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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-pVTZ

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.209 3.124
C4H6 1-Methylcyclopropene rCH 1.087 3.410 2.323
C4H6 1-Methylcyclopropene rCC 1.476 2.251 0.775
C4H6 1-Methylcyclopropene rCH 1.087 1.824 0.737
CH3CH2SH ethanethiol rCH 1.095 1.823 0.728
CH3CH2SH ethanethiol rCH 1.095 1.822 0.727
CH3CH2SH ethanethiol rCH 1.095 1.822 0.727
CH3CH2SH ethanethiol rCH 1.095 1.822 0.727
CH3CH2SH ethanethiol rCH 1.095 1.820 0.725
CH3CH2SH ethanethiol rCH 1.095 1.820 0.725
HSSSH trisulfane rHS 1.344 2.062 0.719
HSSSH trisulfane rHS 1.344 2.062 0.719
HSSSH trisulfane rHS 1.344 2.062 0.718
HSSSH trisulfane rHS 1.344 2.062 0.718
HSSSH trisulfane rHS 1.344 2.062 0.718
HSSSH trisulfane rHS 1.344 2.062 0.718
HSSSH trisulfane rHS 1.344 2.061 0.718
HSSSH trisulfane rHS 1.344 2.061 0.718
S4 Sulfur tetramer rSS 2.155 2.848 0.693
C4H6 1-Methylcyclopropene rCH 1.098 1.772 0.674
C4H6 1-Methylcyclopropene rCH 1.098 1.755 0.657
CH3SO2NH2 methanesulfonamide rCN 1.207 1.669 0.462
S4 Sulfur tetramer rSS 2.155 2.608 0.453
S4 Sulfur tetramer rSS 2.155 2.607 0.452
C4H10O Methyl propyl ether rCC 1.530 1.090 -0.440
Be2 Beryllium diatomic rBeBe 2.460 2.021 -0.439
Be2 Beryllium diatomic rBeBe 2.460 2.021 -0.439
C4H6 1-Methylcyclopropene rCH 1.070 1.508 0.438
CH3CH2SH ethanethiol rCH 1.089 1.521 0.432
CH3CH2SH ethanethiol rCH 1.089 1.521 0.432
CH3CH2SH ethanethiol rCH 1.089 1.520 0.431
CH3CH2SH ethanethiol rCH 1.089 1.519 0.430
CH3CH2SH ethanethiol rCH 1.089 1.518 0.429
CH3CH2SH ethanethiol rCH 1.089 1.518 0.429
CH3CH2SH ethanethiol rCH 1.092 1.521 0.429
CH3CH2SH ethanethiol rCH 1.092 1.521 0.429
C4H6 1-Methylcyclopropene rCC 1.515 1.086 -0.429
CH3CH2SH ethanethiol rCH 1.092 1.520 0.428
CH3CH2SH ethanethiol rCH 1.092 1.519 0.427
CH3CH2SH ethanethiol rCH 1.092 1.518 0.426
CH3CH2SH ethanethiol rCH 1.092 1.518 0.426
C2H4F2 1,2-difluoroethane rCH 1.093 1.511 0.418
C2H4F2 1,2-difluoroethane rCH 1.093 1.511 0.418
C2H4F2 1,2-difluoroethane rCH 1.093 1.499 0.406
C2H4F2 1,2-difluoroethane rCH 1.093 1.499 0.406
C2H4F2 1,2-difluoroethane rCH 1.093 1.499 0.406
GaP Gallium monophosphide rPGa 2.450 2.050 -0.400
GaP Gallium monophosphide rPGa 2.450 2.050 -0.400
GaP Gallium monophosphide rPGa 2.450 2.050 -0.400
GaP Gallium monophosphide rPGa 2.450 2.050 -0.400
CH2CHCH2F Allyl Fluoride rHC 1.130 1.491 0.361
CH2CHCH2F Allyl Fluoride rHC 1.130 1.489 0.359
AlP Aluminum monophosphide rAlP 2.400 2.059 -0.341
AlP Aluminum monophosphide rAlP 2.400 2.059 -0.341
AlP Aluminum monophosphide rAlP 2.400 2.059 -0.341
C3H3NO Isoxazole rCH 1.075 1.412 0.337
Be2 Beryllium diatomic rBeBe 2.460 2.789 0.329
CH3CF3 Ethane, 1,1,1-trifluoro- rCF 1.340 1.664 0.324
C4H10O Methyl propyl ether rCH 1.099 1.409 0.310
CH3CH2SH ethanethiol rCS 1.820 1.518 -0.302
CH3CH2SH ethanethiol rCS 1.820 1.518 -0.302
CH3CH2SH ethanethiol rCS 1.820 1.519 -0.301
CH3CH2SH ethanethiol rCS 1.820 1.520 -0.300
CH3CH2SH ethanethiol rCS 1.820 1.521 -0.299
CH3CH2SH ethanethiol rCS 1.820 1.521 -0.299
Al2 Aluminum diatomic rAlAl 2.701 2.997 0.296
CH3CH2SH ethanethiol rCC 1.528 1.823 0.295
CH3CH2SH ethanethiol rCC 1.528 1.822 0.294
CH3CH2SH ethanethiol rCC 1.528 1.822 0.294
CH3CH2SH ethanethiol rCC 1.528 1.822 0.294
CH3CH2SH ethanethiol rCC 1.528 1.820 0.292
