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Release 17bSeptember 2015
NIST Standard Reference Database 101
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IV.D.8.

Average Bond Length Differences by Model Chemistry

Calculated at CID/6-311G*

Species Name Bond type Bond Length (Å)
Experimental unc. Calculated Difference atom1 atom2
Si2 Silicon diatomic rSiSi 2.246   2.151 -0.095 1 2
SiP Silicon monophosphide rSiP 2.078 ±0.002 2.016 -0.062 1 2
PS phosphorus sulfide rP=S 1.900   1.838 -0.062 1 2
CH2O2 Dioxirane rOO 1.516 ±0.003 1.462 -0.054 4 5
LiCl- lithium chloride anion rLiCl 2.180   2.129 -0.051 1 2
CN Cyano radical rC#N 1.172   1.135 -0.037 1 2
SiN Silicon nitride rSiN 1.575   1.541 -0.034 1 2
ScH Scandium monohydride rHSc 1.775 ±0.000 1.743 -0.033 1 2
C3H8O2 1,3-Propanediol rOH 0.980   0.948 -0.032 6 8
C2H Ethynyl radical rC#C 1.217   1.185 -0.032 1 2
F2 Fluorine diatomic rFF 1.412   1.380 -0.032 1 2
LiO lithium oxide rLiO 1.688   1.660 -0.028 1 2
FO Oxygen monofluoride rFO 1.354   1.327 -0.027 1 2
HO2 Hydroperoxy radical rOO 1.331   1.304 -0.027 1 2
C9H8 Indene rCC 1.415 ±0.170 1.389 -0.026 1 2
Si(CH3)4 tetramethylsilane rCH 1.115 ±7.000 1.090 -0.025 2 6
P2+ phosphorus dimer cation rPP 1.986   1.961 -0.025 1 2
CO+ carbon monoxide cation rC=O 1.115 ±0.000 1.091 -0.024 1 2
CH3OCl methyl hypochlorite rHC 1.111 ±0.018 1.087 -0.024 3 4
LiOH lithium hydroxide rOH 0.969   0.945 -0.024 1 3
NO Nitric oxide rN=O 1.154 ±0.000 1.130 -0.024 1 2
CHF2Cl difluorochloromethane rCF 1.350 ±0.010 1.327 -0.023 1 4
HClO4 perchloric acid rHO 0.980   0.958 -0.022 3 6
O2 Oxygen diatomic rO=O 1.208   1.186 -0.022 1 2
O2+ diatomic oxygen cation rOO 1.116   1.095 -0.021 1 2
CH2FCl fluorochloromethane rCF 1.370 ±0.001 1.350 -0.020 1 2
HF+ hydrogen fluoride cation rHF 1.014   0.995 -0.020 1 2
HClO4 perchloric acid rOCl 1.641 ±0.002 1.621 -0.020 1 3
CP Carbon monophosphide rC#P 1.562   1.543 -0.019 1 2
NS+ nitrogen sulfide cation rNS 1.440   1.421 -0.019 1 2
BN boron nitride rB=N 1.325   1.307 -0.018 1 2
CH2O2 Dioxirane rCO 1.388 ±0.004 1.370 -0.018 1 4
BeO beryllium oxide rBe=O 1.331   1.314 -0.017 1 2
CH3CH2CHO Propanal rCH 1.103   1.087 -0.016 1 6
N3 azide radical rNN 1.181   1.166 -0.016 1 2
CF3COOH trifluoroacetic acid rCC 1.546 ±0.005 1.531 -0.015 1 2
C2HF3 Trifluoroethylene rCF 1.316 ±0.011 1.301 -0.015 1 3
SiH2Cl2 dichlorosilane rSiH 1.480 ±0.015 1.465 -0.015 1 2
NS Mononitrogen monosulfide rNS 1.497 ±0.000 1.482 -0.015 1 2
SOCl2 thionyl chloride rS=O 1.443 ±0.006 1.429 -0.014 1 2
NF nitrogen fluoride rNF 1.317   1.303 -0.014 1 2
CH2Cl chloromethyl radical rHC 1.090 ±0.010 1.077 -0.013 1 3
CH3CH(NH2)COOH Alanine rCC 1.544   1.531 -0.013 3 4
PN Phosphorus mononitride rP#N 1.491   1.479 -0.012 1 2
