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Average Bond Length Differences by Model Chemistry

Calculated at HF/daug-cc-pVDZ

Species Name Bond type Bond Length (Å)
Experimental unc. Calculated Difference atom1 atom2
SiP Silicon monophosphide rSiP 2.078 ±0.002 1.983 -0.094 1 2
F2 Fluorine diatomic rFF 1.412   1.338 -0.074 1 2
HNO3 Nitric acid rNO 1.406   1.333 -0.073 1 2
O2 Oxygen diatomic rO=O 1.208   1.162 -0.045 1 2
C2H2O2 Ethanedial rCH 1.132   1.098 -0.034 1 3
OCSe Carbonyl selenide rC=O 1.159   1.125 -0.034 1 2
HF+ hydrogen fluoride cation rHF 1.014   0.983 -0.032 1 2
NO Nitric oxide rN=O 1.154 ±0.000 1.123 -0.031 1 2
SeO2 Selenium dioxide rSeO 1.607 ±0.001 1.577 -0.030 1 2
HOCl hypochlorous acid rOH 0.973 ±0.002 0.947 -0.026 1 2
PN Phosphorus mononitride rP#N 1.491   1.465 -0.026 1 2
SeO Selenium monoxide rSeO 1.639 ±0.001 1.615 -0.025 1 2
HOCl hypochlorous acid rClO 1.697 ±0.001 1.675 -0.022 1 3
CO+ carbon monoxide cation rC=O 1.115 ±0.000 1.094 -0.021 1 2
C4H8O2 Ethyl acetate rCH 1.105   1.084 -0.021 1 7
SO+ sulfur monoxide cation rO=S 1.424   1.403 -0.021 1 2
CH2CO Ketene rC=O 1.162   1.141 -0.021 2 3
N2 Nitrogen diatomic rN#N 1.098   1.078 -0.020 1 2
C4H8O2 Ethyl acetate rCO 1.345   1.327 -0.018 2 3
Se2 Selenium diatomic rSe=Se 2.166 ±0.001 2.148 -0.018 1 2
GeO Germanium monoxide rOGe 1.625   1.607 -0.018 1 2
C2H2+ acetylene cation rC=C 1.253 ±0.001 1.235 -0.018 1 2
CO Carbon monoxide rC#O 1.128 ±0.000 1.111 -0.018 1 2
OH- hydroxide anion rOH 0.964   0.947 -0.017 1 2
BrF Bromine monofluoride rFBr 1.759 ±0.000 1.742 -0.017 1 2
HF Hydrogen fluoride rHF 0.917 ±0.000 0.900 -0.017 1 2
H2CSe Selenoformaldehyde rC=Se 1.753   1.737 -0.016 1 2
CH3NH2 methyl amine rNH 1.018 ±0.001 1.002 -0.016 2 6
CSe Carbon monoselenide rC=Se 1.676 ±0.000 1.660 -0.016 1 2
CH3NH2 methyl amine rCN 1.471 ±0.003 1.456 -0.015 1 2
CH3OCH3 Dimethyl ether rCO 1.411 ±0.001 1.396 -0.015 1 2
OH Hydroxyl radical rOH 0.970   0.955 -0.015 1 2
CH3CH2CHO Propanal rCH 1.103   1.088 -0.015 1 6
H2O Water rOH 0.958 ±0.000 0.943 -0.015 1 2
AsH Arsenic monohydride rAsH 1.535 ±0.001 1.521 -0.014 1 2
HSe Selenium monohydride rSeH 1.475 ±0.010 1.462 -0.013 1 2
CH2NH Methanimine rCH 1.103   1.090 -0.013 1 3
C4H8O2 Ethyl acetate rC=O 1.203   1.190 -0.013 2 4
CH3CH2CHO Propanal rCH 1.115   1.103 -0.012 3 10
NO- nitric oxide anion rN=O 1.258 ±0.010 1.246 -0.012 1 2
HNCNH diiminomethane rC=N 1.224 ±0.001 1.212 -0.012 1 2
C8H8 cubane rCH 1.097   1.085 -0.012 1 9
CH3CHO Acetaldehyde rCH 1.114   1.103 -0.011 1 4
CH3CH2CHO Propanal rCH 1.105   1.094 -0.011 2 8
C2H2 Acetylene rC#C 1.203   1.192 -0.010 1 2
CN Cyano radical rC#N 1.172   1.162 -0.010 1 2
C3O2 Carbon suboxide rC=O 1.146   1.137 -0.009 2 4
CHF3 Methane, trifluoro- rCF 1.328 ±0.003 1.320 -0.009 1 3
CHF3 Methane, trifluoro- rCH 1.091 ±0.014 1.082 -0.009 1 2
CH3CH2OH Ethanol rCH 1.098   1.090 -0.008 1 6
B2H6 Diborane rBH 1.200   1.192 -0.008 1 5
