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 PBE1PBE/6-31G**

Species	Name	Bond type	Bond Length (Å)
			Experimental	unc.	Calculated	Difference	atom1	atom2
C4H10O	Methyl propyl ether	rCC	1.530		1.096	-0.434	5	13
FNO2	Nitryl fluoride	rNF	1.467	±0.015	1.428	-0.039	1	2
NaF	sodium fluoride	rNaF	1.926	±0.000	1.889	-0.037	1	2
C5H8O	Methyl cyclopropyl ketone	rCH	1.126		1.091	-0.035	3	7
C5H6	Propellane	rCC	1.596	±0.005	1.566	-0.030	2	5
GaAs	Gallium arsenide	rGa#As	2.530	±0.020	2.503	-0.027	1	2
F2	Fluorine diatomic	rFF	1.412		1.385	-0.027	1	2
As4	Arsenic tetramer	rAsAs	2.435		2.409	-0.026	1	2
ScH	Scandium monohydride	rScH	1.775	±0.000	1.751	-0.024	1	2
C2H2O2	Ethanedial	rCH	1.132		1.109	-0.023	1	3
HNO3	Nitric acid	rNO	1.406		1.386	-0.020	1	2
C9H8	Indene	rCC	1.415	±0.170	1.395	-0.020	1	2
C3F6	hexafluoropropene	rCF	1.329	±0.003	1.309	-0.020	1	4
CH3CH2CH2CH3	Butane	rCH	1.117		1.099	-0.018	1	5
FO	Oxygen monofluoride	rFO	1.354		1.337	-0.017	1	2
H2CSe	Selenoformaldehyde	rC=Se	1.753		1.737	-0.016	1	2
CH3NH2	methyl amine	rCN	1.471	±0.003	1.455	-0.016	1	2
HO2	Hydroperoxy radical	rOO	1.331		1.315	-0.016	1	2
CH3OC2H5	Ethane, methoxy-	rCO	1.415	±0.005	1.399	-0.016	1	2
TiCl	Titanium Monochloride	rClTi	2.265	±0.000	2.249	-0.015	1	2
C5H6	Propellane	rCC	1.525	±0.002	1.510	-0.015	1	2
C4H8O2	Ethyl acetate	rCH	1.105		1.090	-0.015	1	7
LiOH	lithium hydroxide	rOH	0.969		0.955	-0.014	1	3
H2Cl+	dihydrogen monochloride cation	rHCl	1.321	±0.000	1.308	-0.013	1	2
C10H8	Azulene	rC:C	1.414		1.402	-0.013	7	9
C4H6	Bicyclo[1.1.0]butane	rCC	1.497		1.485	-0.012	1	2
CH3OCH3	Dimethyl ether	rCO	1.411	±0.001	1.400	-0.011	1	2
LiF	lithium fluoride	rLiF	1.564	±0.000	1.553	-0.011	1	2
C5H8	Ethenylcyclopropane	rCH	1.099		1.088	-0.011	1	6
SCSe	Carbon sulfide selenide	rC=Se	1.695	±0.002	1.684	-0.011	1	3
OCSe	Carbonyl selenide	rC=Se	1.709		1.698	-0.011	1	3
HS+	sulfur monohydride cation	rSH	1.374		1.364	-0.010	1	2
CSe2	Carbon diselenide	rC=Se	1.692	±0.000	1.682	-0.010	1	2
CBr4	Carbon tetrabromide	rCBr	1.942	±0.002	1.932	-0.010	1	2
CH3CH2CHO	Propanal	rCH	1.103		1.094	-0.009	1	6
C2H	Ethynyl radical	rC#C	1.217		1.209	-0.008	1	2
C3H3NO	Oxazole	rCO	1.370	±0.002	1.362	-0.008	1	5
C3H3NO	Oxazole	rCO	1.357	±0.003	1.350	-0.008	1	2
CF3COOH	trifluoroacetic acid	rCC	1.546	±0.005	1.538	-0.008	1	2
HeH+	Helium hydride cation	rHHe	0.790		0.782	-0.008	1	2
C2H2O2	Ethanedial	rCC	1.526		1.519	-0.007	1	2
