National Institute of Standards and Technology

Computational Chemistry Comparison and Benchmark DataBase
Release 22	May 2022
NIST Standard Reference Database 101

I	Introduction
II	Experimental data
III	Calculated data
IV	Data comparisons
V	Cost comparisons
VI	Input and output files
VII	Tutorials and Units
VIII	Links to other sites
IX	Feedback
X	Older CCCBDB versions
XII	Geometries
XIII	Vibrations
XIV	Reaction data
XV	Entropy data
XVI	Bibliographic data
XVII	Ion data
XVIII	Bad calculations
XIX	Index of properties
XX	H-bond dimers
XXI	Oddities

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IV.D.8.

Average Bond Length Differences by Model Chemistry

Calculated at MP4/6-31G*

Species	Name	Bond type	Bond Length (Å)
			Experimental	unc.	Calculated	Difference	atom1	atom2
C4H10O	Methyl propyl ether	rCC	1.530		1.099	-0.431	5	13
Cu2	Copper diatomic	rCuCu	2.220		2.008	-0.212	1	2
CuF	Copper monofluoride	rCuF	1.745	±0.000	1.647	-0.098	1	2
CuCl	Copper monochloride	rCuCl	2.051	±0.000	1.981	-0.070	1	2
LiO	lithium oxide	rLiO	1.688		1.621	-0.067	1	2
CuH	Copper monohydride	rCuH	1.463		1.399	-0.064	1	2
PS	phosphorus sulfide	rP=S	1.900		1.837	-0.063	1	2
CuO	Copper Monoxide	rCuO	1.724	±0.000	1.670	-0.054	1	2
MgO	magnesium oxide	rMgO	1.749		1.703	-0.046	1	2
C6H6	Fulvene	rCH	1.130	±0.030	1.090	-0.040	2	7
NS	Mononitrogen monosulfide	rNS	1.497	±0.000	1.462	-0.035	1	2
C5H8O	Methyl cyclopropyl ketone	rCH	1.126		1.094	-0.032	3	7
C2Cl2	dichloroacetylene	rC#C	1.246	±0.030	1.219	-0.027	1	2
C2H	Ethynyl radical	rC#C	1.217		1.189	-0.027	1	2
CP	Carbon monophosphide	rC#P	1.562		1.536	-0.026	1	2
C2H2O2	Ethanedial	rCH	1.132		1.110	-0.022	1	3
HeH+	Helium hydride cation	rHHe	0.790		0.769	-0.021	1	2
CH2ClCH2Cl	Ethane, 1,2-dichloro-	rCH	1.112		1.094	-0.018	1	5
C7H16	heptane	rCH	1.121	±0.007	1.103	-0.018	1	8
Si(CH3)4	tetramethylsilane	rCH	1.115	±7.000	1.099	-0.016	2	6
CH3OCl	methyl hypochlorite	rCH	1.111	±0.018	1.095	-0.016	3	4
CH3CH2CH2CH3	Butane	rCH	1.117		1.102	-0.015	1	5
H2Cl+	dihydrogen monochloride cation	rHCl	1.321	±0.000	1.306	-0.015	1	2
SiC	silicon monocarbide	rCSi	1.722		1.709	-0.013	1	2
CH2ClCH2Cl	Ethane, 1,2-dichloro-	rCC	1.531		1.519	-0.012	1	2
C4H8O2	Ethyl acetate	rCH	1.105		1.093	-0.012	1	7
CH3COCl	Acetyl Chloride	rCH	1.105		1.094	-0.011	2	5
ArH+	Argon hydride cation	rArH	1.292	±0.000	1.281	-0.011	1	2
CF3COOH	trifluoroacetic acid	rCC	1.546	±0.005	1.537	-0.009	1	2
HS+	sulfur monohydride cation	rSH	1.374		1.365	-0.009	1	2
C5H8	Ethenylcyclopropane	rCH	1.099		1.092	-0.007	1	6
CH3CH2CHO	Propanal	rCH	1.103		1.096	-0.007	1	6
NO	Nitric oxide	rN=O	1.154	±0.000	1.148	-0.006	1	2
CH3ONO	Methyl nitrite	rCH	1.102		1.096	-0.006	1	4
B2H6	Diborane	rBH	1.200		1.194	-0.006	1	5
B2H6	Diborane	rBH	1.320		1.315	-0.005	1	3
CO+	carbon monoxide cation	rC=O	1.115	±0.000	1.110	-0.005	1	2
C10H8	Azulene	rC:C	1.414		1.410	-0.004	7	9
CH2NH	Methanimine	rCH	1.103		1.099	-0.004	1	3
CH2	Methylene	rCH	1.085		1.082	-0.003	1	2
