National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 18October 2016
NIST Standard Reference Database 101
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IV.D.8.

Average Bond Length Differences by Model Chemistry

Calculated at CID/3-21G

Species Name Bond type Bond Length (Å)
Experimental unc. Calculated Difference atom1 atom2
CuF Copper monofluoride rCuF 1.745 ±0.000 1.627 -0.118 1 2
GaF Gallium monofluoride rFGa 1.774 ±0.000 1.710 -0.064 1 2
C6H6 Fulvene rCH 1.130 ±0.030 1.082 -0.048 2 7
CuH Copper monohydride rHCu 1.463   1.419 -0.044 1 2
NaF sodium fluoride rNaF 1.926 ±0.000 1.887 -0.039 1 2
LiF lithium fluoride rLiF 1.564 ±0.000 1.526 -0.038 1 2
GeF Germanium monofluoride rF-Ge 1.745   1.712 -0.033 1 2
CF3COOH trifluoroacetic acid rCC 1.546 ±0.005 1.520 -0.026 1 2
CN Cyano radical rC#N 1.172   1.149 -0.023 1 2
C2H Ethynyl radical rC#C 1.217   1.194 -0.023 1 2
Si(CH3)4 tetramethylsilane rCH 1.115 ±7.000 1.094 -0.021 2 6
C9H8 Indene rCC 1.415 ±0.170 1.395 -0.020 1 2
CH3OCl methyl hypochlorite rHC 1.111 ±0.018 1.092 -0.019 3 4
C5H8 Ethenylcyclopropane rCH 1.099   1.082 -0.017 1 6
CH3CH2CHO Propanal rCH 1.115   1.100 -0.015 3 10
C6H6 Fulvene rC=C 1.349 ±0.002 1.334 -0.015 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.536   1.522 -0.014 1 5
NO Nitric oxide rN=O 1.154 ±0.000 1.140 -0.014 1 2
CH3ONO Methyl nitrite rCH 1.102   1.089 -0.013 1 4
C6H5OCH3 Anisole rCO 1.399   1.386 -0.013 1 7
CH2CHCHO Acrolein rC=C 1.345 ±0.003 1.332 -0.013 2 3
CH3CH2CHO Propanal rCH 1.103   1.091 -0.012 1 6
ScH Scandium monohydride rHSc 1.775 ±0.000 1.764 -0.011 1 2
CH2O2 Dioxirane rCH 1.090 ±0.002 1.081 -0.010 1 2
CH3CH2CHO Propanal rCH 1.105   1.096 -0.009 2 8
C6H6 Fulvene rC=C 1.355 ±0.004 1.347 -0.008 3 5
Si2 Silicon diatomic rSiSi 2.246   2.239 -0.007 1 2
CH2FCl fluorochloromethane rCH 1.090 ±0.010 1.083 -0.007 1 4
C4H6S Thiophene, 2,5-dihydro- rCH 1.095   1.088 -0.007 2 6
CH2CHCHO Acrolein rCH 1.108 ±0.005 1.102 -0.006 1 5
LiO lithium oxide rLiO 1.688   1.682 -0.006 1 2
CH2PH H2CPH rCH 1.090 ±0.015 1.084 -0.006 1 3
C8H8 cyclooctatetraene rC=C 1.337 ±0.001 1.331 -0.006 1 2
CH2PH H2CPH rCH 1.090 ±0.015 1.084 -0.006 1 4
B2H6 Diborane rBH 1.200   1.195 -0.005 1 5
CH3ONO Methyl nitrite rCH 1.090   1.085 -0.005 1 3
CH3CH2CHO Propanal rCH 1.096   1.091 -0.005 1 5
CH2CHCHO Acrolein rCH 1.086 ±0.007 1.082 -0.004 3 7
GeF+ Germanium monofluoride cation rFGe 1.665 ±0.000 1.662 -0.003 1 2
C2H5F fluoroethane rCH 1.095 ±0.007 1.092 -0.003 1 4
CH3NC methyl isocyanide rCH 1.094   1.091 -0.003 1 4
CO+ carbon monoxide cation rC=O 1.115 ±0.000 1.112 -0.003 1 2
C4H8 cyclobutane rCH 1.093   1.091 -0.002 1 5