ArH+	Argon hydride cation	rArH	1.292	±0.000	1.286	-0.006	1	2
B2H6	Diborane	rBH	1.200		1.194	-0.006	1	5
CH2CHCH2CH3	1-Butene	rCC	1.536		1.530	-0.006	1	2
BeO	beryllium oxide	rBe=O	1.331		1.325	-0.006	1	2
CH3CH2CH2CH3	Butane	rCC	1.531		1.526	-0.005	1	2
C8H8	cubane	rCH	1.097		1.092	-0.005	1	9
C4H8O2	Ethyl acetate	rCC	1.515		1.510	-0.005	5	6
O2	Oxygen diatomic	rO=O	1.208		1.203	-0.005	1	2
CH3CH2CHO	Propanal	rCC	1.509		1.504	-0.005	2	3
CH3CH2CHO	Propanal	rCC	1.523		1.518	-0.005	1	2
CH2NH	Methanimine	rCH	1.103		1.098	-0.005	1	3
NSe	Nitrogen monoselenide	rN=Se	1.652		1.648	-0.004	1	2
CH3CH2CHO	Propanal	rCH	1.105		1.101	-0.004	2	8
C4H8O2	Ethyl acetate	rCC	1.508		1.504	-0.004	1	2
CH2	Methylene	rCH	1.085		1.081	-0.004	1	2
O2+	diatomic oxygen cation	rOO	1.116		1.112	-0.004	1	2
C10H8	Azulene	rC:C	1.405	±0.001	1.401	-0.004	2	9
CSe	Carbon monoselenide	rC=Se	1.676	±0.000	1.672	-0.004	1	2
SiC	silicon monocarbide	rCSi	1.722		1.718	-0.004	1	2
CH3CH2OH	Ethanol	rCH	1.098		1.095	-0.003	1	6
C10H8	Azulene	rC:C	1.398		1.395	-0.003	1	3
BN	boron nitride	rB=N	1.325		1.322	-0.003	1	2
B2H6	Diborane	rBH	1.320		1.317	-0.003	1	3
GaBr	Gallium monobromide	rGaBr	2.352	±0.000	2.350	-0.003	1	2
CH2PH	Phosphaethene	rCH	1.090	±0.015	1.087	-0.003	1	3
C3H6O	2-Propen-1-ol	rCH	1.091	±0.010	1.088	-0.003	3	9
C3H6O	2-Propen-1-ol	rCH	1.092	±0.010	1.090	-0.002	2	7
C2H2+	acetylene cation	rC=C	1.253	±0.001	1.250	-0.002	1	2
CH3NH2	methyl amine	rNH	1.018	±0.001	1.016	-0.002	2	6
N3	azide radical	rNN	1.181		1.179	-0.002	1	2
C5H8	Ethenylcyclopropane	rCC	1.475		1.473	-0.002	1	2
CH3CH2CHO	Propanal	rCH	1.096		1.094	-0.002	1	5
GeBr4	Germanium tetrabromide	rGeBr	2.272	±0.001	2.270	-0.002	1	2
SiH2Cl2	dichlorosilane	rSiH	1.480	±0.015	1.478	-0.002	1	2
HClO4	perchloric acid	rOH	0.980		0.978	-0.002	3	6
NH4+	ammonium cation	rHN	1.029	±0.000	1.027	-0.002	1	2
HOCl	hypochlorous acid	rOH	0.973	±0.002	0.971	-0.002	1	2
CH2PH	Phosphaethene	rCH	1.090	±0.015	1.088	-0.002	1	4
NO	Nitric oxide	rN=O	1.154	±0.000	1.152	-0.002	1	2
HCCl	Chloromethylene	rCH	1.119	±0.036	1.117	-0.002	1	3
Se2	Selenium diatomic	rSe=Se	2.166	±0.001	2.165	-0.001	1	2
CH3CH2CHO	Propanal	rCH	1.115		1.114	-0.001	3	10
CN	Cyano radical	rC#N	1.172		1.171	-0.001	1	2
PN	Phosphorus mononitride	rP#N	1.491		1.490	-0.001	1	2
CH3OC2H5	Ethane, methoxy-	rCO	1.407	±0.004	1.406	-0.001	2	3
LiBr	Lithium Bromide	rLiBr	2.170	±0.000	2.169	-0.001	1	2