CH3CH2SH ethanethiol rCC 1.528 1.820 0.292
FOO Dioxygen monofluoride radical rFO 1.649 1.379 -0.270
GaP Gallium monophosphide rPGa 2.450 2.202 -0.248
GaP Gallium monophosphide rPGa 2.450 2.202 -0.248
GaP Gallium monophosphide rPGa 2.450 2.202 -0.248
GaP Gallium monophosphide rPGa 2.450 2.202 -0.248
Mg2 Magnesium diatomic rMgMg 3.891 4.133 0.243
ONNO NO dimer rNN 2.236 2.000 -0.237
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.275 0.235
C2H2+ acetylene cation rCH 1.077 1.306 0.229
Al2 Aluminum diatomic rAlAl 2.701 2.474 -0.227
Al2 Aluminum diatomic rAlAl 2.701 2.474 -0.227
Si2H2 disilyne rSiSi 2.215 1.991 -0.224
Ar2 Argon diatomic rArAr 3.758 3.979 0.221
S4 Sulfur tetramer rSS 1.898 2.116 0.218
C4H6 1-Methylcyclopropene rCC 1.300 1.510 0.210
Si2H2 disilyne rSiH 1.668 1.458 -0.210
B2 Boron diatomic rBB 1.590 1.381 -0.209
CH2CCHCH3 1,2-Butadiene rCC 1.515 1.310 -0.205
AlP Aluminum monophosphide rAlP 2.260 2.059 -0.201
AlP Aluminum monophosphide rAlP 2.260 2.059 -0.201
AlP Aluminum monophosphide rAlP 2.260 2.059 -0.201
GaP Gallium monophosphide rPGa 2.250 2.050 -0.200
GaP Gallium monophosphide rPGa 2.250 2.050 -0.200
GaP Gallium monophosphide rPGa 2.250 2.050 -0.200
GaP Gallium monophosphide rPGa 2.250 2.050 -0.200
AlP Aluminum monophosphide rAlP 2.400 2.204 -0.196
AlP Aluminum monophosphide rAlP 2.400 2.204 -0.196
AlP Aluminum monophosphide rAlP 2.400 2.204 -0.196
AlP Aluminum monophosphide rAlP 2.400 2.204 -0.196
AlP Aluminum monophosphide rAlP 2.400 2.204 -0.196
AlP Aluminum monophosphide rAlP 2.400 2.204 -0.196
GaP Gallium monophosphide rPGa 2.240 2.050 -0.190
GaP Gallium monophosphide rPGa 2.240 2.050 -0.190
GaP Gallium monophosphide rPGa 2.240 2.050 -0.190
GaP Gallium monophosphide rPGa 2.240 2.050 -0.190
CH2CCHCH3 1,2-Butadiene rCC 1.314 1.503 0.189
Si2H2 disilyne rSiH 1.668 1.485 -0.183
Si2 Silicon diatomic rSiSi 2.246 2.076 -0.170
S3 Sulfur trimer rSS 1.917 2.087 0.170
AlP Aluminum monophosphide rAlP 2.220 2.059 -0.161
AlP Aluminum monophosphide rAlP 2.220 2.059 -0.161
AlP Aluminum monophosphide rAlP 2.220 2.059 -0.161
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.517 0.158
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.085 -0.155
ArH+ Argon hydride cation rArH 1.292 1.441 0.149
AlN Aluminum nitride rNAl 1.786 1.640 -0.147
FO Oxygen monofluoride rFO 1.354 1.499 0.145
ClF3 Chlorine trifluoride rFCl 1.597 1.740 0.143
ClF3 Chlorine trifluoride rFCl 1.597 1.740 0.143
N2 Nitrogen diatomic rNN 1.098 1.218 0.121
N2 Nitrogen diatomic rNN 1.098 1.218 0.121
Ne2 Neon diatomic rNeNe 3.100 2.982 -0.118
Si2H2 disilyne rSiSi 2.215 2.101 -0.114
PF3 Phosphorus trifluoride rFP 1.561 1.674 0.113
BC boron monocarbide rBC 1.491 1.385 -0.107
CaO Calcium monoxide rOCa 1.822 1.923 0.101
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
Na2 Sodium diatomic rNaNa 3.079 3.177 0.098
Na2 Sodium diatomic rNaNa 3.079 3.177 0.098
VO Vanadium monoxide rVO 1.589 1.496 -0.093
Ar2+ Argon diatomic cation rArAr 2.320 2.413 0.093
GaP Gallium monophosphide rPGa 2.110 2.202 0.092
GaP Gallium monophosphide rPGa 2.110 2.202 0.092
GaP Gallium monophosphide rPGa 2.110 2.202 0.092
GaP Gallium monophosphide rPGa 2.110 2.202 0.092
CF3CN Acetonitrile, trifluoro- rCF 1.328 1.419 0.091
SeO3 selenium trioxide rSeO 1.688 1.597 -0.090
Si2H2 disilyne rSiSi 2.215 2.128 -0.088
SiP Silicon monophosphide rSiP 2.078 1.993 -0.085
