 ±0.003 1.087 0.003 1 2
C2H6O2S Dimethyl sulfone rCS 1.777 ±0.006 1.781 0.004 1 4
CBr4 Carbon tetrabromide rCBr 1.942 ±0.002 1.946 0.004 1 2
BO boron monoxide rB=O 1.205   1.208 0.004 1 2
C2H3 vinyl rCH 1.085   1.089 0.004 2 4
NCl nitrogen monochloride rNCl 1.611 ±0.000 1.615 0.004 1 2
C4H8O2 Ethyl acetate rC=O 1.203   1.207 0.004 2 4
OCSe Carbonyl selenide rC=Se 1.709   1.713 0.004 1 3
MgH magnesium monohydride rMgH 1.730   1.734 0.004 1 2
KrH+ Protonated Krypton rHKr 1.421 ±0.000 1.426 0.005 1 2
CH2CHCH2CH3 1-Butene rCC 1.493   1.498 0.005 2 3
HNO3 Nitric acid rNO 1.406   1.411 0.005 1 2
C4H8O2 Ethyl acetate rCO 1.345   1.350 0.005 2 3
AsH3 Arsine rAsH 1.511 ±0.000 1.516 0.005 1 2
PS phosphorus sulfide rP=S 1.900   1.906 0.006 1 2
LiI Lithium Iodide rLiI 2.392 ±0.000 2.398 0.006 1 2
SeCl2 Selenium Dichloride rClSe 2.157 ±0.003 2.163 0.006 1 2
LiF lithium fluoride rLiF 1.564 ±0.000 1.570 0.006 1 2
O2 Oxygen diatomic rO=O 1.208   1.214 0.006 1 2
SF Monosulfur monofluoride rSF 1.599   1.606 0.006 1 2
GeH germylidene rGeH 1.588   1.594 0.006 1 2
PF5 Phosphorus pentafluoride rFP 1.577   1.584 0.007 1 5
CH2Cl2 Methylene chloride rCCl 1.767 ±0.002 1.774 0.007 1 4
CH3I methyl iodide rCI 2.136 ±0.002 2.143 0.007 1 2
OPCl Phosphorus oxychloride rP=O 1.462 ±0.011 1.469 0.007 1 2
SCSe Carbon sulfide selenide rC=Se 1.695 ±0.002 1.702 0.007 1 3
PN Phosphorus mononitride rP#N 1.491   1.499 0.008 1 2
SiI4 silicon tetraiodide rSiI 2.432 ±0.005 2.440 0.008 1 2
IF Iodine monofluoride rFI 1.910   1.918 0.008 1 2
CH3CH2OH Ethanol rCH 1.086   1.094 0.008 2 8
SiH3F monofluorosilane rSiF 1.595   1.603 0.008 1 2
CH2F2 Methane, difluoro- rCF 1.351 ±0.001 1.359 0.008 1 4
As4 Arsenic tetramer rAsAs 2.435   2.443 0.008 1 2
ClF Chlorine monofluoride rFCl 1.628 ±0.000 1.637 0.008 1 2
CSe Carbon monoselenide rC=Se 1.676 ±0.000 1.685 0.009 1 2
CrH Chromium hydride rHCr 1.655 ±0.001 1.664 0.009 1 2
CHF3 Methane, trifluoro- rCF 1.328 ±0.003 1.337 0.009 1 3
CI4 tetraiodomethane rCI 2.157 ±0.010 2.166 0.009 1 2
ICl Iodine monochloride rClI 2.321 ±0.000 2.330 0.009 1 2
CH2Br2 dibromomethane rCBr 1.925 ±0.002 1.934 0.009 1 4
SO+ sulfur monoxide cation rO=S 1.424   1.433 0.009 1 2
BrF Bromine monofluoride rFBr 1.759 ±0.000 1.769 0.010 1 2
SiH3Cl chlorosilane rSiCl 2.051   2.060 0.010 1 2
AlNC Aluminum isocyanide rAlN 1.855 ±0.005 1.865 0.010 1 2
SiO Silicon monoxide rSiO 1.510 ±0.000 1.520 0.011 1 2
I2 Iodine diatomic rII 2.665   2.676 0.011 1 2
LiBr Lithium Bromide rLiBr 2.170 ±0.000 2.181 0.011 1 2
CaC Calcium monocarbide rC#Ca 2.302   2.312 0.011 1 2
PF2 Phosphorus difluoride rPF 1.579   1.590 0.011 1 2
SiS silicon monosulfide rSiS 1.929 ±0.000 1.940 0.011 1 2
