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XVIII.A.4.

Molecules with the most calculations producing poor bond lengths

The following table lists molecules sorted by how many calculations produced bond lengths that differ from experiment by more than 0.050 Å.
Click on a name for a table of bond length comparisons.
molecule name poor calculations bond description
Be2 Beryllium diatomic 148 rBeBe
C3H8O2 1,3-Propanediol 134 rOH
BrF5 bromine pentafluoride 101 rFBr
ClFO3 Perchloryl fluoride 101 rFCl
KCl Potassium Chloride 94 rKCl
PCl5 Phosphorus pentachloride 91 rPCl
CuF Copper monofluoride 88 rCuF
SF4 Sulfur tetrafluoride 87 rSF
NO3 Nitrogen trioxide 85 rNO
LiO lithium oxide 80 rLiO
ClF3 Chlorine trifluoride 77 rFCl
BrF3 Bromine trifluoride 77 rFBr
CuCl Copper monochloride 76 rCuCl
CuO Copper Monoxide 74 rCuO
CH3CH2O Ethoxy radical 72 rCH
CH3CH2O Ethoxy radical 72 rCH
CHF2Cl difluorochloromethane 72 rCCl
SF4 Sulfur tetrafluoride 69 rSF
CCl2 dichloromethylene 68 rCCl
BrCl Bromine monochloride 65 rClBr
CH3ONO Methyl nitrite 65 rNO
ClFO3 Perchloryl fluoride 64 rClO
SSO Disulfur monoxide 62 rSS
PCl5 Phosphorus pentachloride 61 rPCl
SCl sulfur monochloride 61 rSCl
ClF3 Chlorine trifluoride 61 rFCl
CH3NO3 Methyl nitrate 61 rNO
AlN Aluminum nitride 61 rNAl
CH2FCl fluorochloromethane 61 rCCl
CH2O2 Dioxirane 59 rOO
Br2 Bromine diatomic 57 rBrBr
SeO Selenium monoxide 57 rSeO
HOBr Hypobromous acid 55 rBrO
BrF Bromine monofluoride 55 rFBr
C2H6O2S Dimethyl sulfone 54 rSO
CH2O2 Dioxirane 54 rCO
SSO Disulfur monoxide 54 rSO
PF5 Phosphorus pentafluoride 53 rPF
BrF3 Bromine trifluoride 53 rFBr
HNO3 Nitric acid 52 rNO
HOCl hypochlorous acid 51 rClO
SeO2 Selenium dioxide 51 rSeO
C6H6 Fulvene 51 rCH
SiH2Cl2 dichlorosilane 50 rSiCl
SOCl2 thionyl chloride 50 rSO
PCl phosphorus chloride 50 rPCl
HO2 Hydroperoxy radical 50 rOO
SiH3F monofluorosilane 49 rSiF
PO2 Phosphorus dioxide 49 rPO
CH3Br methyl bromide 49 rCBr
Se2 Selenium diatomic 48 rSeSe
CH3COCl Acetyl Chloride 47 rCCl
BrF5 bromine pentafluoride 47 rFBr
C2Cl2 dichloroacetylene 47 rCCl
CH3OC2H5 Ethane, methoxy- 46 rCO
SiHCl3 Trichlorosilane 46 rSiCl
C2H6O2S Dimethyl sulfone 44 rCS
CH3OC2H5 Ethane, methoxy- 43 rCO
N2O3 Dinitrogen trioxide 43 rNO
CCl2O Phosgene 42 rCCl
C5H10 2-Pentene, (E)- 41 rCC
CH2ClCH2Cl Ethane, 1,2-dichloro- 40 rCCl
FO Oxygen monofluoride 40 rFO
SiH3Cl chlorosilane 39 rSiCl
SiF4 Silicon tetrafluoride 38 rSiF
N2O3 Dinitrogen trioxide 38 rNO
CH3SCH2CH3 Ethane, (methylthio)- 36 rCS
CH2Br2 dibromomethane 36 rCBr
C6H6 Fulvene 35 rCC
PF5 Phosphorus pentafluoride 35 rPF
C6H6 Fulvene 34 rCC
