return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Geometry > Bad Calculations > Bad Calculated Bond Lengths OR Resources > Bad Calculations > Geometry > Bad Calculated Bond Lengths

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 MP2/6-31G**

17 02 03 13 22
Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C3H3NO Isoxazole rCH 1.075 1.414 0.339
C2H4O3 trioxolane124 rCN 1.303 2.193 0.889
C4H10O Methyl propyl ether rCC 1.530 1.090 -0.440
C4H10O Methyl propyl ether rCH 1.099 1.415 0.316
CaO Calcium monoxide rOCa 1.822 2.042 0.220
CuO Copper Monoxide rCuO 1.724 1.610 -0.114
C4H6 1-Methylcyclopropene rCH 1.085 4.215 3.130
C4H6 1-Methylcyclopropene rCH 1.087 3.416 2.329
C4H6 1-Methylcyclopropene rCC 1.476 2.254 0.778
C4H6 1-Methylcyclopropene rCH 1.087 1.819 0.732
C4H6 1-Methylcyclopropene rCH 1.098 1.772 0.674
C4H6 1-Methylcyclopropene rCH 1.098 1.757 0.659
C4H6 1-Methylcyclopropene rCH 1.070 1.507 0.437
C4H6 1-Methylcyclopropene rCC 1.515 1.088 -0.427
C4H6 1-Methylcyclopropene rCC 1.300 1.507 0.207
CH3SO2NH2 methanesulfonamide rCN 1.207 1.681 0.475
CaBr Calcium monobromide rCaBr 2.594 2.711 0.117
LiK Lithium Potassium rLiK 3.270 3.393 0.123
FO Oxygen monofluoride rFO 1.354 1.506 0.152
GaP Gallium monophosphide rPGa 2.450 2.219 -0.231
Ne2 Neon diatomic rNeNe 3.100 2.593 -0.507
Cu2 Copper diatomic rCuCu 2.220 2.029 -0.191
NaO sodium monoxide rONa 2.052 1.943 -0.109
Ar2 Argon diatomic rArAr 3.758 4.178 0.420
Ar2+ Argon diatomic cation rArAr 2.320 2.518 0.198
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.265 0.225
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.078 -0.162
HSSSH trisulfane rHS 1.344 2.068 0.725
CrH Chromium hydride rHCr 1.655 1.778 0.123
Li2 Lithium diatomic rLiLi 2.673 2.782 0.109
Be2 Beryllium diatomic rBeBe 2.460 3.929 1.469
CaH Calcium monohydride rCaH 2.003 2.112 0.109
FOO Dioxygen monofluoride radical rFO 1.649 1.383 -0.266
CaCl calcium monochloride rClCa 2.437 2.566 0.129
S4 Sulfur tetramer rSS 2.155 2.850 0.695
CaS Calcium sulfide rSCa 2.318 2.515 0.198
AlP Aluminum monophosphide rAlP 2.400 2.201 -0.199
AlP Aluminum monophosphide rAlP 2.220 2.053 -0.167
K2 Potassium diatomic rKK 3.905 4.066 0.161
Mg2 Magnesium diatomic rMgMg 3.891 2.567 -1.324
Al2 Aluminum diatomic rAlAl 2.701 2.479 -0.222
CaC Calcium monocarbide rCCa 2.302 2.410 0.108
42 molecules.