PF5 Phosphorus pentafluoride rPF 1.534   1.545 0.011 1 2
CH3Br methyl bromide rCBr 1.934 ±0.000 1.946 0.012 1 2
GeH3F monofluorogermane rGeH 1.515 ±0.000 1.526 0.012 1 3
TeO Tellurium monoxide rO=Te 1.825   1.837 0.012 1 2
C2H6O2S Dimethyl sulfone rS=O 1.431 ±0.004 1.444 0.013 1 2
SO Sulfur monoxide rS=O 1.481   1.494 0.013 1 2
SSO Disulfur monoxide rS=O 1.456   1.469 0.013 1 2
Cl2+ chlorine diatomic cation rClCl 1.892   1.905 0.013 1 2
NO- nitric oxide anion rN=O 1.258 ±0.010 1.271 0.013 1 2
S2 Sulfur diatomic rS=S 1.889   1.903 0.014 1 2
SF4 Sulfur tetrafluoride rSF 1.646 ±0.003 1.660 0.014 1 2
SF4 Sulfur tetrafluoride rSF 1.545 ±0.003 1.559 0.014 1 4
AlF Aluminum monofluoride rAlF 1.654 ±0.000 1.668 0.014 1 2
CH2I2 Diiodomethane rCH 1.066 ±0.015 1.080 0.014 1 4
IBr Iodine monobromide rBrI 2.469 ±0.000 2.483 0.014 1 2
SiCl Clorosilylidyne rSiCl 2.061 ±0.000 2.076 0.015 1 2
SeO Selenium monoxide rSeO 1.639 ±0.001 1.654 0.015 1 2
SeO2 Selenium dioxide rSeO 1.607 ±0.001 1.622 0.015 1 2
SSO Disulfur monoxide rS=S 1.884   1.900 0.015 2 3
SiF2 Silicon difluoride rFSi 1.590 ±0.000 1.606 0.015 1 2
BrCl Bromine monochloride rClBr 2.136 ±0.000 2.152 0.016 1 2
GeBr4 Germanium tetrabromide rGeBr 2.272 ±0.001 2.289 0.017 1 2
GeH3F monofluorogermane rGeF 1.731 ±0.000 1.748 0.017 1 2
GaF Gallium monofluoride rFGa 1.774 ±0.000 1.792 0.017 1 2
GeO Germanium monoxide rOGe 1.625   1.642 0.018 1 2
GeF Germanium monofluoride rFGe 1.745   1.763 0.018 1 2
Se2 Selenium diatomic rSe=Se 2.166 ±0.001 2.184 0.018 1 2
C3O2 Carbon suboxide rC=O 1.146   1.164 0.018 2 4
Br2 Bromine diatomic rBrBr 2.281   2.300 0.019 1 2
HSiCl Chlorosilylene rSiCl 2.067 ±0.003 2.086 0.019 1 2
SiBr+ Silicon monobromide cation rSiBr 2.095 ±0.000 2.115 0.020 1 2
OPCl Phosphorus oxychloride rPCl 2.059 ±0.004 2.079 0.020 1 3
GeCl Germanium monochloride rClGe 2.164 ±0.000 2.184 0.021 1 2
AlI Aluminum monoiodide rAlI 2.537 ±0.000 2.559 0.022 1 2
C3O2 Carbon suboxide rC=C 1.251   1.274 0.023 1 2
XeF4 Xenon tetrafluoride rFXe 1.935 ±0.000 1.959 0.024 1 2
XeF2 Xenon difluoride rFXe 1.974 ±0.000 1.999 0.025 1 2
He2+ helium diatomic cation rHeHe 1.081 ±0.001 1.109 0.028 1 2
GaBr Gallium monobromide rGaBr 2.352 ±0.000 2.382 0.029 1 2
AlBr Aluminum monobromide rAlBr 2.295   2.325 0.030 1 2
NaLi lithium sodium rLiNa 2.889   2.920 0.031 1 2
GaAs Gallium arsenide rGa#As 2.530 ±0.020 2.562 0.032 1 2
KH Potassium hydride rKH 2.243 ±0.001 2.281 0.039 1 2
CaBr Calcium monobromide rCaBr 2.594 ±0.000 2.633 0.040 1 2
CaO Calcium monoxide rOCa 1.822   1.873 0.051 1 2
C4H8O2 Ethyl acetate rCO 1.448   1.510 0.062 5 6
C4H10O Methyl propyl ether rCH 1.099   1.410 0.311 1 2
218 molecules.