C5H6	Propellane	rCC	1.525	±0.002	1.522	-0.003	1	2
PO	Phosphorus monoxide	rP=O	1.476		1.473	-0.003	1	2
C2H3Cl	Ethene, chloro-	rCH	1.090		1.087	-0.003	1	4
C2H2O2	Ethanedial	rCC	1.526		1.523	-0.003	1	2
C3F6	hexafluoropropene	rCF	1.329	±0.003	1.326	-0.003	1	4
C7H16	heptane	rCC	1.534		1.532	-0.002	1	2
CH3CH2CHO	Propanal	rCH	1.105		1.103	-0.002	2	8
NaF	sodium fluoride	rNaF	1.926	±0.000	1.924	-0.002	1	2
CH3CH2OH	Ethanol	rCH	1.098		1.096	-0.002	1	6
CH3NHCH3	Dimethylamine	rCH	1.098		1.097	-0.001	3	7
CH2CHCH2CH3	1-Butene	rCC	1.536		1.535	-0.001	1	2
C3H6O	2-Propen-1-ol	rCH	1.091	±0.010	1.091	-0.000	3	9
CH2PH	Phosphaethene	rCH	1.090	±0.015	1.090	0.000	1	3
BN	boron nitride	rB=N	1.325		1.325	0.000	1	2
HCCl	Chloromethylene	rCH	1.119	±0.036	1.118	0.000	1	3
CH3CHO	Acetaldehyde	rCH	1.114		1.114	0.000	1	4
HCl+	hydrogen chloride cation	rHCl	1.315		1.315	0.000	1	2
C3H6O	2-Propen-1-ol	rCH	1.092	±0.010	1.092	0.000	2	7
CH3NH2	methyl amine	rCN	1.471	±0.003	1.471	0.000	1	2
CH3COCl	Acetyl Chloride	rCC	1.506		1.506	0.000	1	2
CH2PH	Phosphaethene	rCH	1.090	±0.015	1.090	0.000	1	4
CH3CH2CHO	Propanal	rCH	1.115		1.115	0.000	3	10
CH3CH2CH2CH3	Butane	rCC	1.531		1.531	0.000	1	2
SiH2Cl2	dichlorosilane	rSiH	1.480	±0.015	1.480	0.000	1	2
CH3CH2CHO	Propanal	rCH	1.096		1.097	0.001	1	5
CH3NC	methyl isocyanide	rCH	1.094		1.095	0.001	1	4
CH3CCH	propyne	rCH	1.096		1.097	0.001	1	5
C4H8O2	Ethyl acetate	rCC	1.515		1.516	0.001	5	6
C3H4O	Cyclopropanone	rCC	1.575		1.576	0.001	3	4
NH4+	ammonium cation	rHN	1.029	±0.000	1.030	0.001	1	2
CH3ONO	Methyl nitrite	rCH	1.090		1.091	0.001	1	3
CH3OCHO	methyl formate	rCH	1.101		1.102	0.001	3	8
CH2CO	Ketene	rCH	1.083		1.084	0.002	1	4
CH3NO	nitrosomethane	rCH	1.094		1.096	0.002	1	4
CHF3	Methane, trifluoro-	rCH	1.091	±0.014	1.093	0.002	1	2
C4H8O2	Ethyl acetate	rCC	1.508		1.511	0.003	1	2
D2	Deuterium diatomic	rDD	0.742		0.744	0.003	1	2
BeCl	beryllium monochloride	rBeCl	1.797		1.800	0.003	1	2
H2	Hydrogen diatomic	rHH	0.741		0.744	0.003	1	2
HD	Deuterium hydride	rDH	0.741		0.744	0.003	1	2
CH2FCl	fluorochloromethane	rCH	1.090	±0.010	1.093	0.003	1	4
CH3CH2CHO	Propanal	rCC	1.523		1.526	0.003	1	2
CH3CHFCH3	2-Fluoropropane	rCH	1.093	±0.006	1.096	0.003	4	8
CH3CHFCH3	2-Fluoropropane	rCH	1.094	±0.005	1.097	0.003	4	10
C3H6O	2-Propen-1-ol	rCH	1.102	±0.020	1.105	0.003	1	6
CH3NH2	methyl amine	rNH	1.018	±0.001	1.022	0.003	2	6
C2H5F	fluoroethane	rCH	1.095	±0.007	1.098	0.003	1	4
NH2SH	Thiohydroxylamine	rSH	1.344	±0.029	1.348	0.004	2	3
C2H2ClF	1-chloro-1-fluoroethylene	rCH	1.082	±0.001	1.086	0.004	2	5
C6H6	Fulvene	rCC	1.476	±0.008	1.480	0.004	5	6
CHF2Cl	difluorochloromethane	rCF	1.350	±0.010	1.354	0.004	1	4
CH3OC2H5	Ethane, methoxy-	rCH	1.092	±0.007	1.096	0.004	4	11
CH3NC	methyl isocyanide	rCN	1.426	±0.003	1.430	0.004	1	2
C4H6	Cyclobutene	rCC	1.517		1.521	0.004	1	3
C3H8	Propane	rCH	1.096		1.100	0.004	1	4
CH3CH2CHO	Propanal	rCC	1.509		1.513	0.004	2	3
CH2O2	Dioxirane	rCH	1.090	±0.002	1.095	0.005	1	2