C5H8O	Methyl cyclopropyl ketone	rCC	1.510		1.509	-0.001	2	3
H2CSe	Selenoformaldehyde	rHC	1.090		1.090	-0.001	1	3
CH3CHO	Acetaldehyde	rCH	1.114		1.113	-0.001	1	4
C4H8O2	Ethyl acetate	rCO	1.345		1.345	0.000	2	3
H2CS	Thioformaldehyde	rC=S	1.611		1.610	0.000	1	2
CH3CCH	propyne	rCH	1.096		1.096	0.000	1	5
CH3NO	nitrosomethane	rCH	1.094		1.094	0.000	1	4
CH2CO	Ketene	rCH	1.083		1.082	0.000	1	4
C3H6	Cyclopropane	rCC	1.501		1.501	0.000	1	2
P2	Phosphorus diatomic	rP#P	1.893		1.894	0.000	1	2
C3F6	hexafluoropropene	rC=C	1.329	±0.003	1.330	0.001	1	2
OCSe	Carbonyl selenide	rC=O	1.159		1.160	0.001	1	2
CH3CHS	Thioacetaldehyde	rCH	1.098		1.099	0.001	2	6
CH3CHFCH3	2-Fluoropropane	rCH	1.093	±0.006	1.094	0.001	4	8
SCSe	Carbon sulfide selenide	rC=S	1.553	±0.002	1.554	0.001	1	2
HNCNH	diiminomethane	rC=N	1.224	±0.001	1.225	0.001	1	2
ClOF3	Chlorine trifluoride oxide	rFCl	1.713	±0.003	1.714	0.001	1	4
CH2F2	Methane, difluoro-	rCF	1.351	±0.001	1.352	0.001	1	4
CH3CHFCH3	2-Fluoropropane	rCH	1.094	±0.005	1.095	0.001	4	10
CH3CHS	Thioacetaldehyde	rCH	1.090		1.092	0.002	2	5
C2H2	Acetylene	rC#C	1.203		1.204	0.002	1	2
C2H2ClF	1-chloro-1-fluoroethylene	rCH	1.082	±0.001	1.084	0.002	2	5
CHF3	Methane, trifluoro-	rCH	1.091	±0.014	1.093	0.002	1	2
FNO2	Nitryl fluoride	rN=O	1.180	±0.005	1.182	0.002	1	3
C3H8	Propane	rCH	1.096		1.098	0.002	1	4
GeS	Germanium monosulfide	rS=Ge	2.012	±0.000	2.014	0.002	1	2
CO+	carbon monoxide cation	rC=O	1.115	±0.000	1.117	0.002	1	2
C4H8	cyclobutane	rCH	1.093		1.096	0.002	1	5
CH2Br2	dibromomethane	rCBr	1.925	±0.002	1.927	0.002	1	4
CH3OC2H5	Ethane, methoxy-	rCH	1.092	±0.007	1.094	0.002	4	11
C3H6O	2-Propen-1-ol	rCH	1.102	±0.020	1.104	0.002	1	6
BO	boron monoxide	rB=O	1.205		1.207	0.002	1	2
H2	Hydrogen diatomic	rHH	0.741		0.744	0.002	1	2
HCl+	hydrogen chloride cation	rHCl	1.315		1.317	0.002	1	2
CH3CHClCH3	Propane, 2-chloro-	rCH	1.091		1.094	0.003	2	5
NO+	nitric oxide cation	rN=O	1.066		1.069	0.003	1	2
C10H8	naphthalene	rC:C	1.410		1.413	0.003	2	3
C3H6	Cyclopropane	rCH	1.083		1.086	0.003	1	4
CF	Fluoromethylidyne	rCF	1.276		1.280	0.003	1	2
CH2Cl2	Methylene chloride	rCH	1.085	±0.002	1.089	0.004	1	2
CH3OC2H5	Ethane, methoxy-	rCH	1.099	±0.007	1.103	0.004	1	6
CH3OCH3	Dimethyl ether	rCH	1.099	±0.001	1.103	0.004	2	6
C4H8	cyclobutane	rCH	1.091		1.095	0.004	1	6
C10H8	Azulene	rCH	1.084		1.088	0.004	4	14
CH3Br	methyl bromide	rCBr	1.934	±0.000	1.938	0.004	1	2