CFCl3 Trichloromonofluoromethane 34 rCCl
C6H6 Fulvene 33 rCC
C6H6 Fulvene 33 rCC
C6H6 Fulvene 33 rCH
CHBr3 bromoform 33 rCBr
CHClCCl2 Trichloroethylene 33 rCCl
CHClCCl2 Trichloroethylene 33 rCCl
ClCN chlorocyanogen 33 rCCl
CH3OC2H5 Ethane, methoxy- 29 rCH
CH3SCH2CH3 Ethane, (methylthio)- 28 rCS
CH3ONO Methyl nitrite 28 rNO
C5H8 Bicyclo[2.1.0]pentane 28 rCC
CBr4 Carbon tetrabromide 28 rCBr
N2O3 Dinitrogen trioxide 27 rNO
MgOH magnesium hydroxide 24 rMgO
CH2C(CH3)OCH3 1-Propene, 2-methoxy- 24 rCO
C2Cl2 dichloroacetylene 24 rCC
C2HF3 Trifluoroethylene 23 rCF
CH3ONO Methyl nitrite 23 rCO
C3H8O2 Methane, dimethoxy- 21 rCO
C4H10O Methyl propyl ether 21 rCO
C5H6 Bicyclo[2.1.0]pent-2-ene 21 rCC
C4H10O Propane, 2-methoxy- 19 rCO
C4H8O2 1,3-Dioxane 19 rCO
C4H8O2 1,3-Dioxolane, 2-methyl- 18 rCO
C3O2 Carbon suboxide 18 rCO
Si(CH3)4 tetramethylsilane 18 rSiC
CH3OCHO methyl formate 17 rCO
H2CS Thioformaldehyde 17 rCS
C4H10O Ethoxy ethane 17 rCO
C2H3N3 1H-1,2,4-Triazole 17 rCN
C4H8O2 Ethyl acetate 16 rCO
C6H10 Bicyclo[3.1.0]hexane 16 rCC
CH2C(CH3)OCH3 1-Propene, 2-methoxy- 16 rCO
C2H5F fluoroethane 15 rCF
C3H3NO Oxazole 15 rCO
C2H3N3 1H-1,2,4-Triazole 14 rCN
HOBr Hypobromous acid 14 rOH
CH3OCHO methyl formate 14 rCO
CH3OCH3 Dimethyl ether 14 rCO
HNCO Isocyanic acid 13 rCO
LiOH lithium hydroxide 13 rLiO
C4H10O Methyl propyl ether 13 rCO
C3H3NO Oxazole 12 rCO
C6H10 Bicyclo[3.1.0]hexane 12 rCC
C6H10 Bicyclo[3.1.0]hexane 12 rCC
OCSe Carbonyl selenide 12 rCO
C6H10 Bicyclo[3.1.0]hexane 11 rCH
C6H10 Bicyclo[3.1.0]hexane 11 rCH
C3H4 cyclopropene 11 rCH
C3H4 cyclopropene 11 rCH
C2H5F fluoroethane 11 rCC
C5H8 1,3-Butadiene, 2-methyl- 10 rCC
C5H8 1,3-Butadiene, 2-methyl- 10 rCH
C5H12O Butane, 1-methoxy- 10 rCO
CFCl3 Trichloromonofluoromethane 10 rCF
CH2FCl fluorochloromethane 9 rCF
C5H8O Cyclopentanone 9 rCC
C5H8 1,3-Butadiene, 2-methyl- 8 rCC
CH2CHCHO Acrolein 8 rCC
CH2CHCHO Acrolein 8 rCO
OCSe Carbonyl selenide 8 rCSe
MgOH magnesium hydroxide 8 rOH
HO2 Hydroperoxy radical 8 rOH
CHF2Cl difluorochloromethane 8 rCF
H2O Water 7 rOH
CH2CO Ketene 7 rCO
C6H5OCH3 Anisole 7 rCO
C4H4N2 1,3-Diazine 7 rCN
C3O2 Carbon suboxide 6 rCC
C4H8O2 Ethyl acetate 6 rCO
C5H10 2-Pentene, (E)- 6 rCC
C3H2N2 Malononitrile 6 rCC
BF3 Borane, trifluoro- 6 rBF
C6H5OH phenol 6 rCO
C5H8 Cyclopentene 6 rCC
CH3CH2CHO Propanal 6 rCC
HOCl hypochlorous acid 6 rOH
CH3NC methyl isocyanide 6 rCN
CH3NC methyl isocyanide 5 rCN
CH3NHCH3 Dimethylamine 5 rCH
ClCN chlorocyanogen 5 rCN
CH3CH(NH2)COOH Alanine 5 rCC
C4H6 Methylenecyclopropane 5 rCC
C4H6O Cyclobutanone 5 rCC
C3H8O2 Methane, dimethoxy- 5 rCO