CH3OC2H5	Ethane, methoxy-	rCO	1.415	±0.005	1.420	0.005	1	2
CH3OC2H5	Ethane, methoxy-	rCH	1.099	±0.007	1.104	0.005	1	6
CH3OCH3	Dimethyl ether	rCH	1.099	±0.001	1.104	0.005	2	6
C6H6	Fulvene	rC=C	1.349	±0.002	1.353	0.005	1	2
AsF5	Arsenic pentafluoride	rAsF	1.711	±0.005	1.716	0.005	1	5
CH2ClCH2Cl	Ethane, 1,2-dichloro-	rCCl	1.790		1.795	0.005	1	3
C4H6	Cyclobutene	rCH	1.094		1.099	0.005	3	7
C4H8	cyclobutane	rCH	1.093		1.099	0.005	1	5
CH2FCl	fluorochloromethane	rCF	1.370	±0.001	1.375	0.005	1	2
C10H8	Azulene	rC:C	1.405	±0.001	1.410	0.005	2	9
CH3NO	nitrosomethane	rCH	1.092		1.097	0.005	1	5
C3H6	Cyclopropane	rCH	1.083		1.089	0.006	1	4
CH2Cl2	Methylene chloride	rCH	1.085	±0.002	1.091	0.006	1	2
CH3CHClCH3	Propane, 2-chloro-	rCH	1.091		1.097	0.006	2	5
CH3OCHO	methyl formate	rCH	1.086		1.092	0.006	1	5
BH3	boron trihydride	rBH	1.190		1.196	0.006	1	2
C2H5N	Aziridine	rCH	1.083		1.089	0.006	3	5
HOCl	hypochlorous acid	rOH	0.973	±0.002	0.979	0.006	1	2
CH2CHF	Ethene, fluoro-	rCH	1.082		1.088	0.006	1	4
C2H5F	fluoroethane	rCH	1.090	±0.007	1.096	0.006	2	7
C10H8	Azulene	rC:C	1.398		1.404	0.006	1	3
CH3OC2H5	Ethane, methoxy-	rCH	1.100	±0.003	1.106	0.006	3	8
C2H2	Acetylene	rCH	1.063		1.069	0.006	1	3
C5H8	Ethenylcyclopropane	rCC	1.475		1.481	0.006	1	2
C2H5F	fluoroethane	rCF	1.398	±0.007	1.404	0.006	1	3
P2H4	Diphosphine	rPH	1.417		1.423	0.006	1	3
C5H8O	Methyl cyclopropyl ketone	rCC	1.510		1.517	0.007	2	3
C4H8	cyclobutane	rCH	1.091		1.098	0.007	1	6
C2H5N	Aziridine	rCH	1.084		1.091	0.007	3	6
C6H6	Fulvene	rCC	1.470	±0.004	1.477	0.007	1	3
NH3BF3	Amminetrifluoroboron	rBN	1.673		1.680	0.007	1	2
CH3CHClCH3	Propane, 2-chloro-	rCH	1.092		1.099	0.007	3	6
C4H6	Cyclobutene	rCH	1.083		1.090	0.007	1	5
CH2NN	diazomethane	rCH	1.075		1.082	0.007	1	4
C2H5F	fluoroethane	rCH	1.091	±0.007	1.098	0.007	2	6
C6H6	Fulvene	rC=C	1.355	±0.004	1.362	0.007	3	5
HClO4	perchloric acid	rOH	0.980		0.987	0.007	3	6
C3H4	cyclopropene	rCH	1.088		1.095	0.007	1	6
CH4	Methane	rCH	1.087	±0.001	1.094	0.007	1	2
C2H2+	acetylene cation	rCH	1.077	±0.005	1.084	0.008	1	3
BCl	boron monochloride	rBCl	1.719	±0.000	1.727	0.008	1	2
C5H6	Propellane	rCC	1.596	±0.005	1.604	0.008	2	5
P2H4	Diphosphine	rPH	1.414		1.422	0.008	1	4
CH3OCH3	Dimethyl ether	rCO	1.411	±0.001	1.419	0.008	1	2
C4H6	Bicyclo[1.1.0]butane	rCC	1.497		1.505	0.008	1	2
CH3CH2Cl	Ethyl chloride	rCH	1.090		1.098	0.008	1	3
C3H6O	2-Propen-1-ol	rCH	1.096	±0.030	1.104	0.008	1	5
OCSe	Carbonyl selenide	rC=Se	1.709		1.717	0.008	1	3
C3H3NO	Oxazole	rCH	1.073	±0.001	1.081	0.008	5	8
CH3Br	methyl bromide	rCH	1.082	±0.001	1.091	0.008	1	3
KF	Potassium Fluoride	rKF	2.171	±0.000	2.180	0.008	1	2
CH3CH2Cl	Ethyl chloride	rCH	1.086		1.095	0.008	2	7
C6H6	Fulvene	rCH	1.080	±0.005	1.088	0.008	5	11
C3H3NO	Oxazole	rCH	1.075	±0.001	1.084	0.008	4	7
C2H3Cl	Ethene, chloro-	rCH	1.079		1.087	0.008	2	5
LiF	lithium fluoride	rLiF	1.564	±0.000	1.572	0.009	1	2
CH3CHO	Acetaldehyde	rCH	1.086		1.095	0.009	2	5