HOCl	hypochlorous acid	rClO	1.697	±0.001	1.701	0.004	1	3
HF	Hydrogen fluoride	rHF	0.917	±0.000	0.921	0.004	1	2
CH3NO	nitrosomethane	rCH	1.092		1.096	0.004	1	5
ClO	Monochlorine monoxide	rClO	1.596	±0.001	1.600	0.004	1	2
CH2Cl2	Methylene chloride	rCCl	1.767	±0.002	1.771	0.004	1	4
C10H8	Azulene	rCH	1.080		1.084	0.004	9	17
C2H2	Acetylene	rCH	1.063		1.067	0.004	1	3
LiNH2	lithium amide	rLiN	1.736	±0.003	1.740	0.004	1	2
CH3OC2H5	Ethane, methoxy-	rCH	1.100	±0.003	1.104	0.004	3	8
CH3CHClCH3	Propane, 2-chloro-	rCH	1.092		1.097	0.005	3	6
CH2CHF	Ethene, fluoro-	rCH	1.082		1.087	0.005	1	4
AlBr	Aluminum monobromide	rAlBr	2.295		2.300	0.005	1	2
C4H8O2	Ethyl acetate	rC=O	1.203		1.208	0.005	2	4
SiP	Silicon monophosphide	rSiP	2.078	±0.002	2.082	0.005	1	2
N2	Nitrogen diatomic	rN#N	1.098		1.103	0.005	1	2
NH2SH	Thiohydroxylamine	rSH	1.344	±0.029	1.349	0.005	2	3
LiOH	lithium hydroxide	rLiO	1.582		1.587	0.005	1	2
C3H3NO	Oxazole	rCH	1.073	±0.001	1.078	0.005	5	8
BF	Boron monofluoride	rBF	1.267	±0.000	1.272	0.005	1	2
C3H3NO	Oxazole	rCH	1.075	±0.001	1.080	0.005	2	6
CH2CO	Ketene	rC=O	1.162		1.167	0.005	2	3
OH	Hydroxyl radical	rOH	0.970		0.975	0.005	1	2
C3H3NO	Oxazole	rCH	1.075	±0.001	1.081	0.005	4	7
CH2CHCH2CH3	1-Butene	rCC	1.493		1.498	0.005	2	3
CH4	Methane	rCH	1.087	±0.001	1.093	0.006	1	2
CN-	cyanide anion	rC#N	1.177	±0.004	1.183	0.006	1	2
CHF3	Methane, trifluoro-	rCF	1.328	±0.003	1.334	0.006	1	3
CHONH2	formamide	rNH	1.001		1.007	0.006	3	6
CH3OC2H5	Ethane, methoxy-	rCH	1.089	±0.008	1.095	0.006	4	10
CH3CHO	Acetaldehyde	rCH	1.086		1.092	0.006	2	5
C3H6O	2-Propen-1-ol	rCH	1.096	±0.030	1.102	0.006	1	5
AsF	Arsenic monofluoride	rFAs	1.736	±0.001	1.742	0.006	1	2
BH3	boron trihydride	rBH	1.190		1.196	0.006	1	2
GaF	Gallium monofluoride	rFGa	1.774	±0.000	1.781	0.006	1	2
NaH	sodium hydride	rNaH	1.887	±0.000	1.893	0.006	1	2
CH3Br	methyl bromide	rCH	1.082	±0.001	1.089	0.007	1	3
C3H4	cyclopropene	rCH	1.088		1.095	0.007	1	6
C2H2+	acetylene cation	rCH	1.077	±0.005	1.083	0.007	1	3
HSiCl	Chlorosilylene	rSiH	1.525	±0.005	1.532	0.007	1	3
CH3CHS	Thioacetaldehyde	rCH	1.089		1.096	0.007	1	4
H2O	Water	rOH	0.958	±0.000	0.965	0.007	1	2
CH3CCH	propyne	rCH	1.060		1.067	0.007	3	4
CO	Carbon monoxide	rC#O	1.128	±0.000	1.135	0.007	1	2
CH3CHFCH3	2-Fluoropropane	rCH	1.092		1.099	0.007	1	3
Br2	Bromine diatomic	rBrBr	2.281		2.288	0.007	1	2
CH3CH2OH	Ethanol	rCH	1.088		1.095	0.007	1	5
CF3COOH	trifluoroacetic acid	rC=O	1.192	±0.003	1.199	0.007	2	4