C6H6 Fulvene rCH 1.080 ±0.005 1.078 -0.002 5 11
C4H8 cyclobutane rCH 1.091   1.089 -0.002 1 6
HNCNH diiminomethane rC=N 1.224 ±0.001 1.223 -0.002 1 2
C3H6 Cyclopropane rCH 1.083   1.082 -0.001 1 4
CH2CHCHO Acrolein rCH 1.084 ±0.005 1.083 -0.001 2 6
CH2 Methylene rCH 1.085   1.084 -0.001 1 2
B2H6 Diborane rBH 1.320   1.319 -0.001 1 3
AsF Arsenic monofluoride rFAs 1.736 ±0.001 1.735 -0.001 1 2
C3H8O2 1,3-Propanediol rOH 0.980   0.979 -0.001 6 8
CH2CHCHO Acrolein rCH 1.086 ±0.007 1.086 -0.000 3 8
C6H6 Fulvene rCH 1.078 ±0.005 1.078 -0.000 3 9
HCCCN Cyanoacetylene rCH 1.062 ±0.001 1.063 0.000 4 5
CH2NN diazomethane rHC 1.075   1.076 0.001 1 4
C2H2 Acetylene rCH 1.063   1.064 0.001 1 3
CH3CH(NH2)COOH Alanine rCC 1.544   1.545 0.001 3 4
FNO2 Nitryl fluoride rNF 1.467 ±0.015 1.468 0.001 1 2
C2H5F fluoroethane rCH 1.091 ±0.007 1.092 0.001 2 6
CH3NH2 methyl amine rNH 1.018 ±0.001 1.020 0.002 2 6
C2H5F fluoroethane rCH 1.090 ±0.007 1.092 0.002 2 7
SiH2Cl2 dichlorosilane rSiH 1.480 ±0.015 1.484 0.004 1 2
CH3I methyl iodide rCH 1.084 ±0.003 1.089 0.005 1 3
C2 Carbon diatomic rC=C 1.243   1.247 0.005 1 2
C8H8 cyclooctatetraene rCH 1.079 ±0.001 1.085 0.005 1 9
CH3OCl methyl hypochlorite rHC 1.086 ±0.018 1.091 0.005 3 5
C2H2 Acetylene rC#C 1.203   1.208 0.006 1 2
CH3Br methyl bromide rCH 1.082 ±0.001 1.088 0.006 1 3
BN boron nitride rB=N 1.325   1.332 0.007 1 2
CH2NN diazomethane rC=N 1.300   1.307 0.007 1 2
NH2CONH2 Urea rNH 0.998   1.005 0.007 4 8
H2 Hydrogen diatomic rHH 0.741   0.749 0.008 1 2
CH4 Methane rCH 1.087 ±0.001 1.095 0.008 1 2
CH2NN diazomethane rN=N 1.139   1.148 0.009 2 3
BrF5 bromine pentafluoride rFBr 1.774 ±0.003 1.783 0.009 1 3
CH3NH2 methyl amine rCH 1.093 ±0.000 1.102 0.009 1 3
C5H8 Ethenylcyclopropane rCC 1.475   1.484 0.009 1 2
CH3CH2CHO Propanal rCC 1.509   1.519 0.010 2 3
CH2CHCHO Acrolein rC=O 1.219 ±0.005 1.229 0.010 1 4
C4H6 Bicyclo[1.1.0]butane rCC 1.497   1.508 0.011 1 2
CHF2Cl difluorochloromethane rCF 1.350 ±0.010 1.361 0.011 1 4
BH3 boron trihydride rBH 1.190   1.201 0.011 1 2
CH3NC methyl isocyanide rC#N 1.166 ±0.003 1.178 0.012 2 3
CN- cyanide anion rC#N 1.177 ±0.004 1.190 0.013 1 2
NO+ nitric oxide cation rN=O 1.066   1.079 0.013 1 2
N2 Nitrogen diatomic rN#N 1.098   1.111 0.014 1 2
C8H8 cyclooctatetraene rCC 1.470 ±0.001 1.484 0.014 1 5
CF3COOH trifluoroacetic acid rC=O 1.192 ±0.003 1.207 0.015 2 4
CH2FCl fluorochloromethane rCF 1.370 ±0.001 1.386 0.016 1 2
CH2CHCHO Acrolein rCC 1.470 ±0.003 1.486 0.016 1 2
CH2CHCH2CH3 1-Butene rCC 1.536   1.553 0.017 1 2
C2H Ethynyl radical rCH 1.047   1.063 0.017 1 3
C6H5OCH3 Anisole rCO 1.433   1.450 0.017 7 8
CH3CH2CHO Propanal rCC 1.523   1.540 0.017 1 2