CH3CHFCH3	2-Fluoropropane	rCH	1.092		1.101	0.009	1	3
C3H3NO	Oxazole	rCH	1.075	±0.001	1.084	0.009	2	6
C3H6	Cyclopropane	rCC	1.501		1.510	0.009	1	2
C10H8	Azulene	rCH	1.084		1.093	0.009	4	14
CH3OC2H5	Ethane, methoxy-	rCH	1.086	±0.010	1.095	0.009	1	5
CH3OC2H5	Ethane, methoxy-	rCH	1.089	±0.008	1.098	0.009	4	10
C2H2+	acetylene cation	rC=C	1.253	±0.001	1.262	0.009	1	2
C10H8	Azulene	rCH	1.080		1.089	0.009	9	17
CH3ONO	Methyl nitrite	rCO	1.437		1.446	0.009	1	2
CH2NN	diazomethane	rC=N	1.300		1.309	0.009	1	2
CH3CCH	propyne	rCH	1.060		1.069	0.009	3	4
CH2CHF	Ethene, fluoro-	rCH	1.077		1.087	0.010	2	5
CH3OCH3	Dimethyl ether	rCH	1.085	±0.001	1.095	0.010	2	4
CH3NHCH3	Dimethylamine	rCH	1.098		1.108	0.010	3	5
C6H6	Fulvene	rCH	1.078	±0.005	1.088	0.010	3	9
SiH4	Silane	rSiH	1.480	±0.000	1.490	0.010	1	2
HO2	Hydroperoxy radical	rOO	1.331		1.340	0.010	1	2
CH3CH2OH	Ethanol	rCH	1.088		1.098	0.010	1	5
CH3CHFCH3	2-Fluoropropane	rCH	1.088	±0.006	1.098	0.010	4	6
C3F6	hexafluoropropene	rC=C	1.329	±0.003	1.339	0.010	1	2
C2H5F	fluoroethane	rCC	1.505	±0.007	1.515	0.010	1	2
C3H4	cyclopropene	rCH	1.072		1.082	0.010	2	4
ScH	Scandium monohydride	rScH	1.775	±0.000	1.785	0.010	1	2
B2	Boron diatomic	rBB	1.590		1.600	0.010	1	2
AlCl	Aluminum monochloride	rAlCl	2.130	±0.000	2.140	0.010	1	2
BeH2	beryllium dihydride	rBeH	1.326	±0.000	1.337	0.010	1	2
SiH3Cl	chlorosilane	rSiH	1.475		1.485	0.010	1	3
C2H3	vinyl	rCH	1.085		1.095	0.010	2	4
C3H6O	2-Propen-1-ol	rCH	1.078	±0.010	1.089	0.011	3	8
MgF	Magnesium monofluoride	rMgF	1.750		1.761	0.011	1	2
SiH3F	monofluorosilane	rSiH	1.476		1.487	0.011	1	3
BeH	beryllium monohydride	rBeH	1.343		1.353	0.011	1	2
DCl	Hydrochloric acid-d	rDCl	1.275	±0.000	1.285	0.011	1	2
HCl	Hydrogen chloride	rHCl	1.275	±0.000	1.285	0.011	1	2
CH3OCHO	methyl formate	rCO	1.437		1.448	0.011	1	2
CH	Methylidyne	rCH	1.120		1.131	0.011	1	2
SiH+	silicon monohydride cation	rSiH	1.504		1.515	0.011	1	2
SiHCl3	Trichlorosilane	rSiH	1.464		1.475	0.011	1	2
NH	Imidogen	rNH	1.036		1.047	0.011	1	2
C3H3NO	Oxazole	rCO	1.357	±0.003	1.368	0.011	1	2
C3H3NO	Oxazole	rCO	1.370	±0.002	1.381	0.011	1	5
BH	Boron monohydride	rBH	1.232		1.244	0.011	1	2
CH2F2	Methane, difluoro-	rCH	1.084	±0.003	1.095	0.011	1	2
CH2Cl2	Methylene chloride	rCCl	1.767	±0.002	1.778	0.011	1	4
CH3CH2O	Ethoxy radical	rCH	1.085		1.096	0.011	1	5
CH3NH2	methyl amine	rCH	1.093	±0.000	1.104	0.012	1	3
CH3CSNH2	Ethanethioamide	rC=S	1.647	±0.002	1.659	0.012	1	2
CH3OCl	methyl hypochlorite	rCH	1.086	±0.018	1.098	0.012	3	5
C10H8	naphthalene	rC:C	1.410		1.422	0.012	2	3
HS	Mercapto radical	rSH	1.341		1.353	0.012	1	2
H2O	Water	rOH	0.958	±0.000	0.970	0.012	1	2
C10H8	Azulene	rCH	1.081		1.094	0.013	1	11
CH3CH2O	Ethoxy radical	rCH	1.086		1.099	0.013	1	4
DS	Mercapto-d	rSD	1.341		1.353	0.013	1	2
N3	azide radical	rNN	1.181		1.194	0.013	1	2
CH2CHCH2CH3	1-Butene	rCC	1.493		1.506	0.013	2	3
SiH3+	Silyl cation	rSiH	1.460	±0.010	1.473	0.013	1	2