SCSe Carbon sulfide selenide rC=S 1.553 ±0.002 1.545 -0.008 1 2
ArH+ Argon hydride cation rArH 1.292 ±0.000 1.284 -0.008 1 2
H2CSe Selenoformaldehyde rHC 1.090   1.083 -0.007 1 3
CH3CCH propyne rCH 1.096   1.089 -0.007 1 5
CH2F2 Methane, difluoro- rCF 1.351 ±0.001 1.344 -0.007 1 4
CH2CO Ketene rCH 1.083   1.076 -0.007 1 4
As4 Arsenic tetramer rAsAs 2.435   2.428 -0.007 1 2
CF Fluoromethylidyne rCF 1.276   1.269 -0.007 1 2
H2CS Thioformaldehyde rC=S 1.611   1.604 -0.007 1 2
CH3CH2CHO Propanal rCH 1.096   1.090 -0.006 1 5
CH3CHClCH3 Propane, 2-chloro- rCH 1.091   1.085 -0.006 2 5
HBr+ hydrogen bromide cation rHBr 1.448   1.443 -0.006 1 2
HSiCl Chlorosilylene rSiH 1.525 ±0.005 1.519 -0.006 1 3
C2H2O2 Ethanedial rCC 1.526   1.521 -0.005 1 2
CH3CHS Thioacetaldehyde rCH 1.098   1.093 -0.005 2 6
CH2Cl2 Methylene chloride rCH 1.085 ±0.002 1.080 -0.005 1 2
CH3OCH3 Dimethyl ether rCH 1.099 ±0.001 1.094 -0.005 2 6
NH2SH Thiohydroxylamine rSH 1.344 ±0.029 1.339 -0.005 2 3
CH3CHS Thioacetaldehyde rCH 1.090   1.085 -0.005 2 5
CH2CHF Ethene, fluoro- rCH 1.082   1.078 -0.004 1 4
CH Methylidyne rCH 1.120   1.116 -0.004 1 2
C3H8 Propane rCH 1.096   1.092 -0.004 1 4
C4H8O2 Ethyl acetate rCC 1.508   1.505 -0.003 1 2
C3H6 Cyclopropane rCH 1.083   1.080 -0.003 1 4
SSO Disulfur monoxide rS=O 1.456   1.454 -0.003 1 2
CH3CH2CHO Propanal rCC 1.509   1.507 -0.002 2 3
SSO Disulfur monoxide rS=S 1.884   1.882 -0.002 2 3
SO Sulfur monoxide rS=O 1.481   1.479 -0.002 1 2
HBr hydrogen bromide rHBr 1.414 ±0.000 1.412 -0.002 1 2
H2Se Hydrogen selenide rSeH 1.460   1.458 -0.002 1 2
CH3CHS Thioacetaldehyde rCH 1.089   1.087 -0.002 1 4
C4H8O2 Ethyl acetate rCC 1.515   1.513 -0.002 5 6
C2H2 Acetylene rCH 1.063   1.062 -0.001 1 3
Cl2+ chlorine diatomic cation rClCl 1.892   1.890 -0.001 1 2
CH3CHClCH3 Propane, 2-chloro- rCH 1.092   1.092 0.000 3 6
C3H4 cyclopropene rCH 1.088   1.088 0.000 1 6
SCSe Carbon sulfide selenide rC=Se 1.695 ±0.002 1.695 0.000 1 3
C2H2+ acetylene cation rCH 1.077 ±0.005 1.077 0.000 1 3
CH3CH2CHO Propanal rCC 1.523   1.523 0.000 1 2
CH3CHO Acetaldehyde rCH 1.086   1.086 0.000 2 5
SiO Silicon monoxide rSiO 1.510 ±0.000 1.510 0.000 1 2
C3H4 cyclopropene rCH 1.072   1.073 0.001 2 4
CH3CCH propyne rCH 1.060   1.061 0.001 3 4
CH3Br methyl bromide rCH 1.082 ±0.001 1.083 0.001 1 3
S2 Sulfur diatomic rS=S 1.889   1.890 0.001 1 2
CH2F2 Methane, difluoro- rCH 1.084 ±0.003 1.085 0.001 1 2
C3H6 Cyclopropane rCC 1.501   1.502 0.001 1 2
HCl+ hydrogen chloride cation rHCl 1.315   1.316 0.001 1 2
CH3OCH3 Dimethyl ether rCH 1.085 ±0.001 1.087 0.002 2 4
CH2CHF Ethene, fluoro- rCH 1.077   1.079 0.002 2 5
CH3NH2 methyl amine rCH 1.093 ±0.000 1.095 0.002 1 3
CH4 Methane rCH 1.087 ±0.001 1.089 0.002 1 2
AsH3 Arsine rAsH 1.511 ±0.000 1.513 0.003 1 2
SiH3Cl chlorosilane rSiH 1.475   1.478 0.003 1 3
CH3CH2OH Ethanol rCH 1.088   1.091 0.003 1 5
HCl Hydrogen chloride rHCl 1.275 ±0.000 1.277 0.003 1 2