C4H6 Bicyclo[1.1.0]butane rCC 1.497   1.485 -0.012 1 2
CF3COOH trifluoroacetic acid rC=O 1.192 ±0.003 1.180 -0.012 2 4
NO+ nitric oxide cation rN=O 1.066   1.054 -0.012 1 2
CH3CH2CHO Propanal rCH 1.105   1.093 -0.012 2 8
PO2 Phosphorus dioxide rP=O 1.467   1.455 -0.011 1 2
P2 Phosphorus diatomic rP#P 1.893   1.882 -0.011 1 2
LiOH lithium hydroxide rLiO 1.582   1.571 -0.011 1 2
PO Phosphorus monoxide rP=O 1.476   1.465 -0.011 1 2
CH3CH2CHO Propanal rCH 1.115   1.104 -0.011 3 10
CH2NH Methanimine rCH 1.103   1.093 -0.010 1 3
CH3NH2 methyl amine rCN 1.471 ±0.003 1.461 -0.010 1 2
BO boron monoxide rB=O 1.205   1.194 -0.010 1 2
CH3NH2 methyl amine rNH 1.018 ±0.001 1.008 -0.010 2 6
HO2 Hydroperoxy radical rOH 0.971   0.961 -0.010 1 3
CF Fluoromethylidyne rCF 1.276   1.267 -0.009 1 2
CSe Carbon monoselenide rC=Se 1.676 ±0.000 1.667 -0.009 1 2
B2H6 Diborane rBH 1.200   1.191 -0.009 1 5
CS carbon monosulfide rC#S 1.535   1.526 -0.009 1 2
CH3CH2CHO Propanal rCH 1.096   1.088 -0.008 1 5
HClO4 perchloric acid rO=Cl 1.414 ±0.001 1.406 -0.008 1 2
SiS silicon monosulfide rSiS 1.929 ±0.000 1.922 -0.008 1 2
CH3NC methyl isocyanide rCH 1.094   1.087 -0.007 1 4
SiO Silicon monoxide rSiO 1.510 ±0.000 1.502 -0.007 1 2
S2+ sulfur dimer cation rS=S 1.825 ±0.010 1.818 -0.007 1 2
NH+ imidogen cation rHN 1.070 ±0.001 1.063 -0.007 1 2
CH2FCl fluorochloromethane rCH 1.090 ±0.010 1.083 -0.007 1 4
HNCNH diiminomethane rC=N 1.224 ±0.001 1.218 -0.007 1 2
CH2PH H2CPH rCH 1.090 ±0.015 1.083 -0.007 1 3
CO Carbon monoxide rC#O 1.128 ±0.000 1.122 -0.007 1 2
CH2CHCH2CH3 1-Butene rCC 1.536   1.529 -0.007 1 2
H2CS Thioformaldehyde rC=S 1.611   1.604 -0.007 1 2
KF Potassium Fluoride rKF 2.171 ±0.000 2.165 -0.007 1 2
CH2O2 Dioxirane rCH 1.090 ±0.002 1.084 -0.006 1 2
PH+ phosphorus monohydride cation rHP 1.435   1.429 -0.006 1 2
SO+ sulfur monoxide cation rO=S 1.424   1.418 -0.006 1 2
CN- cyanide anion rC#N 1.177 ±0.004 1.171 -0.006 1 2
CH2PH H2CPH rCH 1.090 ±0.015 1.085 -0.005 1 4
SH+ sulfur monohydride cation rHS 1.374   1.370 -0.005 1 2
CBr4 Carbon tetrabromide rCBr 1.942 ±0.002 1.937 -0.005 1 2
H2O Water rOH 0.958 ±0.000 0.953 -0.004 1 2
ArH+ Argon hydride cation rHAr 1.292 ±0.000 1.288 -0.004 1 2
BeS beryllium sulfide rBe=S 1.742   1.737 -0.004 1 2
DF Hydrofluoric acid-d rDF 0.917 ±0.000 0.913 -0.004 1 2
C2- carbon diatomic anion rC#C 1.268 ±0.000 1.264 -0.004 1 2
HOBr Hypobromous acid rOH 0.961   0.957 -0.004 1 2
N2 Nitrogen diatomic rN#N 1.098   1.094 -0.004 1 2
CH2 Methylene rCH 1.085   1.081 -0.004 1 2
C4H8 cyclobutane rCH 1.093   1.089 -0.004 1 5
NO- nitric oxide anion rN=O 1.258 ±0.010 1.254 -0.004 1 2
BF Boron monofluoride rBF 1.267 ±0.000 1.263 -0.004 1 2
HF Hydrogen fluoride rHF 0.917 ±0.000 0.913 -0.004 1 2
CSe2 Carbon diselenide rC=Se 1.692 ±0.000 1.689 -0.004 1 2