C10H8	Azulene	rCH	1.083		1.096	0.013	5	15
DO	Hydroxyl-d	rDO	0.970		0.983	0.014	1	2
CH2O2	Dioxirane	rCO	1.388	±0.004	1.401	0.014	1	4
NH2F	monofluoroamine	rNF	1.433		1.447	0.014	1	2
OH	Hydroxyl radical	rOH	0.970		0.983	0.014	1	2
N2O3	Dinitrogen trioxide	rN=O	1.217		1.231	0.014	2	5
C2HF3	Trifluoroethylene	rCF	1.316	±0.011	1.330	0.014	1	3
HO2	Hydroperoxy radical	rOH	0.971		0.985	0.014	1	3
PH	phosphorus monohydride	rPH	1.422		1.437	0.014	1	2
BS	boron sulfide	rBS	1.609		1.624	0.015	1	2
SiH3Cl	chlorosilane	rSiCl	2.051		2.066	0.015	1	2
AlC	Aluminum carbide	rC=Al	1.955		1.971	0.016	1	2
C4H6	Methylenecyclopropane	rCC	1.457		1.473	0.016	2	5
AlS	Aluminum sulfide	rAlS	2.029		2.045	0.016	1	2
CH3COCl	Acetyl Chloride	rCCl	1.798		1.814	0.016	1	4
SiH	Silylidyne	rSiH	1.520		1.537	0.017	1	2
CH2FCl	fluorochloromethane	rCCl	1.762	±0.000	1.779	0.017	1	3
CH3OC2H5	Ethane, methoxy-	rCO	1.407	±0.004	1.424	0.017	2	3
C2H2	Acetylene	rC#C	1.203		1.220	0.017	1	2
HF+	hydrogen fluoride cation	rHF	1.014		1.032	0.017	1	2
H2CS	Thioformaldehyde	rC=S	1.611		1.628	0.017	1	2
GaAs	Gallium arsenide	rGa#As	2.530	±0.020	2.548	0.018	1	2
CH3OCHO	methyl formate	rCO	1.334		1.352	0.018	2	3
HCCl	Chloromethylene	rCCl	1.696	±0.003	1.714	0.018	1	2
C4H8O2	Ethyl acetate	rCO	1.345		1.363	0.018	2	3
C2H6O2S	Dimethyl sulfone	rCS	1.777	±0.006	1.795	0.018	1	4
DF	Hydrofluoric acid-d	rDF	0.917	±0.000	0.935	0.018	1	2
Si(CH3)4	tetramethylsilane	rSiC	1.875	±0.002	1.893	0.018	1	2
BF3	Borane, trifluoro-	rBF	1.307		1.325	0.018	1	2
CH3CH2OH	Ethanol	rCH	1.086		1.104	0.018	2	8
CH3CH2O	Ethoxy radical	rCH	1.088		1.106	0.018	2	7
SiH2F2	difluorosilane	rSiH	1.462		1.479	0.018	1	4
HF	Hydrogen fluoride	rHF	0.917	±0.000	0.935	0.018	1	2
BO	boron monoxide	rB=O	1.205		1.223	0.018	1	2
CH2F2	Methane, difluoro-	rCF	1.351	±0.001	1.369	0.018	1	4
CH3COCl	Acetyl Chloride	rC=O	1.187		1.205	0.018	1	3
CBr4	Carbon tetrabromide	rCBr	1.942	±0.002	1.960	0.018	1	2
HS-	mercapto anion	rSH	1.343		1.362	0.018	1	2
NaBr	Sodium Bromide	rNaBr	2.502	±0.000	2.520	0.018	1	2
NH2CONH2	Urea	rNH	0.998		1.016	0.019	4	8
HNCNH	diiminomethane	rC=N	1.224	±0.001	1.243	0.019	1	2
SiH2Cl2	dichlorosilane	rSiCl	2.033	±0.003	2.052	0.019	1	4
CHF3	Methane, trifluoro-	rCF	1.328	±0.003	1.347	0.019	1	3
HOBr	Hypobromous acid	rOH	0.961		0.980	0.019	1	2
AsF3	Arsenic trifluoride	rAsF	1.706	±0.002	1.725	0.019	1	2
TiCl	Titanium Monochloride	rClTi	2.265	±0.000	2.284	0.019	1	2
AlF	Aluminum monofluoride	rAlF	1.654	±0.000	1.674	0.019	1	2
CH3SeH	Methane selenol	rSeH	1.473	±0.020	1.493	0.020	1	3
SiCl	Clorosilylidyne	rSiCl	2.061	±0.000	2.081	0.020	1	2
SCSe	Carbon sulfide selenide	rC=Se	1.695	±0.002	1.715	0.020	1	3
LiOH	lithium hydroxide	rLiO	1.582		1.602	0.020	1	2
C10H8	Azulene	rC:C	1.377		1.397	0.020	5	7
CCl2O	Phosgene	rCCl	1.737		1.757	0.020	2	3
AlH	aluminum monohydride	rAlH	1.648		1.668	0.020	1	2
CH3ONO	Methyl nitrite	rNO	1.398		1.418	0.020	2	6
BF	Boron monofluoride	rBF	1.267	±0.000	1.287	0.020	1	2