PH phosphorus monohydride rPH 1.422   1.425 0.003 1 2
SiH3F monofluorosilane rSiH 1.476   1.479 0.003 1 3
SiS silicon monosulfide rSiS 1.929 ±0.000 1.933 0.004 1 2
GeH germylidene rGeH 1.588   1.592 0.004 1 2
GaF Gallium monofluoride rFGa 1.774 ±0.000 1.779 0.005 1 2
CH2Br2 dibromomethane rCBr 1.925 ±0.002 1.931 0.006 1 4
SeCl2 Selenium Dichloride rClSe 2.157 ±0.003 2.163 0.006 1 2
SiH4 Silane rSiH 1.480 ±0.000 1.486 0.006 1 2
H2 Hydrogen diatomic rHH 0.741   0.748 0.007 1 2
CH3CH2OH Ethanol rCH 1.086   1.093 0.007 2 8
B2H6 Diborane rBH 1.320   1.327 0.007 1 3
GeH3F monofluorogermane rGeF 1.731 ±0.000 1.739 0.008 1 2
SiH2F2 difluorosilane rSiH 1.462   1.469 0.008 1 4
SF4 Sulfur tetrafluoride rSF 1.646 ±0.003 1.654 0.008 1 2
PF5 Phosphorus pentafluoride rFP 1.577   1.585 0.008 1 5
SF4 Sulfur tetrafluoride rSF 1.545 ±0.003 1.553 0.008 1 4
SiH Silylidyne rSiH 1.520   1.528 0.008 1 2
CH2Cl2 Methylene chloride rCCl 1.767 ±0.002 1.776 0.009 1 4
BF Boron monofluoride rBF 1.267 ±0.000 1.275 0.009 1 2
GeF Germanium monofluoride rFGe 1.745   1.755 0.010 1 2
LiF lithium fluoride rLiF 1.564 ±0.000 1.574 0.010 1 2
MgH magnesium monohydride rMgH 1.730   1.740 0.011 1 2
LiNH2 lithium amide rLiN 1.736 ±0.003 1.748 0.012 1 2
CH3CSNH2 Ethanethioamide rC=S 1.647 ±0.002 1.659 0.012 1 2
PF5 Phosphorus pentafluoride rPF 1.534   1.548 0.014 1 2
GeH3F monofluorogermane rGeH 1.515 ±0.000 1.529 0.015 1 3
SF Monosulfur monofluoride rSF 1.599   1.614 0.015 1 2
CH3Br methyl bromide rCBr 1.934 ±0.000 1.949 0.015 1 2
BrCl Bromine monochloride rClBr 2.136 ±0.000 2.151 0.015 1 2
AlF Aluminum monofluoride rAlF 1.654 ±0.000 1.671 0.017 1 2
Br2 Bromine diatomic rBrBr 2.281   2.298 0.017 1 2
Cl2 Chlorine diatomic rClCl 1.988   2.007 0.019 1 2
C3O2 Carbon suboxide rC=C 1.251   1.272 0.021 1 2
LiH Lithium Hydride rLiH 1.595 ±0.000 1.617 0.022 1 2
OCSe Carbonyl selenide rC=Se 1.709   1.732 0.023 1 3
PF2 Phosphorus difluoride rPF 1.579   1.606 0.027 1 2
ClO Monochlorine monoxide rClO 1.596 ±0.001 1.624 0.028 1 2
SiH3F monofluorosilane rSiF 1.595   1.624 0.030 1 2
SiF2 Silicon difluoride rFSi 1.590 ±0.000 1.620 0.030 1 2
AlNC Aluminum isocyanide rAlN 1.855 ±0.005 1.885 0.031 1 2
SiBr+ Silicon monobromide cation rSiBr 2.095 ±0.000 2.129 0.033 1 2
LiCl lithium chloride rLiCl 2.021 ±0.000 2.061 0.040 1 2
SiH3Cl chlorosilane rSiCl 2.051   2.095 0.044 1 2
LiBr Lithium Bromide rLiBr 2.170 ±0.000 2.221 0.050 1 2
GeCl Germanium monochloride rClGe 2.164 ±0.000 2.216 0.052 1 2
BrO Bromine monoxide rOBr 1.718   1.772 0.054 1 2
HSiCl Chlorosilylene rSiCl 2.067 ±0.003 2.123 0.056 1 2
SiCl Clorosilylidyne rSiCl 2.061 ±0.000 2.119 0.058 1 2
GaAs Gallium arsenide rGa#As 2.530 ±0.020 2.592 0.062 1 2
PS phosphorus sulfide rP=S 1.900   1.964 0.064 1 2
C4H8O2 Ethyl acetate rCO 1.448   1.513 0.065 5 6
GaBr Gallium monobromide rGaBr 2.352 ±0.000 2.424 0.071 1 2
AlBr Aluminum monobromide rAlBr 2.295   2.371 0.077 1 2
160 molecules.