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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/cc-pVQZ

17 02 03 13 22
Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C3H3NO Isoxazole rCH 1.075 1.409 0.334
C4H6 1-Methylcyclopropene rCH 1.085 4.202 3.117
C4H6 1-Methylcyclopropene rCH 1.087 3.404 2.317
C4H6 1-Methylcyclopropene rCC 1.476 2.248 0.772
C4H6 1-Methylcyclopropene rCH 1.087 1.824 0.737
C4H6 1-Methylcyclopropene rCH 1.098 1.770 0.672
C4H6 1-Methylcyclopropene rCH 1.098 1.753 0.655
C4H6 1-Methylcyclopropene rCH 1.070 1.506 0.436
C4H6 1-Methylcyclopropene rCC 1.515 1.085 -0.430
C4H6 1-Methylcyclopropene rCC 1.300 1.508 0.208
FO Oxygen monofluoride rFO 1.354 1.499 0.145
Ar2 Argon diatomic rArAr 3.758 3.870 0.112
Be2 Beryllium diatomic rBeBe 2.460 2.733 0.273
S4 Sulfur tetramer rSS 2.155 2.585 0.430
AlP Aluminum monophosphide rAlP 2.400 2.190 -0.210
AlP Aluminum monophosphide rAlP 2.220 2.051 -0.169
Mg2 Magnesium diatomic rMgMg 3.891 4.188 0.297
Al2 Aluminum diatomic rAlAl 2.701 2.463 -0.238
18 molecules.