CH3CHFCH3	2-Fluoropropane	rCH	1.088	±0.006	1.095	0.007	4	6
BF3	Borane, trifluoro-	rBF	1.307		1.314	0.007	1	2
CH3OC2H5	Ethane, methoxy-	rCH	1.086	±0.010	1.093	0.007	1	5
C10H8	Azulene	rCH	1.083		1.090	0.007	5	15
CH2CHF	Ethene, fluoro-	rCH	1.077		1.085	0.008	2	5
C3H4	cyclopropene	rCH	1.072		1.080	0.008	2	4
CrH	Chromium hydride	rHCr	1.655	±0.001	1.663	0.008	1	2
C10H8	Azulene	rCH	1.081		1.089	0.008	1	11
PS	phosphorus sulfide	rP=S	1.900		1.908	0.008	1	2
CH3OCH3	Dimethyl ether	rCH	1.085	±0.001	1.093	0.008	2	4
SiH4	Silane	rSiH	1.480	±0.000	1.488	0.008	1	2
C10H8	Azulene	rC:C	1.484		1.492	0.008	7	8
CHONH2	formamide	rNH	1.001		1.009	0.008	3	5
SeO2	Selenium dioxide	rSeO	1.607	±0.001	1.615	0.008	1	2
SeCl2	Selenium Dichloride	rClSe	2.157	±0.003	2.165	0.008	1	2
C3H6O	2-Propen-1-ol	rCH	1.078	±0.010	1.086	0.008	3	8
CH3CSNH2	Ethanethioamide	rC=S	1.647	±0.002	1.655	0.008	1	2
SiH3Cl	chlorosilane	rSiH	1.475		1.484	0.009	1	3
HCl	Hydrogen chloride	rHCl	1.275	±0.000	1.284	0.009	1	2
HS	Mercapto radical	rSH	1.341		1.350	0.009	1	2
NS	Mononitrogen monosulfide	rNS	1.497	±0.000	1.506	0.009	1	2
HO2	Hydroperoxy radical	rOH	0.971		0.980	0.009	1	3
SiO	Silicon monoxide	rSiO	1.510	±0.000	1.519	0.009	1	2
HOBr	Hypobromous acid	rBrO	1.834		1.843	0.009	2	3
C2H3	vinyl	rCH	1.085		1.095	0.010	2	4
HOBr	Hypobromous acid	rOH	0.961		0.971	0.010	1	2
BrF	Bromine monofluoride	rFBr	1.759	±0.000	1.769	0.010	1	2
NO-	nitric oxide anion	rN=O	1.258	±0.010	1.268	0.010	1	2
AlF	Aluminum monofluoride	rAlF	1.654	±0.000	1.665	0.010	1	2
SiH3F	monofluorosilane	rSiH	1.476		1.486	0.010	1	3
SeO	Selenium monoxide	rSeO	1.639	±0.001	1.650	0.010	1	2
HSe	Selenium monohydride	rSeH	1.475	±0.010	1.485	0.010	1	2
BeH2	beryllium dihydride	rBeH	1.326	±0.000	1.337	0.011	1	2
LiO	lithium oxide	rLiO	1.688		1.699	0.011	1	2
PH	phosphorus monohydride	rPH	1.422		1.433	0.011	1	2
HCCl	Chloromethylene	rCCl	1.696	±0.003	1.707	0.011	1	2
C2	Carbon diatomic	rC=C	1.243		1.254	0.011	1	2
SiS	silicon monosulfide	rSiS	1.929	±0.000	1.940	0.011	1	2
CH3NH2	methyl amine	rCH	1.093	±0.000	1.104	0.011	1	3
SiBr+	Silicon monobromide cation	rSiBr	2.095	±0.000	2.107	0.011	1	2
AsH	Arsenic monohydride	rAsH	1.535	±0.001	1.546	0.011	1	2
SF4	Sulfur tetrafluoride	rSF	1.646	±0.003	1.657	0.011	1	2
SO+	sulfur monoxide cation	rO=S	1.424		1.436	0.012	1	2
CH2F2	Methane, difluoro-	rCH	1.084	±0.003	1.096	0.012	1	2
C10H8	Azulene	rC:C	1.377		1.389	0.012	5	7