HClO4 perchloric acid rHO 0.980   0.999 0.019 3 6
C3H5 Allyl radical rCH 1.069   1.088 0.019 1 2
CH3NH2 methyl amine rCN 1.471 ±0.003 1.492 0.021 1 2
C5H8 Cyclobutane, methylene- rCC 1.524   1.545 0.021 1 3
CO Carbon monoxide rC#O 1.128 ±0.000 1.149 0.021 1 2
CH3NC methyl isocyanide rCN 1.426 ±0.003 1.447 0.021 1 2
N2O3 Dinitrogen trioxide rN=O 1.217   1.238 0.021 2 5
HO2 Hydroperoxy radical rOH 0.971   0.994 0.023 1 3
BH Boron monohydride rBH 1.232   1.256 0.024 1 2
C6H6 Fulvene rCC 1.476 ±0.008 1.500 0.024 5 6
HS+ sulfur monohydride cation rHS 1.374   1.399 0.024 1 2
SiH4 Silane rSiH 1.480 ±0.000 1.504 0.024 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.528   1.553 0.025 1 3
C6H6 Fulvene rCC 1.470 ±0.004 1.495 0.025 1 3
CH2CHCH2CH3 1-Butene rCC 1.493   1.518 0.025 2 3
C3H6 Cyclopropane rCC 1.501   1.526 0.025 1 2
C2H5F fluoroethane rCC 1.505 ±0.007 1.530 0.025 1 2
BeO beryllium oxide rBe=O 1.331   1.356 0.026 1 2
CH3CH(NH2)COOH Alanine rCC 1.509   1.535 0.026 2 3
C2H5F fluoroethane rCF 1.398 ±0.007 1.424 0.026 1 3
BeH2 beryllium dihydride rHBe 1.326 ±0.000 1.353 0.027 1 2
CSe2 Carbon diselenide rC=Se 1.692 ±0.000 1.719 0.027 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.565   1.592 0.027 3 4
FO Oxygen monofluoride rFO 1.354   1.382 0.028 1 2
C5H7N Cyclobutanecarbonitrile rCC 1.551   1.580 0.029 3 6
C2HF3 Trifluoroethylene rCF 1.316 ±0.011 1.346 0.030 1 3
B2 Boron diatomic rBB 1.590   1.620 0.030 1 2
H2O Water rOH 0.958 ±0.000 0.988 0.031 1 2
AsH Arsenic monohydride rHAs 1.535 ±0.001 1.565 0.031 1 2
BrF3 Bromine trifluoride rFBr 1.810 ±0.000 1.841 0.031 1 3
BF3 Borane, trifluoro- rBF 1.307   1.338 0.031 1 2
HSe Selenium monohydride rHSe 1.475 ±0.010 1.508 0.033 1 2
BeH beryllium monohydride rBeH 1.343   1.377 0.034 1 2
N2O3 Dinitrogen trioxide rN=O 1.142   1.177 0.035 1 3
HOBr Hypobromous acid rOH 0.961   0.996 0.035 1 2
CH3ONO Methyl nitrite rCO 1.437   1.473 0.036 1 2
AsH3 Arsine rHAs 1.511 ±0.000 1.547 0.037 1 2
CH3ONO Methyl nitrite rN=O 1.182   1.221 0.039 6 7
ArH+ Argon hydride cation rHAr 1.292 ±0.000 1.332 0.040 1 2
N2O3 Dinitrogen trioxide rN=O 1.202   1.242 0.040 2 4
OH Hydroxyl radical rOH 0.970   1.010 0.040 1 2
DF Hydrofluoric acid-d rDF 0.917 ±0.000 0.958 0.041 1 2
CSe Carbon monoselenide rC=Se 1.676 ±0.000 1.717 0.041 1 2
HF Hydrogen fluoride rHF 0.917 ±0.000 0.958 0.042 1 2
FNO2 Nitryl fluoride rN=O 1.180 ±0.005 1.223 0.043 1 3
SiH+ silicon monohydride cation rHSi 1.504   1.548 0.044 1 2
BF Boron monofluoride rBF 1.267 ±0.000 1.311 0.045 1 2
HCl Hydrogen chloride rHCl 1.275 ±0.000 1.319 0.045 1 2
C3H3NO Oxazole rCO 1.357   1.402 0.045 1 5
