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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 PBE1PBE/TZVP

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.201 3.116
C4H6 1-Methylcyclopropene rCH 1.087 3.403 2.316
C4H6 1-Methylcyclopropene rCC 1.476 2.252 0.776
C4H6 1-Methylcyclopropene rCH 1.087 1.826 0.739
CH3CH2SH ethanethiol rCH 1.095 1.833 0.738
CH3CH2SH ethanethiol rCH 1.095 1.829 0.734
HSSSH trisulfane rHS 1.344 2.077 0.733
HSSSH trisulfane rHS 1.344 2.077 0.733
S4 Sulfur tetramer rSS 2.155 2.874 0.719
C4H6 1-Methylcyclopropene rCH 1.098 1.777 0.679
C4H6 1-Methylcyclopropene rCH 1.098 1.757 0.659
CH3SO2NH2 methanesulfonamide rCN 1.207 1.685 0.478
Be2 Beryllium diatomic rBeBe 2.460 2.008 -0.452
ONNO NO dimer rNN 2.236 1.787 -0.449
C4H10O Methyl propyl ether rCC 1.530 1.094 -0.436
C4H6 1-Methylcyclopropene rCH 1.070 1.500 0.430
CH3CH2SH ethanethiol rCH 1.089 1.516 0.427
CH3CH2SH ethanethiol rCH 1.089 1.515 0.426
CH3CH2SH ethanethiol rCH 1.092 1.516 0.424
C4H6 1-Methylcyclopropene rCC 1.515 1.092 -0.423
CH3CH2SH ethanethiol rCH 1.092 1.515 0.423
C2H4F2 1,2-difluoroethane rCH 1.093 1.512 0.419
C2H4F2 1,2-difluoroethane rCH 1.093 1.499 0.406
S4 Sulfur tetramer rSS 2.155 2.537 0.382
GaP Gallium monophosphide rPGa 2.450 2.086 -0.364
GaP Gallium monophosphide rPGa 2.450 2.086 -0.364
GaP Gallium monophosphide rPGa 2.450 2.086 -0.364
GaP Gallium monophosphide rPGa 2.450 2.086 -0.364
CH2CHCH2F Allyl Fluoride rHC 1.130 1.488 0.358
CH2CHCH2F Allyl Fluoride rHC 1.130 1.487 0.357
C3H3NO Isoxazole rCH 1.075 1.417 0.342
AlP Aluminum monophosphide rAlP 2.400 2.081 -0.319
AlP Aluminum monophosphide rAlP 2.400 2.081 -0.319
AlP Aluminum monophosphide rAlP 2.400 2.081 -0.319
CH3CH2SH ethanethiol rCS 1.820 1.515 -0.305
CH3CH2SH ethanethiol rCC 1.528 1.833 0.305
CH3CH2SH ethanethiol rCS 1.820 1.516 -0.304
C4H10O Methyl propyl ether rCH 1.099 1.401 0.302
CH3CH2SH ethanethiol rCC 1.528 1.829 0.301
CaO Calcium monoxide rOCa 1.822 2.117 0.294
Si2H2 disilyne rSiSi 2.215 1.970 -0.246
Ar2 Argon diatomic rArAr 3.758 4.000 0.242
CaS Calcium sulfide rSCa 2.318 2.557 0.239
C2H2+ acetylene cation rCH 1.077 1.315 0.239
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.278 0.238
S4 Sulfur tetramer rSS 1.898 2.129 0.231
Ar2+ Argon diatomic cation rArAr 2.320 2.547 0.227
GaP Gallium monophosphide rPGa 2.450 2.240 -0.210
GaP Gallium monophosphide rPGa 2.450 2.240 -0.210
GaP Gallium monophosphide rPGa 2.450 2.240 -0.210
GaP Gallium monophosphide rPGa 2.450 2.240 -0.210
Si2H2 disilyne rSiH 1.668 1.466 -0.202
C4H6 1-Methylcyclopropene rCC 1.300 1.500 0.200
CaC Calcium monocarbide rCCa 2.302 2.491 0.190
CaBr Calcium monobromide rCaBr 2.594 2.780 0.187
AlP Aluminum monophosphide rAlP 2.400 2.218 -0.182
AlP Aluminum monophosphide rAlP 2.400 2.218 -0.182
AlP Aluminum monophosphide rAlP 2.400 2.218 -0.182
AlP Aluminum monophosphide rAlP 2.400 2.218 -0.182
AlP Aluminum monophosphide rAlP 2.400 2.218 -0.182
AlP Aluminum monophosphide rAlP 2.400 2.218 -0.182
AlP Aluminum monophosphide rAlP 2.260 2.081 -0.179
AlP Aluminum monophosphide rAlP 2.260 2.081 -0.179