CH	Methylidyne	rCH	1.120		1.132	0.012	1	2
OPCl	Phosphorus oxychloride	rP=O	1.462	±0.011	1.474	0.012	1	2
NaCl	Sodium Chloride	rNaCl	2.361	±0.000	2.373	0.012	1	2
NH2CONH2	Urea	rNH	0.998		1.010	0.013	4	8
PF5	Phosphorus pentafluoride	rFP	1.577		1.590	0.013	1	5
GeO	Germanium monoxide	rOGe	1.625		1.638	0.013	1	2
HF+	hydrogen fluoride cation	rHF	1.014		1.027	0.013	1	2
C2H6O2S	Dimethyl sulfone	rCS	1.777	±0.006	1.790	0.013	1	4
SiH3+	Silyl cation	rSiH	1.460	±0.010	1.474	0.014	1	2
AlNC	Aluminum isocyanide	rAlN	1.855	±0.005	1.869	0.014	1	2
BeH	beryllium monohydride	rBeH	1.343		1.357	0.014	1	2
SiH3Cl	chlorosilane	rSiCl	2.051		2.065	0.014	1	2
AlC	Aluminum carbide	rC=Al	1.955		1.969	0.014	1	2
GeF	Germanium monofluoride	rFGe	1.745		1.760	0.014	1	2
HS-	mercapto anion	rSH	1.343		1.358	0.015	1	2
SiH3F	monofluorosilane	rSiF	1.595		1.610	0.015	1	2
HBr+	hydrogen bromide cation	rHBr	1.448		1.464	0.015	1	2
GeH3F	monofluorogermane	rGeF	1.731	±0.000	1.746	0.015	1	2
PO	Phosphorus monoxide	rP=O	1.476		1.492	0.016	1	2
NH3BF3	Amminetrifluoroboron	rBN	1.673		1.689	0.016	1	2
SiH+	silicon monohydride cation	rSiH	1.504		1.520	0.016	1	2
ClF	Chlorine monofluoride	rFCl	1.628	±0.000	1.644	0.016	1	2
OH-	hydroxide anion	rOH	0.964		0.980	0.016	1	2
SF	Monosulfur monofluoride	rSF	1.599		1.616	0.016	1	2
BrCl	Bromine monochloride	rClBr	2.136	±0.000	2.153	0.016	1	2
CH3CH2OH	Ethanol	rCH	1.086		1.103	0.017	2	8
SiF	silicon monofluoride	rSiF	1.604		1.621	0.017	1	2
HBr	hydrogen bromide	rHBr	1.414	±0.000	1.432	0.018	1	2
BH	Boron monohydride	rBH	1.232		1.250	0.018	1	2
S2	Sulfur diatomic	rS=S	1.889		1.907	0.018	1	2
SiH	Silylidyne	rSiH	1.520		1.538	0.018	1	2
SSO	Disulfur monoxide	rS=S	1.884		1.902	0.018	2	3
SiH2Cl2	dichlorosilane	rSiCl	2.033	±0.003	2.051	0.018	1	4
SOF4	Sulfur tetrafluoride oxide	rFS	1.596	±0.003	1.614	0.018	1	3
SiH2F2	difluorosilane	rSiH	1.462		1.480	0.018	1	4
Cl2+	chlorine diatomic cation	rClCl	1.892		1.910	0.019	1	2
C3O2	Carbon suboxide	rC=O	1.146		1.166	0.020	2	4
SSO	Disulfur monoxide	rS=O	1.456		1.476	0.020	1	2
H2Se	Hydrogen selenide	rSeH	1.460		1.481	0.021	1	2
C3H5	Allyl radical	rCH	1.069		1.090	0.021	1	2
SiF2	Silicon difluoride	rFSi	1.590	±0.000	1.611	0.021	1	2
SCl	sulfur monochloride	rSCl	1.975		1.997	0.021	1	2
C2H	Ethynyl radical	rCH	1.047		1.068	0.022	1	3
Cl2	Chlorine diatomic	rClCl	1.988		2.010	0.022	1	2
OPCl	Phosphorus oxychloride	rPCl	2.059	±0.004	2.081	0.022	1	3