C5H7N Cyclobutanecarbonitrile rCC 1.551   1.547 -0.004 3 6
BS boron sulfide rBS 1.609   1.606 -0.003 1 2
CH3NC methyl isocyanide rCN 1.426 ±0.003 1.423 -0.003 1 2
C4H8 cyclobutane rCH 1.091   1.088 -0.003 1 6
CH3CH2CHO Propanal rCC 1.523   1.520 -0.003 1 2
BCl boron monochloride rBCl 1.719 ±0.000 1.717 -0.003 1 2
TiCl Titanium Monochloride rClTi 2.265 ±0.000 2.262 -0.003 1 2
CH3NC methyl isocyanide rC#N 1.166 ±0.003 1.163 -0.003 2 3
CH3CH2CHO Propanal rCC 1.509   1.507 -0.002 2 3
DO Hydroxyl-d rDO 0.970   0.967 -0.002 1 2
OH Hydroxyl radical rOH 0.970   0.967 -0.002 1 2
C3H6 Cyclopropane rCH 1.083   1.081 -0.002 1 4
BF3 Borane, trifluoro- rBF 1.307   1.305 -0.002 1 2
C2H2 Acetylene rC#C 1.203   1.201 -0.002 1 2
AlS Aluminum sulfide rAlS 2.029   2.027 -0.002 1 2
CuH Copper monohydride rHCu 1.463   1.461 -0.002 1 2
C3H3NO Oxazole rCO 1.357   1.356 -0.002 1 5
SiH3F monofluorosilane rSiH 1.476   1.475 -0.001 1 3
P2H4 H2PPH2 rPH 1.417   1.416 -0.001 1 3
CH3I methyl iodide rCH 1.084 ±0.003 1.083 -0.001 1 3
F2SO Thionyl Fluoride rO=S 1.413 ±0.000 1.412 -0.001 1 2
HCCCN Cyanoacetylene rCH 1.062 ±0.001 1.062 -0.001 4 5
SiH3Cl chlorosilane rSiH 1.475   1.474 -0.001 1 3
LiCl lithium chloride rLiCl 2.021 ±0.000 2.021 -0.000 1 2
C2H2 Acetylene rCH 1.063   1.063 0.000 1 3
PO- phosphorus monoxide anion rOP 1.540   1.540 0.000 1 2
CCl2 dichloromethylene rCCl 1.711   1.712 0.000 1 2
P2H4 H2PPH2 rPH 1.414   1.414 0.000 1 4
LiF lithium fluoride rLiF 1.564 ±0.000 1.565 0.001 1 2
B2H6 Diborane rBH 1.320   1.321 0.001 1 3
BH+ boron monohydride cation rHB 1.215   1.215 0.001 1 2
NH Imidogen rNH 1.036   1.038 0.002 1 2
BrF3 Bromine trifluoride rFBr 1.810 ±0.000 1.812 0.002 1 3
As2 Arsenic diatomic rAs#As 2.103   2.105 0.002 1 2
CH3Br methyl bromide rCH 1.082 ±0.001 1.084 0.002 1 3
NH2CONH2 Urea rNH 0.998   1.000 0.002 4 8
MgOH magnesium hydroxide rOH 0.940   0.943 0.003 1 3
C3H6 Cyclopropane rCC 1.501   1.504 0.003 1 2
CH3OCl methyl hypochlorite rHC 1.086 ±0.018 1.089 0.003 3 5
CH4 Methane rCH 1.087 ±0.001 1.090 0.003 1 2
CH2Br2 dibromomethane rCBr 1.925 ±0.002 1.928 0.003 1 4
MgOH magnesium hydroxide rMgO 1.767   1.771 0.004 1 2
SF4 Sulfur tetrafluoride rSF 1.646 ±0.003 1.650 0.004 1 2
CHBr3 bromoform rCBr 1.924 ±0.005 1.928 0.004 1 3
CH3NH2 methyl amine rCH 1.093 ±0.000 1.097 0.004 1 3
C2 Carbon diatomic rC=C 1.243   1.247 0.004 1 2
HCl+ hydrogen chloride cation rHCl 1.315   1.319 0.004 1 2
SiH4 Silane rSiH 1.480 ±0.000 1.484 0.004 1 2
SF4 Sulfur tetrafluoride rSF 1.545 ±0.003 1.549 0.004 1 4
D2 Deuterium diatomic rDD 0.742   0.746 0.005 1 2
H2 Hydrogen diatomic rHH 0.741   0.746 0.005 1 2
HD Deuterium hydride rDH 0.741   0.746 0.005 1 2
C2H3 vinyl rCH 1.085   1.090 0.005 2 4
