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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 CCSD(T)/6-31G*

17 02 03 13 22
Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
H2ONH3 Water Ammonia Dimer rNH 2.983 2.021 -0.962
CH3CH2OH Ethanol rOH 0.971 3.340 2.369
CH3NHCH3 Dimethylamine rCH 1.084 3.367 2.283
C3H3NO Isoxazole rCH 1.075 1.429 0.354
C3H8O2 1,3-Propanediol rOH 0.980 3.561 2.581
C3H8O2 1,3-Propanediol rCO 1.410 2.153 0.743
C3H8O2 1,3-Propanediol rCH 1.140 1.523 0.383
C4H10O Methyl propyl ether rCC 1.530 1.099 -0.431
C4H10O Methyl propyl ether rCH 1.099 1.419 0.320
CaO Calcium monoxide rOCa 1.822 1.979 0.157
HCO Formyl radical rCH 1.080 1.193 0.113
CH3SO2NH2 methanesulfonamide rCN 1.207 1.692 0.485
H2SO4 Sulfuric acid rOH 0.970 2.858 1.888
KH Potassium hydride rKH 2.243 2.347 0.105
PF3 Phosphorus trifluoride rFP 1.561 1.390 -0.171
GaP Gallium monophosphide rPGa 2.450 2.253 -0.197
Ne2 Neon diatomic rNeNe 3.100 2.595 -0.505
Ar2 Argon diatomic rArAr 3.758 4.195 0.437
Ar2+ Argon diatomic cation rArAr 2.320 2.526 0.206
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.272 0.232
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.084 -0.156
HSSSH trisulfane rHS 1.344 2.086 0.742
CrH Chromium hydride rHCr 1.655 1.812 0.157
Be2 Beryllium diatomic rBeBe 2.460 4.434 1.974
CaH Calcium monohydride rCaH 2.003 2.154 0.152
CaCl calcium monochloride rClCa 2.437 2.569 0.132
S4 Sulfur tetramer rSS 2.155 2.291 0.136
CaS Calcium sulfide rSCa 2.318 2.528 0.211
HBO Boron hydride oxide rBO 1.200 2.391 1.191
AlP Aluminum monophosphide rAlP 2.400 2.233 -0.167
AlP Aluminum monophosphide rAlP 2.220 2.104 -0.116
K2 Potassium diatomic rKK 3.905 4.111 0.206
Mg2 Magnesium diatomic rMgMg 3.891 4.761 0.870
Al2 Aluminum diatomic rAlAl 2.701 2.492 -0.209
34 molecules.