PF2	Phosphorus difluoride	rPF	1.579		1.601	0.022	1	2
C5H8O	Cyclopentanone	rCC	1.504		1.526	0.022	2	3
SCl2	Sulfur dichloride	rSCl	2.013	±0.001	2.035	0.022	1	2
GeH3F	monofluorogermane	rGeH	1.515	±0.000	1.537	0.022	1	3
BrO	Bromine monoxide	rOBr	1.718		1.740	0.023	1	2
SiCl	Clorosilylidyne	rSiCl	2.061	±0.000	2.085	0.023	1	2
HSiCl	Chlorosilylene	rSiCl	2.067	±0.003	2.091	0.024	1	2
GeCl	Germanium monochloride	rClGe	2.164	±0.000	2.188	0.024	1	2
SO	Sulfur monoxide	rS=O	1.481		1.506	0.024	1	2
HClO4	perchloric acid	rO=Cl	1.414	±0.001	1.439	0.025	1	2
GeH	germylidene	rGeH	1.588		1.613	0.025	1	2
C3O2	Carbon suboxide	rC=C	1.251		1.277	0.026	1	2
KrH+	Protonated Krypton	rHKr	1.421	±0.000	1.447	0.026	1	2
AsH3	Arsine	rAsH	1.511	±0.000	1.537	0.026	1	2
NCl	nitrogen monochloride	rNCl	1.611	±0.000	1.637	0.026	1	2
F2SO	Thionyl Fluoride	rFS	1.585	±0.000	1.612	0.026	1	3
F2SO	Thionyl Fluoride	rO=S	1.413	±0.000	1.439	0.026	1	2
B2	Boron diatomic	rBB	1.590		1.617	0.027	1	2
MgH	magnesium monohydride	rMgH	1.730		1.757	0.027	1	2
AlCl	Aluminum monochloride	rAlCl	2.130	±0.000	2.158	0.027	1	2
PF5	Phosphorus pentafluoride	rPF	1.534		1.562	0.028	1	2
LiH	Lithium Hydride	rLiH	1.595	±0.000	1.625	0.030	1	2
GeF+	Germanium monofluoride cation	rFGe	1.665	±0.000	1.696	0.031	1	2
C2H6O2S	Dimethyl sulfone	rS=O	1.431	±0.004	1.462	0.031	1	2
HClO4	perchloric acid	rOCl	1.641	±0.002	1.672	0.031	1	3
NaLi	lithium sodium	rLiNa	2.889		2.920	0.031	1	2
LiCl	lithium chloride	rLiCl	2.021	±0.000	2.056	0.035	1	2
SF4	Sulfur tetrafluoride	rSF	1.545	±0.003	1.581	0.036	1	4
KH	Potassium hydride	rKH	2.243	±0.001	2.281	0.039	1	2
SOF4	Sulfur tetrafluoride oxide	rFS	1.539	±0.003	1.581	0.042	1	5
ClOF3	Chlorine trifluoride oxide	rFCl	1.603	±0.004	1.646	0.043	1	3
HClO4	perchloric acid	rO=Cl	1.404	±0.001	1.449	0.045	1	4
CFCl	chlorofluoromethylene	rCCl	1.714		1.766	0.052	1	3
C4H8O2	Ethyl acetate	rCO	1.448		1.510	0.062	5	6
Li2	Lithium diatomic	rLiLi	2.673		2.753	0.080	1	2
CaBr	Calcium monobromide	rCaBr	2.594	±0.000	2.684	0.090	1	2
CaC	Calcium monocarbide	rC#Ca	2.302		2.408	0.106	1	2
CaH	Calcium monohydride	rCaH	2.003	±0.000	2.118	0.115	1	2
He2+	helium diatomic cation	rHeHe	1.081	±0.001	1.209	0.128	1	2
CaO	Calcium monoxide	rOCa	1.822		2.019	0.197	1	2
Al2Cl6	Aluminum, di-μ-chlorotetrachlorodi-	rAlCl	2.040	±0.040	2.276	0.236	1	3
C4H10O	Methyl propyl ether	rCH	1.099		1.399	0.300	1	2

311 molecules.