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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 BLYP/6-31G*

17 02 03 13 22
Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
H2ONH3 Water Ammonia Dimer rNH 2.983 2.063 -0.920
C4H4N2O2 Uracil rNH 0.836 1.017 0.181
C4H4N2O2 Uracil rCH 0.931 1.088 0.157
C4H4N2O2 Uracil rNH 0.877 1.020 0.143
C4H4N2O2 Uracil rCH 0.957 1.092 0.135
C2H6O2S Dimethyl sulfone rSO 1.431 1.647 0.216
C2H6O2S Dimethyl sulfone rCS 1.777 1.580 -0.197
C(CH3)3NH2 2-Propanamine, 2-methyl- rNH 1.048 1.488 0.440
C4H10O Ethanol, 1,1-dimethyl- rCH 1.117 2.455 1.338
C4H10O Ethanol, 1,1-dimethyl- rCO 1.446 2.201 0.755
C4H8S Thiophene, tetrahydro- rCC 1.532 3.346 1.814
C4H8S Thiophene, tetrahydro- rCH 1.117 1.865 0.748
C4H8S Thiophene, tetrahydro- rCS 1.835 2.183 0.348
C2F4 Tetrafluoroethylene rCF 1.319 1.425 0.106
C2Cl4 Tetrachloroethylene rCCl 1.718 1.579 -0.139
C3H3NO Isoxazole rCH 1.075 1.431 0.356
C2H4O3 trioxolane124 rCN 1.303 1.429 0.126
CF3CN Acetonitrile, trifluoro- rCF 1.328 1.429 0.101
CH3CF3 Ethane, 1,1,1-trifluoro- rCF 1.340 1.666 0.326
C4H10O Methyl propyl ether rCC 1.530 1.104 -0.426
C4H10O Methyl propyl ether rCH 1.099 1.426 0.327
CaO Calcium monoxide rOCa 1.822 2.063 0.240
CFCl chlorofluoromethylene rCCl 1.714 1.830 0.116
CF3 Trifluoromethyl radical rCF 1.318 1.432 0.114
HOCO+ Hydrocarboxyl cation rCO 1.209 1.345 0.137
C4H6 1-Methylcyclopropene rCH 1.085 4.253 3.168
C4H6 1-Methylcyclopropene rCH 1.087 3.456 2.369
C4H6 1-Methylcyclopropene rCC 1.476 2.283 0.807
C4H6 1-Methylcyclopropene rCH 1.087 1.839 0.752
C4H6 1-Methylcyclopropene rCH 1.098 1.791 0.693
C4H6 1-Methylcyclopropene rCH 1.098 1.772 0.674
C4H6 1-Methylcyclopropene rCH 1.070 1.526 0.456
C4H6 1-Methylcyclopropene rCC 1.515 1.104 -0.411
C4H6 1-Methylcyclopropene rCC 1.300 1.520 0.220
CH3SO2NH2 methanesulfonamide rCN 1.207 1.745 0.538
ClFO3 Perchloryl fluoride rFCl 1.598 1.707 0.109
H2SO4 Sulfuric acid rOH 0.970 2.914 1.944
PF3 Phosphorus trifluoride rFP 1.561 1.686 0.125
SiF4 Silicon tetrafluoride rSiF 1.554 1.713 0.159
AsF5 Arsenic pentafluoride rAsF 1.711 1.919 0.208
AsF5 Arsenic pentafluoride rAsF 1.656 1.836 0.180
ClF3 Chlorine trifluoride rFCl 1.597 1.701 0.105
CaBr Calcium monobromide rCaBr 2.594 2.716 0.122
N2O4 Dinitrogen tetroxide rNN 1.782 1.895 0.113
NO3 Nitrogen trioxide rNO 1.238 1.358 0.120
GaP Gallium monophosphide rPGa 2.450 2.262 -0.188
C2 Carbon diatomic rCC 1.243 1.374 0.131
CaOH Calcium monohydroxide rOCa 1.976 2.090 0.114
Ne2 Neon diatomic rNeNe 3.100 2.989 -0.111
Cu2 Copper diatomic rCuCu 2.220 2.079 -0.141
ArH+ Argon hydride cation rArH 1.292 1.441 0.149
Na2Cl2 Disodium dichloride rNaCl 2.584 3.243 0.659
ClOOCl Dichlorine dioxide rOCl 1.704 1.576 -0.129
NaO sodium monoxide rONa 2.052 1.851 -0.201
Ar2 Argon diatomic rArAr 3.758 4.301 0.543
Ar2+ Argon diatomic cation rArAr 2.320 2.726 0.406
ClNO2 Nitryl chloride rNCl 1.840 1.956 0.116
AlCl Aluminum monochloride rAlCl 2.130 2.420 0.289
B2Cl4 Diboron tetrachloride rBB 1.702 1.539 -0.163
CaF Calcium monofluoride rFCa 1.967 2.280 0.313
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.309 0.269
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.104 -0.136
HSSSH trisulfane rHS 1.344 2.102 0.758
B2F4 Diboron tetrafluoride rBB 1.720 1.506 -0.214
B2F4 Diboron tetrafluoride rBF 1.317 1.442 0.125
Li2+ lithium diatomic cation rLiLi 3.112 2.939 -0.172
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 2.141 0.138
CaCl calcium monochloride rClCa 2.437 2.583 0.146
S4 Sulfur tetramer rSS 2.155 2.682 0.527
CaS Calcium sulfide rSCa 2.318 2.511 0.193
K2 Potassium diatomic rKK 3.905 4.044 0.139
Mg2 Magnesium diatomic rMgMg 3.891 2.683 -1.208
ClOF3 Chlorine trifluoride oxide rFCl 1.603 1.732 0.129
Al2 Aluminum diatomic rAlAl 2.701 2.553 -0.148
CaC Calcium monocarbide rCCa 2.302 2.459 0.157
77 molecules.