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Bad Calculated Bond Lengths

List of molecules with calculated bond lengths that differ by more than 0.050 Å from experimental bond lengths.

Calculated at B97D3/6-31+G**

17 02 03 13 22
Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
H2ONH3 Water Ammonia Dimer rNH 2.983 2.057 -0.926
C4H4N2O2 Uracil rNH 0.836 1.013 0.177
C4H4N2O2 Uracil rCH 0.931 1.084 0.153
C4H4N2O2 Uracil rNH 0.877 1.016 0.139
C4H4N2O2 Uracil rCH 0.957 1.088 0.131
CH2BrCl Methane, bromochloro- rCBr 1.928 1.090 -0.838
CH2BrCl Methane, bromochloro- rHC 1.115 1.787 0.672
CH2BrCl Methane, bromochloro- rCCl 1.755 1.090 -0.665
C(CH3)3NH2 2-Propanamine, 2-methyl- rNH 1.048 1.482 0.434
C4H10O Ethanol, 1,1-dimethyl- rCH 1.117 2.444 1.327
C4H10O Ethanol, 1,1-dimethyl- rCO 1.446 2.188 0.742
C4H8S Thiophene, tetrahydro- rCC 1.532 3.319 1.787
C4H8S Thiophene, tetrahydro- rCH 1.117 1.850 0.733
C4H8S Thiophene, tetrahydro- rCS 1.835 2.172 0.337
C2F4 Tetrafluoroethylene rCF 1.319 1.425 0.106
C2Cl4 Tetrachloroethylene rCCl 1.718 1.579 -0.139
C3H3NO Isoxazole rCH 1.075 1.427 0.352
C2H4O3 trioxolane124 rCN 1.303 1.422 0.119
CF3CN Acetonitrile, trifluoro- rCF 1.328 1.430 0.101
CH3CF3 Ethane, 1,1,1-trifluoro- rCF 1.340 1.666 0.326
C4H10O Methyl propyl ether rCC 1.530 1.100 -0.430
C4H10O Methyl propyl ether rCH 1.099 1.420 0.321
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804 1.635 -0.169
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804 1.635 -0.169
CaO Calcium monoxide rOCa 1.822 2.061 0.239
C4H6 1-Methylcyclopropene rCH 1.085 4.240 3.155
C4H6 1-Methylcyclopropene rCH 1.087 3.429 2.342
C4H6 1-Methylcyclopropene rCC 1.476 2.270 0.794
C4H6 1-Methylcyclopropene rCH 1.087 1.836 0.749
C4H6 1-Methylcyclopropene rCH 1.098 1.788 0.690
C4H6 1-Methylcyclopropene rCH 1.098 1.767 0.669
C4H6 1-Methylcyclopropene rCH 1.070 1.512 0.442
C4H6 1-Methylcyclopropene rCC 1.515 1.100 -0.415
C4H6 1-Methylcyclopropene rCC 1.300 1.512 0.212
CH3SO2NH2 methanesulfonamide rCN 1.207 1.719 0.512
KCl Potassium Chloride rKCl 2.667 2.768 0.102
ClFO3 Perchloryl fluoride rFCl 1.598 1.707 0.109
H2SO4 Sulfuric acid rOH 0.970 2.849 1.879
SiF4 Silicon tetrafluoride rSiF 1.554 1.713 0.159
AsF5 Arsenic pentafluoride rAsF 1.711 1.922 0.211
AsF5 Arsenic pentafluoride rAsF 1.656 1.834 0.178
ClF3 Chlorine trifluoride rFCl 1.597 1.795 0.199
He2+ helium diatomic cation rHeHe 1.081 1.190 0.109
N2O4 Dinitrogen tetroxide rNN 1.782 1.907 0.125
LiK Lithium Potassium rLiK 3.270 3.385 0.115
NO3 Nitrogen trioxide rNO 1.238 1.348 0.111
CaOH Calcium monohydroxide rOCa 1.976 2.124 0.148
Na2Cl2 Disodium dichloride rNaCl 2.584 3.266 0.682
ClOOCl Dichlorine dioxide rOCl 1.704 1.574 -0.131
NaO sodium monoxide rONa 2.052 1.866 -0.186
Ar2 Argon diatomic rArAr 3.758 4.115 0.357
AlCl Aluminum monochloride rAlCl 2.130 2.420 0.289
B2Cl4 Diboron tetrachloride rBB 1.702 1.543 -0.159
CaF Calcium monofluoride rFCa 1.967 2.280 0.313
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.300 0.260
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.096 -0.144
HSSSH trisulfane rHS 1.344 2.105 0.761
B2F4 Diboron tetrafluoride rBB 1.720 1.511 -0.209
B2F4 Diboron tetrafluoride rBF 1.317 1.444 0.127
Li2+ lithium diatomic cation rLiLi 3.112 2.966 -0.146
Be2 Beryllium diatomic rBeBe 2.460 1.939 -0.521
B2 Boron diatomic rBB 1.590 1.459 -0.131
CaH Calcium monohydride rCaH 2.003 2.158 0.155
CaCl calcium monochloride rClCa 2.437 2.604 0.168
FSN Thiazyl fluoride rFS 1.643 1.743 0.100
S4 Sulfur tetramer rSS 2.155 2.426 0.271
CaS Calcium sulfide rSCa 2.318 2.505 0.188
AlP Aluminum monophosphide rAlP 2.400 2.247 -0.153
K2 Potassium diatomic rKK 3.905 4.086 0.181
Mg2 Magnesium diatomic rMgMg 3.891 2.683 -1.208
CaC Calcium monocarbide rCCa 2.302 2.476 0.174
71 molecules.