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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 MP3/6-31+G**

17 02 03 13 22
Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
H2ONH3 Water Ammonia Dimer rNH 2.983 2.072 -0.911
C4H4N2O2 Uracil rNH 0.836 1.004 0.168
C4H4N2O2 Uracil rCH 0.931 1.076 0.145
C4H4N2O2 Uracil rNH 0.877 1.007 0.130
C4H4N2O2 Uracil rCH 0.957 1.080 0.123
C(CH3)3NH2 2-Propanamine, 2-methyl- rNH 1.048 1.468 0.420
C4H10O Ethanol, 1,1-dimethyl- rCH 1.117 2.421 1.304
C4H10O Ethanol, 1,1-dimethyl- rCO 1.446 2.166 0.720
C2F4 Tetrafluoroethylene rCF 1.319 1.425 0.106
C2Cl4 Tetrachloroethylene rCCl 1.718 1.579 -0.139
C3H3NO Isoxazole rCH 1.075 1.428 0.353
C2H4O3 trioxolane124 rCN 1.303 1.414 0.111
CF3CN Acetonitrile, trifluoro- rCF 1.328 1.429 0.101
CH3CF3 Ethane, 1,1,1-trifluoro- rCF 1.340 1.664 0.324
C4H10O Methyl propyl ether rCC 1.530 1.091 -0.439
C4H10O Methyl propyl ether rCH 1.099 1.414 0.315
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804 1.527 -0.277
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804 1.529 -0.275
CaO Calcium monoxide rOCa 1.822 2.188 0.366
CF3 Trifluoromethyl radical rCF 1.318 1.430 0.112
HOCO+ Hydrocarboxyl cation rCO 1.209 1.337 0.129
C4H6 1-Methylcyclopropene rCH 1.085 4.209 3.124
C4H6 1-Methylcyclopropene rCH 1.087 3.423 2.336
C4H6 1-Methylcyclopropene rCC 1.476 2.259 0.783
C4H6 1-Methylcyclopropene rCH 1.087 1.819 0.732
C4H6 1-Methylcyclopropene rCH 1.098 1.773 0.675
C4H6 1-Methylcyclopropene rCH 1.098 1.759 0.661
C4H6 1-Methylcyclopropene rCH 1.070 1.509 0.439
C4H6 1-Methylcyclopropene rCC 1.515 1.087 -0.428
C4H6 1-Methylcyclopropene rCC 1.300 1.513 0.213
CH3SO2NH2 methanesulfonamide rCN 1.207 1.674 0.467
H2SO4 Sulfuric acid rOH 0.970 2.860 1.890
PF3 Phosphorus trifluoride rFP 1.561 1.675 0.114
SiF4 Silicon tetrafluoride rSiF 1.554 1.713 0.159
AsF5 Arsenic pentafluoride rAsF 1.711 1.923 0.212
AsF5 Arsenic pentafluoride rAsF 1.656 1.834 0.178
CaBr Calcium monobromide rCaBr 2.594 2.730 0.137
N2O4 Dinitrogen tetroxide rNN 1.782 1.676 -0.106
NO3 Nitrogen trioxide rNO 1.238 1.379 0.141
GaP Gallium monophosphide rPGa 2.450 2.223 -0.227
Ne2 Neon diatomic rNeNe 3.100 2.987 -0.113
ArH+ Argon hydride cation rArH 1.292 1.441 0.149
Na2Cl2 Disodium dichloride rNaCl 2.584 3.259 0.675
ClOOCl Dichlorine dioxide rOCl 1.704 1.578 -0.127
CP Carbon monophosphide rCP 1.562 1.680 0.117
NaO sodium monoxide rONa 2.052 1.862 -0.190
Ar2 Argon diatomic rArAr 3.758 4.068 0.310
Ar2+ Argon diatomic cation rArAr 2.320 2.510 0.190
AlCl Aluminum monochloride rAlCl 2.130 2.420 0.289
B2Cl4 Diboron tetrachloride rBB 1.702 1.550 -0.152
CaF Calcium monofluoride rFCa 1.967 2.280 0.313
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.267 0.227
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.079 -0.161
HSSSH trisulfane rHS 1.344 2.071 0.728
Be2 Beryllium diatomic rBeBe 2.460 1.939 -0.521
B2 Boron diatomic rBB 1.590 1.443 -0.147
CaH Calcium monohydride rCaH 2.003 2.108 0.106
CaCl calcium monochloride rClCa 2.437 2.559 0.122
CaS Calcium sulfide rSCa 2.318 2.518 0.200
AlP Aluminum monophosphide rAlP 2.400 2.217 -0.183
AlP Aluminum monophosphide rAlP 2.220 2.068 -0.152
K2 Potassium diatomic rKK 3.905 4.075 0.170
Mg2 Magnesium diatomic rMgMg 3.891 2.683 -1.208
Al2 Aluminum diatomic rAlAl 2.701 2.514 -0.187
CaC Calcium monocarbide rCCa 2.302 2.430 0.129
65 molecules.