AlP Aluminum monophosphide rAlP 2.260 2.081 -0.179
S3 Sulfur trimer rSS 1.917 2.092 0.175
Si2H2 disilyne rSiH 1.668 1.498 -0.170
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.525 0.166
CaH Calcium monohydride rCaH 2.003 2.167 0.164
GaP Gallium monophosphide rPGa 2.250 2.086 -0.164
GaP Gallium monophosphide rPGa 2.250 2.086 -0.164
GaP Gallium monophosphide rPGa 2.250 2.086 -0.164
GaP Gallium monophosphide rPGa 2.250 2.086 -0.164
ClF3 Chlorine trifluoride rFCl 1.597 1.755 0.158
ClF3 Chlorine trifluoride rFCl 1.597 1.755 0.158
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.086 -0.154
GaP Gallium monophosphide rPGa 2.240 2.086 -0.154
GaP Gallium monophosphide rPGa 2.240 2.086 -0.154
GaP Gallium monophosphide rPGa 2.240 2.086 -0.154
GaP Gallium monophosphide rPGa 2.240 2.086 -0.154
Mg2 Magnesium diatomic rMgMg 3.891 3.743 -0.147
AlP Aluminum monophosphide rAlP 2.220 2.081 -0.139
AlP Aluminum monophosphide rAlP 2.220 2.081 -0.139
AlP Aluminum monophosphide rAlP 2.220 2.081 -0.139
GaP Gallium monophosphide rPGa 2.110 2.240 0.130
GaP Gallium monophosphide rPGa 2.110 2.240 0.130
GaP Gallium monophosphide rPGa 2.110 2.240 0.130
GaP Gallium monophosphide rPGa 2.110 2.240 0.130
N2 Nitrogen diatomic rNN 1.213 1.091 -0.122
N2 Nitrogen diatomic rNN 1.213 1.091 -0.122
N2 Nitrogen diatomic rNN 1.213 1.091 -0.122
N2 Nitrogen diatomic rNN 1.213 1.091 -0.122
N2 Nitrogen diatomic rNN 1.213 1.091 -0.122
N2 Nitrogen diatomic rNN 1.213 1.091 -0.122
Si2H2 disilyne rSiSi 2.215 2.094 -0.122
CaBr2 Calcium dibromide rCaBr 2.616 2.732 0.116
K2 Potassium diatomic rKK 3.905 4.013 0.108
Si2H2 disilyne rSiSi 2.215 2.111 -0.104
N2 Nitrogen diatomic rNN 1.098 1.196 0.099
N2 Nitrogen diatomic rNN 1.098 1.196 0.099
ClOOCl Dichlorine dioxide rOO 1.426 1.328 -0.098
Be2 Beryllium diatomic rBeBe 2.460 2.363 -0.097
KH Potassium hydride rKH 2.243 2.337 0.095
SeO3 selenium trioxide rSeO 1.688 1.595 -0.093
KOH Potassium hydroxide rOK 2.212 2.295 0.083
Ne2+ Neon diatomic cation rNeNe 1.765 1.843 0.078
SiC silicon monocarbide rCSi 1.722 1.647 -0.075
B4H10 Tetraborane(10) rHB 1.484 1.409 -0.075
B2 Boron diatomic rBB 1.590 1.519 -0.071
Si2H2 disilyne rSiH 1.668 1.737 0.069
ClOOCl Dichlorine dioxide rOCl 1.704 1.768 0.064
CH3CHNOH Acetaldoxime rCC 1.550 1.488 -0.062
BN boron nitride rBN 1.325 1.263 -0.062
GaCl3 Gallium trichloride rClGa 2.180 2.119 -0.061
GaCl3 Gallium trichloride rClGa 2.180 2.119 -0.061
C2 Carbon diatomic rCC 1.243 1.301 0.058
ClOF3 Chlorine trifluoride oxide rFCl 1.603 1.661 0.058
ClF3 Chlorine trifluoride rFCl 1.697 1.755 0.058
ClF3 Chlorine trifluoride rFCl 1.697 1.755 0.058
C4H8O2 Ethyl acetate rCO 1.448 1.506 0.058
Li2 Lithium diatomic rLiLi 2.673 2.731 0.058
C3H3NO Isoxazole rCC 1.356 1.303 -0.053
B4H10 Tetraborane(10) rHB 1.315 1.262 -0.053
BeCl2 Beryllium chloride rBeCl 1.750 1.803 0.053
SF5Cl sulfur chloropentafluoride rSCl 2.030 2.083 0.053
FSN Thiazyl fluoride rFS 1.643 1.694 0.051
HClO4 perchloric acid rOCl 1.404 1.455 0.051
B2 Boron diatomic rBB 1.590 1.640 0.050
He2+ helium diatomic cation rHeHe 1.081 1.131 0.050
128 molecules.