ClCN	chlorocyanogen	rCCl	1.629		1.649	0.020	1	2
C4H8O2	Ethyl acetate	rC=O	1.203		1.224	0.021	2	4
BeF	Beryllium monofluoride	rBeF	1.361		1.382	0.021	1	2
C10H8	Azulene	rC:C	1.484		1.505	0.021	7	8
SiHCl3	Trichlorosilane	rSiCl	2.020		2.041	0.021	1	3
C2H	Ethynyl radical	rCH	1.047		1.068	0.022	1	3
HSe	Selenium monohydride	rSeH	1.475	±0.010	1.497	0.022	1	2
CHF2Cl	difluorochloromethane	rCCl	1.747	±0.010	1.769	0.022	1	3
AsF	Arsenic monofluoride	rFAs	1.736	±0.001	1.758	0.022	1	2
CH2NN	diazomethane	rN=N	1.139		1.161	0.022	2	3
MgCl	magnesium monochloride	rMgCl	2.199		2.222	0.023	1	2
CCl2O	Phosgene	rC=O	1.177		1.199	0.023	1	2
LiNH2	lithium amide	rLiN	1.736	±0.003	1.759	0.023	1	2
NF	nitrogen fluoride	rNF	1.317		1.340	0.023	1	2
As4	Arsenic tetramer	rAsAs	2.435		2.458	0.023	1	2
CF	Fluoromethylidyne	rCF	1.276		1.300	0.024	1	2
OH-	hydroxide anion	rOH	0.964		0.988	0.024	1	2
C3H5	Allyl radical	rCH	1.069		1.093	0.024	1	2
CF3COOH	trifluoroacetic acid	rC=O	1.192	±0.003	1.216	0.024	2	4
CBrClF2	Methane, bromochlorodifluoro-	rCBr	1.932	±0.004	1.956	0.024	1	2
ClCN	chlorocyanogen	rC#N	1.161		1.184	0.024	2	3
SCSe	Carbon sulfide selenide	rC=S	1.553	±0.002	1.577	0.024	1	2
CSe2	Carbon diselenide	rC=Se	1.692	±0.000	1.716	0.024	1	2
COBr2	Carbonic dibromide	rC=O	1.172	±0.003	1.196	0.024	1	2
HNO3	Nitric acid	rNO	1.406		1.431	0.025	1	2
SF4	Sulfur tetrafluoride	rSF	1.646	±0.003	1.671	0.025	1	2
HBr+	hydrogen bromide cation	rHBr	1.448		1.474	0.025	1	2
LiBr	Lithium Bromide	rLiBr	2.170	±0.000	2.196	0.025	1	2
GaF	Gallium monofluoride	rFGa	1.774	±0.000	1.800	0.026	1	2
AsH	Arsenic monohydride	rAsH	1.535	±0.001	1.560	0.026	1	2
SiBr+	Silicon monobromide cation	rSiBr	2.095	±0.000	2.121	0.026	1	2
F2	Fluorine diatomic	rFF	1.412		1.438	0.026	1	2
SiH3F	monofluorosilane	rSiF	1.595		1.621	0.026	1	2
FNO2	Nitryl fluoride	rN=O	1.180	±0.005	1.206	0.026	1	3
CN-	cyanide anion	rC#N	1.177	±0.004	1.204	0.027	1	2
CH2CO	Ketene	rC=O	1.162		1.189	0.027	2	3
CH2Br2	dibromomethane	rCBr	1.925	±0.002	1.952	0.027	1	4
CCl2	dichloromethylene	rCCl	1.711		1.739	0.028	1	2
HNCO	Isocyanic acid	rC=O	1.164		1.191	0.028	3	4
SiF	silicon monofluoride	rSiF	1.604		1.632	0.028	1	2
CHBr3	bromoform	rCBr	1.924	±0.005	1.952	0.028	1	3
Si2	Silicon diatomic	rSiSi	2.246		2.274	0.028	1	2
HBr	hydrogen bromide	rHBr	1.414	±0.000	1.443	0.029	1	2
BrF5	bromine pentafluoride	rFBr	1.774	±0.003	1.803	0.029	1	3
BeS	beryllium sulfide	rBe=S	1.742		1.770	0.029	1	2
CH3NC	methyl isocyanide	rC#N	1.166	±0.003	1.195	0.029	2	3
ClO	Monochlorine monoxide	rClO	1.596	±0.001	1.625	0.029	1	2
OCSe	Carbonyl selenide	rC=O	1.159		1.188	0.029	1	2
HSSSH	trisulfane	rSS	2.054	±0.000	2.083	0.029	1	2
CH3Br	methyl bromide	rCBr	1.934	±0.000	1.963	0.029	1	2
MgS	magnesium sulfide	rMgS	2.143		2.172	0.030	1	2
CCl	carbon monochloride	rCCl	1.649		1.679	0.030	1	2
BrF3	Bromine trifluoride	rFBr	1.810	±0.000	1.840	0.030	1	3
H2Se	Hydrogen selenide	rSeH	1.460		1.491	0.031	1	2
N2	Nitrogen diatomic	rN#N	1.098		1.128	0.031	1	2