CaOH Calcium monohydroxide rHO 0.930 ±0.007 0.975 0.045 2 3
HS Mercapto radical rSH 1.341   1.386 0.046 1 2
C5H8 Bicyclo[2.1.0]pentane rCC 1.507   1.553 0.046 1 2
HBr hydrogen bromide rHBr 1.414 ±0.000 1.461 0.047 1 2
SiF2 Silicon difluoride rFSi 1.590 ±0.000 1.637 0.047 1 2
F2 Fluorine diatomic rFF 1.412   1.459 0.047 1 2
SiF silicon monofluoride rSiF 1.604   1.653 0.048 1 2
GeH germylidene rHGe 1.588   1.637 0.049 1 2
SiH Silylidyne rSiH 1.520   1.570 0.050 1 2
H2CS Thioformaldehyde rC=S 1.611   1.661 0.050 1 2
Si(CH3)4 tetramethylsilane rSiC 1.875 ±0.002 1.926 0.051 1 2
SF4 Sulfur tetrafluoride rSF 1.646 ±0.003 1.697 0.051 1 2
CS carbon monosulfide rC#S 1.535   1.587 0.052 1 2
CH3ONO Methyl nitrite rNO 1.398   1.450 0.052 2 6
CH2O2 Dioxirane rOO 1.516 ±0.003 1.568 0.052 4 5
BrF5 bromine pentafluoride rFBr 1.689 ±0.008 1.742 0.053 1 2
CBr4 Carbon tetrabromide rCBr 1.942 ±0.002 1.998 0.056 1 2
Li2 Lithium diatomic rLiLi 2.673   2.731 0.058 1 2
BrF3 Bromine trifluoride rFBr 1.721   1.780 0.059 1 2
HI Hydrogen iodide rHI 1.609 ±0.000 1.670 0.061 1 2
SOF4 Sulfur tetrafluoride oxide rF-S 1.596 ±0.003 1.658 0.062 1 3
CHBr3 bromoform rCBr 1.924 ±0.005 1.989 0.065 1 3
NS+ nitrogen sulfide cation rNS 1.440   1.506 0.066 1 2
CH2Br2 dibromomethane rCBr 1.925 ±0.002 1.993 0.068 1 4
IF Iodine monofluoride rFI 1.910   1.978 0.069 1 2
CH2O2 Dioxirane rCO 1.388 ±0.004 1.457 0.069 1 4
CH3I methyl iodide rCI 2.136 ±0.002 2.206 0.070 1 2
MgH+ magnesium monohydride cation rHMg 1.652   1.723 0.071 1 2
BrF Bromine monofluoride rFBr 1.759 ±0.000 1.830 0.071 1 2
HOBr Hypobromous acid rBrO 1.834   1.906 0.072 2 3
NaCl Sodium Chloride rNaCl 2.361 ±0.000 2.434 0.073 1 2
LiBr Lithium Bromide rLiBr 2.170 ±0.000 2.244 0.073 1 2
CuCl Copper monochloride rCuCl 2.051 ±0.000 2.125 0.074 1 2
LiH Lithium Hydride rLiH 1.595 ±0.000 1.669 0.075 1 2
NaH sodium hydride rNaH 1.887 ±0.000 1.962 0.075 1 2
CH3Br methyl bromide rCBr 1.934 ±0.000 2.009 0.075 1 2
ClOF3 Chlorine trifluoride oxide rFCl 1.713 ±0.003 1.790 0.077 1 4
As2 Arsenic diatomic rAs#As 2.103   2.180 0.078 1 2
NaBr Sodium Bromide rNaBr 2.502 ±0.000 2.581 0.079 1 2
O2+ diatomic oxygen cation rOO 1.116   1.196 0.080 1 2
SiC silicon monocarbide rC-Si 1.722   1.803 0.082 1 2
AlC Aluminum carbide rC=Al 1.955   2.037 0.082 1 2
F2SO Thionyl Fluoride rFS 1.585 ±0.000 1.669 0.083 1 3
HO2 Hydroperoxy radical rOO 1.331   1.416 0.086 1 2
KF Potassium Fluoride rKF 2.171 ±0.000 2.259 0.088 1 2
P2 Phosphorus diatomic rP#P 1.893   1.982 0.089 1 2
AlN Aluminum nitride rN#Al 1.786   1.876 0.089 1 2
O2 Oxygen diatomic rO=O 1.208   1.298 0.090 1 2
PF+ phosphorus monofluoride cation rFP 1.500   1.593 0.093 1 2