NaLi lithium sodium rLiNa 2.889 2.974 0.085
NaLi lithium sodium rLiNa 2.889 2.974 0.085
C3H4O Cyclopropanone rCO 1.191 1.274 0.083
SiP Silicon monophosphide rSiP 2.078 1.996 -0.082
Li2 Lithium diatomic rLiLi 2.673 2.750 0.077
CF3CN Acetonitrile, trifluoro- rCN 1.154 1.229 0.075
C2 Carbon diatomic rCC 1.243 1.317 0.074
C2 Carbon diatomic rCC 1.243 1.317 0.074
SO+ sulfur monoxide cation rOS 1.424 1.350 -0.074
SO+ sulfur monoxide cation rOS 1.424 1.350 -0.074
NS Mononitrogen monosulfide rNS 1.497 1.423 -0.074
NS Mononitrogen monosulfide rNS 1.497 1.423 -0.074
GaCl3 Gallium trichloride rClGa 2.180 2.107 -0.073
C3H4O Cyclopropanone rCH 1.086 1.013 -0.073
GaCl3 Gallium trichloride rClGa 2.180 2.107 -0.073
CF3CN Acetonitrile, trifluoro- rCC 1.492 1.419 -0.073
B4H10 Tetraborane(10) rHB 1.484 1.411 -0.073
FNO Nitrosyl fluoride rNF 1.512 1.440 -0.072
FNO Nitrosyl fluoride rNF 1.512 1.440 -0.072
CaBr Calcium monobromide rCaBr 2.594 2.665 0.071
PS phosphorus sulfide rPS 1.900 1.829 -0.071
PS phosphorus sulfide rPS 1.900 1.829 -0.071
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.510 -0.070
CN Cyano radical rCN 1.172 1.102 -0.069
PCl3 Phosphorus trichloride rPCl 2.043 1.974 -0.069
B2 Boron diatomic rBB 1.590 1.521 -0.069
B2 Boron diatomic rBB 1.590 1.521 -0.069
C2H2+ acetylene cation rCC 1.253 1.321 0.068
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.513 -0.067
ClFO3 Perchloryl fluoride rFCl 1.598 1.665 0.067
NaO sodium monoxide rONa 2.052 1.984 -0.067
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.513 -0.067
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.514 -0.066
CaS Calcium sulfide rSCa 2.318 2.383 0.065
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.336 -0.064
B4H10 Tetraborane(10) rHB 1.315 1.252 -0.063
CH3CHNOH Acetaldoxime rCC 1.550 1.488 -0.062
CH3CHNOH Acetaldoxime rCC 1.550 1.490 -0.060
ClNO2 Nitryl chloride rNCl 1.840 1.900 0.060
GaP Gallium monophosphide rPGa 2.110 2.050 -0.060
GaP Gallium monophosphide rPGa 2.110 2.050 -0.060
GaP Gallium monophosphide rPGa 2.110 2.050 -0.060
GaP Gallium monophosphide rPGa 2.110 2.050 -0.060
C4H8O2 Ethyl acetate rCO 1.448 1.508 0.060
CH3CHNOH Acetaldoxime rCC 1.550 1.491 -0.059
HCF Fluoromethylene rCH 1.138 1.082 -0.056
HCF Fluoromethylene rCH 1.138 1.082 -0.056
AlP Aluminum monophosphide rAlP 2.260 2.204 -0.056
AlP Aluminum monophosphide rAlP 2.260 2.204 -0.056
AlP Aluminum monophosphide rAlP 2.260 2.204 -0.056
AlP Aluminum monophosphide rAlP 2.260 2.204 -0.056
AlP Aluminum monophosphide rAlP 2.260 2.204 -0.056
AlP Aluminum monophosphide rAlP 2.260 2.204 -0.056
BrO+ Bromine monoxide cation rOBr 1.635 1.580 -0.055
C3H5 Allyl radical rCC 1.428 1.373 -0.055
C3H5 Allyl radical rCC 1.428 1.373 -0.055
NaF sodium fluoride rNaF 1.926 1.981 0.055
ScF Scandium monofluoride rFSc 1.788 1.843 0.055
BeCl2 Beryllium chloride rBeCl 1.750 1.804 0.054
C4H6 Methylenecyclopropane rCH 1.088 1.034 -0.054
ClNO2 Nitryl chloride rNCl 1.840 1.893 0.053
CH3CF3 Ethane, 1,1,1-trifluoro- rCH 1.081 1.028 -0.053
C4H10O Ethoxy ethane rCO 1.411 1.464 0.053
C4H6 Methylenecyclopropane rCH 1.090 1.039 -0.051
ClFO3 Perchloryl fluoride rFCl 1.598 1.649 0.051
C5H6 Bicyclo[2.1.0]pent-2-ene rCC 1.560 1.510 -0.050
CaCl calcium monochloride rClCa 2.437 2.487 0.050
BHCl2 Borane, dichloro- rBH 1.130 1.180 0.050
216 molecules.