Si(CH3)4 tetramethylsilane rSiC 1.875 ±0.002 1.880 0.005 1 2
BeCl beryllium chloride rBeCl 1.797   1.802 0.005 1 2
SO Sulfur monoxide rS=O 1.481   1.486 0.005 1 2
HOBr Hypobromous acid rBrO 1.834   1.839 0.005 2 3
CH2FCl fluorochloromethane rCCl 1.762 ±0.000 1.768 0.006 1 3
CH Methylidyne rCH 1.120   1.126 0.006 1 2
OH- hydroxide anion rOH 0.964   0.970 0.006 1 2
SiH+ silicon monohydride cation rHSi 1.504   1.510 0.006 1 2
CH3Br methyl bromide rCBr 1.934 ±0.000 1.940 0.006 1 2
F2SO Thionyl Fluoride rFS 1.585 ±0.000 1.592 0.006 1 3
AlCl Aluminum monochloride rAlCl 2.130 ±0.000 2.137 0.007 1 2
BH3 boron trihydride rBH 1.190   1.197 0.007 1 2
As4 Arsenic tetramer rAsAs 2.435   2.443 0.008 1 2
SeS Selenium monosulfide rS=Se 2.037 ±0.001 2.045 0.008 1 2
CH2CHCH2CH3 1-Butene rCC 1.493   1.502 0.009 2 3
CHF2Cl difluorochloromethane rCCl 1.747 ±0.010 1.756 0.009 1 3
HOCl hypochlorous acid rClO 1.691   1.701 0.010 1 3
BeF Beryllium monofluoride rBeF 1.361   1.371 0.010 1 2
SiH2Cl2 dichlorosilane rSiCl 2.033 ±0.003 2.043 0.010 1 4
CH3CH(NH2)COOH Alanine rCC 1.509   1.520 0.011 2 3
S2 Sulfur diatomic rS=S 1.889   1.900 0.011 1 2
BrF3 Bromine trifluoride rFBr 1.721   1.732 0.011 1 2
AlH aluminum monohydride rAlH 1.648   1.659 0.011 1 2
BH Boron monohydride rBH 1.232   1.243 0.011 1 2
DCl Hydrochloric acid-d rDCl 1.275 ±0.000 1.286 0.011 1 2
HCl Hydrogen chloride rHCl 1.275 ±0.000 1.286 0.011 1 2
SiH3Cl chlorosilane rSiCl 2.051   2.062 0.011 1 2
SH Mercapto radical rSH 1.341   1.352 0.012 1 2
DS Mercapto-d rSD 1.341   1.352 0.012 1 2
NaF sodium fluoride rNaF 1.926 ±0.000 1.938 0.012 1 2
PH phosphorus monohydride rPH 1.422   1.435 0.012 1 2
SiF silicon monofluoride rSiF 1.604   1.617 0.012 1 2
PF+ phosphorus monofluoride cation rFP 1.500   1.513 0.013 1 2
SiH Silylidyne rSiH 1.520   1.533 0.013 1 2
BeH2 beryllium dihydride rHBe 1.326 ±0.000 1.339 0.013 1 2
SiF2 Silicon difluoride rFSi 1.590 ±0.000 1.603 0.013 1 2
SiH3F monofluorosilane rSiF 1.595   1.608 0.013 1 2
HClO4 perchloric acid rO=Cl 1.404 ±0.001 1.417 0.013 1 4
HSe Selenium monohydride rHSe 1.475 ±0.010 1.489 0.014 1 2
CH3I methyl iodide rCI 2.136 ±0.002 2.150 0.014 1 2
HBr+ hydrogen bromide cation rHBr 1.448   1.463 0.014 1 2
SiCl Clorosilylidyne rSiCl 2.061 ±0.000 2.076 0.015 1 2
PF phosphorus monofluoride rFP 1.593   1.608 0.015 1 2
BeH beryllium monohydride rBeH 1.343   1.358 0.016 1 2
CCl carbon monochloride rCCl 1.649   1.665 0.016 1 2
AsH Arsenic monohydride rHAs 1.535 ±0.001 1.551 0.016 1 2
C3H5 Allyl radical rCH 1.069   1.085 0.016 1 2
CuF Copper monofluoride rCuF 1.745 ±0.000 1.761 0.017 1 2
GaF Gallium monofluoride rFGa 1.774 ±0.000 1.791 0.017 1 2
C2H Ethynyl radical rCH 1.047   1.064 0.017 1 3
MgS magnesium sulfide rMgS 2.143   2.160 0.017 1 2