C5H8O	Cyclopentanone	rCC	1.504		1.535	0.031	2	3
CO	Carbon monoxide	rC#O	1.128	±0.000	1.159	0.031	1	2
SiF2	Silicon difluoride	rFSi	1.590	±0.000	1.621	0.031	1	2
CH3ONO	Methyl nitrite	rN=O	1.182		1.213	0.031	6	7
MgH	magnesium monohydride	rMgH	1.730		1.761	0.031	1	2
NSe	Nitrogen monoselenide	rN=Se	1.652		1.683	0.032	1	2
CaOH	Calcium monohydroxide	rOH	0.930	±0.007	0.962	0.032	2	3
CH2O2	Dioxirane	rOO	1.516	±0.003	1.548	0.032	4	5
PCl	phosphorus chloride	rPCl	2.018		2.050	0.033	1	2
O2	Oxygen diatomic	rO=O	1.208		1.240	0.033	1	2
F2O	Difluorine monoxide	rFO	1.405		1.438	0.033	1	2
SOF4	Sulfur tetrafluoride oxide	rFS	1.596	±0.003	1.630	0.034	1	3
SiS	silicon monosulfide	rSiS	1.929	±0.000	1.963	0.034	1	2
NaCl	Sodium Chloride	rNaCl	2.361	±0.000	2.395	0.034	1	2
C3O2	Carbon suboxide	rC=C	1.251		1.286	0.035	1	2
HOCl	hypochlorous acid	rClO	1.697	±0.001	1.732	0.035	1	3
AsF5	Arsenic pentafluoride	rAsF	1.656	±0.004	1.691	0.035	1	2
GeCl	Germanium monochloride	rClGe	2.164	±0.000	2.198	0.035	1	2
PF2	Phosphorus difluoride	rPF	1.579		1.615	0.036	1	2
ClOF3	Chlorine trifluoride oxide	rFCl	1.713	±0.003	1.749	0.036	1	4
PF	phosphorus monofluoride	rFP	1.593		1.628	0.036	1	2
N2O3	Dinitrogen trioxide	rN=O	1.202		1.238	0.036	2	4
AsH3	Arsine	rAsH	1.511	±0.000	1.548	0.037	1	2
CS	carbon monosulfide	rC#S	1.535		1.572	0.037	1	2
BrF	Bromine monofluoride	rFBr	1.759	±0.000	1.796	0.037	1	2
SOCl2	thionyl chloride	rS=O	1.443	±0.006	1.481	0.038	1	2
P2	Phosphorus diatomic	rP#P	1.893		1.932	0.038	1	2
KrH+	Protonated Krypton	rHKr	1.421	±0.000	1.459	0.038	1	2
SCl2	Sulfur dichloride	rSCl	2.013	±0.001	2.051	0.038	1	2
SF	Monosulfur monofluoride	rSF	1.599		1.638	0.039	1	2
GeH	germylidene	rGeH	1.588		1.627	0.039	1	2
GeS	Germanium monosulfide	rS=Ge	2.012	±0.000	2.051	0.039	1	2
Se2	Selenium diatomic	rSe=Se	2.166	±0.001	2.205	0.039	1	2
S2	Sulfur diatomic	rS=S	1.889		1.929	0.039	1	2
AlO	Aluminum monoxide	rAlO	1.618		1.657	0.040	1	2
MgH+	magnesium monohydride cation	rMgH	1.652		1.692	0.040	1	2
C2	Carbon diatomic	rC=C	1.243		1.282	0.040	1	2
SeO	Selenium monoxide	rSeO	1.639	±0.001	1.680	0.041	1	2
S2+	sulfur diatomic cation	rS=S	1.825	±0.010	1.866	0.041	1	2
SCl	sulfur monochloride	rSCl	1.975		2.017	0.042	1	2
NaH	sodium hydride	rNaH	1.887	±0.000	1.929	0.042	1	2
C2Cl2	dichloroacetylene	rCCl	1.612	±0.030	1.654	0.042	1	3
PO2	Phosphorus dioxide	rP=O	1.467		1.509	0.042	1	2
FNO2	Nitryl fluoride	rNF	1.467	±0.015	1.509	0.042	1	2
F2SO	Thionyl Fluoride	rO=S	1.413	±0.000	1.455	0.043	1	2
HClO4	perchloric acid	rO=Cl	1.414	±0.001	1.457	0.043	1	2
ClF	Chlorine monofluoride	rFCl	1.628	±0.000	1.672	0.043	1	2
NO+	nitric oxide cation	rN=O	1.066		1.111	0.045	1	2
C2H6O2S	Dimethyl sulfone	rS=O	1.431	±0.004	1.476	0.045	1	2
As2	Arsenic diatomic	rAs#As	2.103		2.148	0.045	1	2
AlN	Aluminum nitride	rN#Al	1.786		1.832	0.046	1	2
BrF3	Bromine trifluoride	rFBr	1.721		1.767	0.046	1	2
HOBr	Hypobromous acid	rBrO	1.834		1.880	0.046	2	3