C3H4O Cyclopropanone 4 rCC
C3H6 Cyclopropane 4 rCC
C4H6 Bicyclo[1.1.0]butane 4 rCC
CH3CH2CHO Propanal 4 rCH
CH3CH2CHO Propanal 4 rCH
CH3CH2CHO Propanal 4 rCH
CH3CH2CHO Propanal 4 rCH
CH3CH2CHO Propanal 4 rCC
C6H8 1,3-Cyclohexadiene 4 rCC
C6H8 1,3-Cyclohexadiene 4 rCH
C6H8 1,3-Cyclohexadiene 4 rCH
C5H10S 2H-Thiopyran, tetrahydro- 4 rCC
C5H6 Bicyclo[2.1.0]pent-2-ene 4 rCC
C5H7N Cyclobutanecarbonitrile 4 rCC
NH2CONH2 Urea 4 rNH
HBr hydrogen bromide 4 rHBr
LiOH lithium hydroxide 3 rOH
CH3ONO Methyl nitrite 3 rCH
CH3ONO Methyl nitrite 3 rCH
CH3COCl Acetyl Chloride 3 rCO
C5H8 Spiropentane 3 rCC
CCl2O Phosgene 3 rCO
CH3CH2NH2 Ethylamine 3 rCH
CH3CH2O Ethoxy radical 3 rCH
C4H6S Thiophene, 2,5-dihydro- 3 rCH
C4H8O2 Ethyl acetate 3 rCO
C5H10 2-Pentene, (Z)- 3 rCC
C3H8O2 1,3-Propanediol 3 rOH
C2H Ethynyl radical 3 rCC
C2H2O2 Ethanedial 3 rCH
C2H3N3 1H-1,2,4-Triazole 3 rCN
C3H4N2 1H-Imidazole 2 rCN
C2H2 Acetylene 2 rCC
BN boron nitride 2 rBN
C4H8O2 Ethyl acetate 2 rCC
CH2CCHCH3 1,2-Butadiene 2 rCC
CH2CHCH2CH3 1-Butene 2 rCC
C5H8O Methyl cyclopropyl ketone 2 rCC
C6H5OCH3 Anisole 2 rCO
C5H8 Cyclobutane, methylene- 2 rCC
C5H8 Cyclobutane, methylene- 2 rCH
C5H10 2-Pentene, (Z)- 2 rCH
C5H10O 2-Butanone, 3-methyl- 2 rCC
CH3NH2 methyl amine 2 rCN
CH3NH2 methyl amine 2 rNH
P2H4 H2PPH2 2 rPH
P2H4 H2PPH2 2 rPH
H2Se Hydrogen selenide 1 rHSe
CH3CH2SH ethanethiol 1 rCH
CH3CH2SH ethanethiol 1 rCH
CH3COCl Acetyl Chloride 1 rCC
CH3OCHO methyl formate 1 rCH
CH3OCHO methyl formate 1 rCH
CHF2Cl difluorochloromethane 1 rCH
CHONH2 formamide 1 rNH
CHONH2 formamide 1 rNH
SiH3Cl chlorosilane 1 rSiH
SiH2Cl2 dichlorosilane 1 rSiH
SiH4 Silane 1 rSiH
C5H10O 2-Butanone, 3-methyl- 1 rCC
C5H10O 2-Butanone, 3-methyl- 1 rCH
C5H5N Pyridine 1 rCC
C5H6 1-Buten-3-yne, 2-methyl- 1 rCC
C5H8 Bicyclo[2.1.0]pentane 1 rCC
C5H8 Bicyclo[2.1.0]pentane 1 rCC
C6H8 1,3,5-Hexatriene, (Z)- 1 rCC
C5H8O 2H-Pyran, 3,4-dihydro- 1 rCC
C6H12 Cyclohexane 1 rCH
C6H5NH2 aniline 1 rCC
CH2CHCH2CH3 1-Butene 1 rCC
C8H8 cyclooctatetraene 1 rCC
CH3CH(NH2)COOH Alanine 1 rCC
CH2CHOCHCH2 Vinyl ether 1 rCO
C4H8O2 Ethyl acetate 1 rCC
C4H6 Bicyclo[1.1.0]butane 1 rCH
C4H6 Cyclobutene 1 rCC
C4H6O2 2,3-Butanedione 1 rCC
C5H10 2-Pentene, (Z)- 1 rCH
C5H10 2-Pentene, (Z)- 1 rCC
C3H5ClO Oxirane, (chloromethyl)- 1 rCC
C4H10O Ethoxy ethane 1 rCC
C4H10O Methyl propyl ether 1 rCC
C4H4N2 1,3-Diazine 1 rCN
C4H10O Propane, 2-methoxy- 1 rCH
C2H2O2 Ethanedial 1 rCC
C(CH3)3NH2 2-Propanamine, 2-methyl- 1 rCC
C10H8 naphthalene 1 rCC
C3H4N2 1H-Imidazole 1 rCN
C2H5N Aziridine 1 rCH
C2H5N Aziridine 1 rCH
C2H3N3 1H-1,2,4-Triazole 1 rCN