SF Monosulfur monofluoride rSF 1.599   1.617 0.018 1 2
AlC Aluminum carbide rC=Al 1.955   1.973 0.018 1 2
AlF Aluminum monofluoride rAlF 1.654 ±0.000 1.673 0.019 1 2
HBr hydrogen bromide rHBr 1.414 ±0.000 1.433 0.019 1 2
Li2 Lithium diatomic rLiLi 2.673   2.693 0.020 1 2
LiH Lithium Hydride rLiH 1.595 ±0.000 1.615 0.020 1 2
AsH3 Arsine rHAs 1.511 ±0.000 1.532 0.021 1 2
MgO magnesium oxide rMgO 1.749   1.772 0.023 1 2
AsF Arsenic monofluoride rFAs 1.736 ±0.001 1.759 0.023 1 2
MgCl magnesium monochloride rMgCl 2.199   2.222 0.023 1 2
ClO Monochlorine monoxide rClO 1.596 ±0.001 1.619 0.023 1 2
NaCl Sodium Chloride rNaCl 2.361 ±0.000 2.384 0.024 1 2
Cl2+ chlorine diatomic cation rClCl 1.892   1.915 0.024 1 2
MgF Magnesium monofluoride rMgF 1.750   1.774 0.024 1 2
B2 Boron diatomic rBB 1.590   1.615 0.025 1 2
AlH+ aluminum monohydride cation rHAl 1.602   1.627 0.025 1 2
ClF Chlorine monofluoride rFCl 1.628 ±0.000 1.654 0.026 1 2
BrF Bromine monofluoride rFBr 1.759 ±0.000 1.786 0.027 1 2
GeH germylidene rHGe 1.588   1.616 0.028 1 2
GeCl Germanium monochloride rCl-Ge 2.164 ±0.000 2.192 0.028 1 2
Br2 Bromine diatomic rBrBr 2.281   2.309 0.028 1 2
HI Hydrogen iodide rHI 1.609 ±0.000 1.640 0.031 1 2
IBr Iodine monobromide rBr-I 2.469 ±0.000 2.500 0.031 1 2
MgH magnesium monohydride rMgH 1.730   1.761 0.031 1 2
BrCl Bromine monochloride rClBr 2.136 ±0.000 2.167 0.031 1 2
PCl phosphorus chloride rPCl 2.018   2.050 0.032 1 2
KH Potassium hydride rHK 2.243 ±0.001 2.276 0.034 1 2
AlN Aluminum nitride rN#Al 1.786   1.820 0.034 1 2
NaH sodium hydride rNaH 1.887 ±0.000 1.921 0.035 1 2
Cl2 Chlorine diatomic rClCl 1.988   2.025 0.037 1 2
IF Iodine monofluoride rFI 1.910   1.949 0.039 1 2
MgH+ magnesium monohydride cation rHMg 1.652   1.693 0.041 1 2
ICl Iodine monochloride rCl-I 2.321 ±0.000 2.363 0.042 1 2
GeF Germanium monofluoride rF-Ge 1.745   1.788 0.042 1 2
NCl nitrogen monochloride rNCl 1.611 ±0.000 1.653 0.043 1 2
SCl sulfur monochloride rSCl 1.975   2.018 0.043 1 2
CaH Calcium monohydride rHCa 2.003 ±0.000 2.046 0.043 1 2
KCl Potassium Chloride rKCl 2.667 ±0.000 2.710 0.043 1 2
BrO Bromine monoxide rOBr 1.718   1.764 0.046 1 2
I2 Iodine diatomic rII 2.665   2.712 0.047 1 2
KBr Potassium Bromide rKBr 2.821 ±0.000 2.869 0.048 1 2
AlO Aluminum monoxide rAlO 1.618   1.666 0.048 1 2
NaLi lithium sodium rLiNa 2.889   2.938 0.049 1 2
He2+ helium dimer cation rHeHe 1.081 ±0.001 1.135 0.054 1 2
Cu2 Copper dimer rCuCu 2.220   2.277 0.057 1 2
CuCl Copper monochloride rCuCl 2.051 ±0.000 2.112 0.061 1 2
GaAs Gallium arsenide rGa#As 2.530 ±0.020 2.596 0.066 1 2
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 ±0.040 2.261 0.221 1 3
C3H3NO Oxazole rCH 1.075   1.385 0.310 3 4
CH3OC2H5 Ethane, methoxy- rCH 1.087   1.397 0.310 1 2
250 molecules.