SOF4 Sulfur tetrafluoride oxide rF-S 1.539 ±0.003 1.632 0.093 1 5
SF Monosulfur monofluoride rSF 1.599   1.693 0.094 1 2
OH- hydroxide anion rOH 0.964   1.058 0.094 1 2
PO2 Phosphorus dioxide rP=O 1.467   1.562 0.096 1 2
SF4 Sulfur tetrafluoride rSF 1.545 ±0.003 1.642 0.097 1 4
BrO Bromine monoxide rOBr 1.718   1.816 0.098 1 2
LiCl lithium chloride rLiCl 2.021 ±0.000 2.120 0.100 1 2
CaOH Calcium monohydroxide rOCa 1.976 ±0.004 2.077 0.101 1 2
SOCl2 thionyl chloride rS=O 1.443 ±0.006 1.544 0.101 1 2
NaLi lithium sodium rLiNa 2.889   2.991 0.102 1 2
PO- phosphorus monoxide anion rOP 1.540   1.653 0.113 1 2
SO Sulfur monoxide rS=O 1.481   1.596 0.114 1 2
SO+ sulfur monoxide cation rO=S 1.424   1.541 0.117 1 2
F2SO Thionyl Fluoride rO=S 1.413 ±0.000 1.534 0.121 1 2
SiP Silicon monophosphide rSiP 2.078 ±0.002 2.201 0.123 1 2
ClOF3 Chlorine trifluoride oxide rFCl 1.603 ±0.004 1.728 0.125 1 3
GeCl Germanium monochloride rCl-Ge 2.164 ±0.000 2.305 0.141 1 2
HClO4 perchloric acid rOCl 1.641 ±0.002 1.782 0.141 1 3
CH2FCl fluorochloromethane rCCl 1.762 ±0.000 1.906 0.144 1 3
CHF2Cl difluorochloromethane rCCl 1.747 ±0.010 1.894 0.147 1 3
SiH2Cl2 dichlorosilane rSiCl 2.033 ±0.003 2.183 0.150 1 4
GaAs Gallium arsenide rGa#As 2.530 ±0.020 2.681 0.151 1 2
NS Mononitrogen monosulfide rNS 1.497 ±0.000 1.654 0.157 1 2
AlCl Aluminum monochloride rAlCl 2.130 ±0.000 2.291 0.161 1 2
KH Potassium hydride rHK 2.243 ±0.001 2.405 0.163 1 2
CCl2 dichloromethylene rCCl 1.711   1.885 0.174 1 2
S2+ sulfur dimer cation rS=S 1.825 ±0.010 2.007 0.182 1 2
As4 Arsenic tetramer rAsAs 2.435   2.622 0.187 1 2
CaH Calcium monohydride rHCa 2.003 ±0.000 2.208 0.206 1 2
KCl Potassium Chloride rKCl 2.667 ±0.000 2.877 0.211 1 2
PS phosphorus sulfide rP=S 1.900   2.121 0.221 1 2
SCl sulfur monochloride rSCl 1.975   2.197 0.222 1 2
Br2 Bromine diatomic rBrBr 2.281   2.504 0.223 1 2
CaF Calcium monofluoride rFCa 1.967 ±0.001 2.195 0.228 1 2
ICl Iodine monochloride rCl-I 2.321 ±0.000 2.549 0.229 1 2
IBr Iodine monobromide rBr-I 2.469 ±0.000 2.706 0.237 1 2
BrCl Bromine monochloride rClBr 2.136 ±0.000 2.379 0.243 1 2
HClO4 perchloric acid rO=Cl 1.414 ±0.001 1.660 0.246 1 2
HClO4 perchloric acid rO=Cl 1.404 ±0.001 1.657 0.253 1 4
CaCl calcium monochloride rClCa 2.437   2.699 0.262 1 2
I2 Iodine diatomic rII 2.665   2.938 0.272 1 2
Cl2 Chlorine diatomic rClCl 1.988   2.265 0.277 1 2
Cl2+ chlorine diatomic cation rClCl 1.892   2.195 0.303 1 2
C3H3NO Oxazole rCH 1.075   1.423 0.348 3 4
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 ±0.040 2.396 0.356 1 3
CH3OC2H5 Ethane, methoxy- rCH 1.087   1.451 0.364 1 2
239 molecules.