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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 MP2/Def2TZVPP

17 02 03 13 22
Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
H2ONH3 Water Ammonia Dimer rNH 2.983 2.065 -0.918
C4H4N2O2 Uracil rNH 0.836 1.006 0.170
C4H4N2O2 Uracil rCH 0.931 1.076 0.145
C4H4N2O2 Uracil rNH 0.877 1.011 0.134
C4H4N2O2 Uracil rCH 0.957 1.079 0.122
C6H12O hexanal rCC 1.420 1.522 0.102
C(CH3)3NH2 2-Propanamine, 2-methyl- rNH 1.048 1.465 0.417
C4H10O Ethanol, 1,1-dimethyl- rCH 1.117 2.419 1.302
C4H10O Ethanol, 1,1-dimethyl- rCO 1.446 2.160 0.714
C4H8S Thiophene, tetrahydro- rCC 1.532 3.276 1.744
C4H8S Thiophene, tetrahydro- rCH 1.117 1.825 0.708
C4H8S Thiophene, tetrahydro- rCS 1.835 2.154 0.319
C2F4 Tetrafluoroethylene rCF 1.319 1.425 0.106
C2Cl4 Tetrachloroethylene rCCl 1.718 1.579 -0.139
C3H3NO Isoxazole rCH 1.075 1.411 0.336
C2H4O3 trioxolane124 rCN 1.303 1.410 0.107
CH3CF3 Ethane, 1,1,1-trifluoro- rCF 1.340 1.664 0.324
C4H10O Methyl propyl ether rCC 1.530 1.090 -0.440
C4H10O Methyl propyl ether rCH 1.099 1.410 0.311
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804 1.635 -0.169
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804 1.636 -0.168
CaO Calcium monoxide rOCa 1.822 1.934 0.111
KOH Potassium hydroxide rOK 2.212 2.330 0.118
CF3 Trifluoromethyl radical rCF 1.318 1.430 0.112
HOCO+ Hydrocarboxyl cation rCO 1.209 1.348 0.140
C4H6 1-Methylcyclopropene rCH 1.085 4.208 3.123
C4H6 1-Methylcyclopropene rCH 1.087 3.408 2.321
C4H6 1-Methylcyclopropene rCC 1.476 2.251 0.775
C4H6 1-Methylcyclopropene rCH 1.087 1.825 0.738
C4H6 1-Methylcyclopropene rCH 1.098 1.772 0.674
C4H6 1-Methylcyclopropene rCH 1.098 1.755 0.657
C4H6 1-Methylcyclopropene rCH 1.070 1.508 0.438
C4H6 1-Methylcyclopropene rCC 1.515 1.086 -0.429
C4H6 1-Methylcyclopropene rCC 1.300 1.510 0.210
CH3SO2NH2 methanesulfonamide rCN 1.207 1.650 0.443
KCl Potassium Chloride rKCl 2.667 2.825 0.158
H2SO4 Sulfuric acid rOH 0.970 2.825 1.855
KBr Potassium Bromide rKBr 2.821 2.979 0.158
O2+ diatomic oxygen cation rOO 1.116 1.244 0.127
PF3 Phosphorus trifluoride rFP 1.561 1.671 0.110
SiF4 Silicon tetrafluoride rSiF 1.554 1.713 0.159
AsF5 Arsenic pentafluoride rAsF 1.711 1.921 0.210
AsF5 Arsenic pentafluoride rAsF 1.656 1.835 0.179
KF Potassium Fluoride rKF 2.171 2.288 0.116
ClF3 Chlorine trifluoride rFCl 1.597 1.717 0.120
LiK Lithium Potassium rLiK 3.270 3.417 0.147
NO3 Nitrogen trioxide rNO 1.238 1.379 0.141
VO Vanadium monoxide rVO 1.589 1.441 -0.148
GaP Gallium monophosphide rPGa 2.450 2.041 -0.409
CaOH Calcium monohydroxide rOCa 1.976 2.133 0.157
Na2Cl2 Disodium dichloride rNaCl 2.584 3.258 0.674
ClOOCl Dichlorine dioxide rOCl 1.704 1.573 -0.131
CP Carbon monophosphide rCP 1.562 1.775 0.213
NaLi lithium sodium rLiNa 2.889 2.990 0.101
NaO sodium monoxide rONa 2.052 1.867 -0.184
Ar2 Argon diatomic rArAr 3.758 3.964 0.206
Ar2+ Argon diatomic cation rArAr 2.320 2.452 0.132
AlCl Aluminum monochloride rAlCl 2.130 2.420 0.289
B2Cl4 Diboron tetrachloride rBB 1.702 1.551 -0.151
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.278 0.238
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.081 -0.159
HSSSH trisulfane rHS 1.344 2.052 0.709
B2F4 Diboron tetrafluoride rBB 1.720 1.503 -0.217
B2F4 Diboron tetrafluoride rBF 1.317 1.440 0.123
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 1.439 -0.151
SiF3 Silicon trifluoride radical rFSi 1.565 1.709 0.144
S4 Sulfur tetramer rSS 2.155 2.590 0.435
AlP Aluminum monophosphide rAlP 2.260 2.062 -0.198
AlP Aluminum monophosphide rAlP 2.400 2.209 -0.191
Na2 Sodium diatomic rNaNa 3.079 3.189 0.110
K2 Potassium diatomic rKK 3.905 4.149 0.244
Mg2 Magnesium diatomic rMgMg 3.891 2.683 -1.208
Al2 Aluminum diatomic rAlAl 2.701 2.501 -0.200
75 molecules.