PN	Phosphorus mononitride	rP#N	1.491		1.538	0.047	1	2
MgOH	magnesium hydroxide	rMgO	1.767		1.814	0.047	1	2
Cl2	Chlorine diatomic	rClCl	1.988		2.035	0.047	1	2
C3O2	Carbon suboxide	rC=O	1.146		1.194	0.048	2	4
KBr	Potassium Bromide	rKBr	2.821	±0.000	2.869	0.048	1	2
SO	Sulfur monoxide	rS=O	1.481		1.529	0.048	1	2
GeF	Germanium monofluoride	rFGe	1.745		1.793	0.048	1	2
LiCl	lithium chloride	rLiCl	2.021	±0.000	2.069	0.049	1	2
F2SO	Thionyl Fluoride	rFS	1.585	±0.000	1.634	0.049	1	3
PO-	phosphorus monoxide anion	rOP	1.540		1.589	0.049	1	2
BrCl	Bromine monochloride	rClBr	2.136	±0.000	2.185	0.049	1	2
PF+	phosphorus monofluoride cation	rFP	1.500		1.549	0.049	1	2
SF4	Sulfur tetrafluoride	rSF	1.545	±0.003	1.594	0.049	1	4
Br2	Bromine diatomic	rBrBr	2.281		2.331	0.050	1	2
BrO	Bromine monoxide	rOBr	1.718		1.768	0.050	1	2
CSe	Carbon monoselenide	rC=Se	1.676	±0.000	1.726	0.050	1	2
CFCl	chlorofluoromethylene	rCCl	1.714		1.764	0.050	1	3
SSO	Disulfur monoxide	rS=S	1.884		1.935	0.051	2	3
O2+	diatomic oxygen cation	rOO	1.116		1.169	0.052	1	2
LiH	Lithium Hydride	rLiH	1.595	±0.000	1.649	0.054	1	2
SOF4	Sulfur tetrafluoride oxide	rFS	1.539	±0.003	1.594	0.055	1	5
NS+	nitrogen sulfide cation	rNS	1.440		1.497	0.057	1	2
BrF5	bromine pentafluoride	rFBr	1.689	±0.008	1.746	0.057	1	2
N2O3	Dinitrogen trioxide	rN=O	1.142		1.200	0.058	1	3
SiP	Silicon monophosphide	rSiP	2.078	±0.002	2.136	0.058	1	2
SiO	Silicon monoxide	rSiO	1.510	±0.000	1.569	0.060	1	2
GeF+	Germanium monofluoride cation	rFGe	1.665	±0.000	1.727	0.061	1	2
SO+	sulfur monoxide cation	rO=S	1.424		1.487	0.063	1	2
HClO4	perchloric acid	rO=Cl	1.404	±0.001	1.468	0.064	1	4
SeO2	Selenium dioxide	rSeO	1.607	±0.001	1.674	0.067	1	2
C4H8O2	Ethyl acetate	rCO	1.448		1.516	0.068	5	6
NaLi	lithium sodium	rLiNa	2.889		2.958	0.069	1	2
SSO	Disulfur monoxide	rS=O	1.456		1.526	0.070	1	2
HClO4	perchloric acid	rOCl	1.641	±0.002	1.712	0.071	1	3
Li2	Lithium diatomic	rLiLi	2.673		2.748	0.075	1	2
KCl	Potassium Chloride	rKCl	2.667	±0.000	2.742	0.075	1	2
CaF	Calcium monofluoride	rFCa	1.967	±0.001	2.046	0.079	1	2
He2+	helium diatomic cation	rHeHe	1.081	±0.001	1.161	0.080	1	2
ClOF3	Chlorine trifluoride oxide	rFCl	1.603	±0.004	1.689	0.086	1	3
KH	Potassium hydride	rKH	2.243	±0.001	2.332	0.090	1	2
CaOH	Calcium monohydroxide	rOCa	1.976	±0.004	2.078	0.102	1	2
BeO	beryllium oxide	rBe=O	1.331		1.455	0.124	1	2
CaCl	calcium monochloride	rClCa	2.437		2.568	0.131	1	2
CaO	Calcium monoxide	rOCa	1.822		1.958	0.136	1	2
CaH	Calcium monohydride	rCaH	2.003	±0.000	2.142	0.140	1	2
GeO	Germanium monoxide	rOGe	1.625		1.770	0.146	1	2
CrH	Chromium hydride	rHCr	1.655	±0.001	1.802	0.147	1	2
FO	Oxygen monofluoride	rFO	1.354		1.503	0.149	1	2
Al2Cl6	Aluminum, di-μ-chlorotetrachlorodi-	rAlCl	2.040	±0.040	2.271	0.231	1	3
C4H10O	Methyl propyl ether	rCH	1.099		1.420	0.321	1	2
LiOH	lithium hydroxide	rOH	0.969		2.564	1.594	1	3
MgOH	magnesium hydroxide	rOH	0.940		2.607	1.667	1	3

427 molecules.