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 M06-2X/6-311G*

Species	Name	Bond type	Bond Length (Å)
			Experimental	unc.	Calculated	Difference	atom1	atom2
C4H10O	Methyl propyl ether	rCC	1.530		1.093	-0.437	5	13
Na2	Sodium diatomic	rNaNa	3.079		2.955	-0.124	1	2
ScH	Scandium monohydride	rScH	1.775	±0.000	1.715	-0.061	1	2
NaLi	lithium sodium	rLiNa	2.889		2.834	-0.055	1	2
FNO2	Nitryl fluoride	rNF	1.467	±0.015	1.415	-0.052	1	2
C5H6	Propellane	rCC	1.596	±0.005	1.552	-0.044	2	5
F2	Fluorine diatomic	rFF	1.412		1.371	-0.041	1	2
C5H8O	Methyl cyclopropyl ketone	rCH	1.126		1.088	-0.038	3	7
FO	Oxygen monofluoride	rFO	1.354		1.328	-0.026	1	2
C2H2O2	Ethanedial	rCH	1.132		1.106	-0.026	1	3
HNO3	Nitric acid	rNO	1.406		1.381	-0.025	1	2
HO2	Hydroperoxy radical	rOO	1.331		1.306	-0.025	1	2
O2+	diatomic oxygen cation	rOO	1.116		1.092	-0.024	1	2
C3F6	hexafluoropropene	rCF	1.329	±0.003	1.305	-0.024	1	4
NaF	sodium fluoride	rNaF	1.926	±0.000	1.904	-0.022	1	2
C9H8	Indene	rCC	1.415	±0.170	1.394	-0.021	1	2
CH3CH2CH2CH3	Butane	rCH	1.117		1.096	-0.021	1	5
CH3OCl	methyl hypochlorite	rCH	1.111	±0.018	1.090	-0.021	3	4
O2	Oxygen diatomic	rO=O	1.208		1.189	-0.019	1	2
LiOH	lithium hydroxide	rOH	0.969		0.950	-0.019	1	3
BeO	beryllium oxide	rBe=O	1.331		1.312	-0.019	1	2
C4H8O2	Ethyl acetate	rCH	1.105		1.087	-0.018	1	7
CN	Cyano radical	rC#N	1.172		1.155	-0.017	1	2
C2H	Ethynyl radical	rC#C	1.217		1.200	-0.017	1	2
BN	boron nitride	rB=N	1.325		1.308	-0.017	1	2
P2	Phosphorus diatomic	rP#P	1.893		1.877	-0.016	1	2
C5H6	Propellane	rCC	1.525	±0.002	1.509	-0.016	1	2
SiH2Cl2	dichlorosilane	rSiH	1.480	±0.015	1.465	-0.015	1	2
NO	Nitric oxide	rN=O	1.154	±0.000	1.138	-0.015	1	2
B2H6	Diborane	rBH	1.200		1.185	-0.015	1	5
OCSe	Carbonyl selenide	rC=O	1.159		1.144	-0.015	1	2
PN	Phosphorus mononitride	rP#N	1.491		1.477	-0.014	1	2
C5H8	Ethenylcyclopropane	rCH	1.099		1.085	-0.014	1	6
NO+	nitric oxide cation	rN=O	1.066		1.052	-0.014	1	2
C4H6	Bicyclo[1.1.0]butane	rCC	1.497		1.483	-0.014	1	2
C10H8	Azulene	rC:C	1.414		1.400	-0.014	7	9
SiC	silicon monocarbide	rCSi	1.722		1.708	-0.014	1	2
LiOH	lithium hydroxide	rLiO	1.582		1.568	-0.013	1	2
LiNH2	lithium amide	rLiN	1.736	±0.003	1.723	-0.013	1	2
CO+	carbon monoxide cation	rC=O	1.115	±0.000	1.103	-0.013	1	2
CH3CH2CHO	Propanal	rCH	1.103		1.091	-0.012	1	6
CH3OC2H5	Ethane, methoxy-	rCO	1.415	±0.005	1.403	-0.012	1	2
HS+	sulfur monohydride cation	rSH	1.374		1.363	-0.011	1	2
HCCl	Chloromethylene	rCH	1.119	±0.036	1.108	-0.010	1	3
N3	azide radical	rNN	1.181		1.171	-0.010	1	2
C3H3NO	Oxazole	rCO	1.357	±0.003	1.347	-0.010	1	2
LiO	lithium oxide	rLiO	1.688		1.678	-0.010	1	2
SiP	Silicon monophosphide	rSiP	2.078	±0.002	2.067	-0.010	1	2
H2CSe	Selenoformaldehyde	rC=Se	1.753		1.743	-0.010	1	2
ICN	Cyanogen iodide	rC#N	1.160	±0.000	1.150	-0.010	2	3
CH3NH2	methyl amine	rCN	1.471	±0.003	1.462	-0.009	1	2
C8H8	cubane	rCH	1.097		1.088	-0.009	1	9
NSe	Nitrogen monoselenide	rN=Se	1.652		1.643	-0.009	1	2
HSiCl	Chlorosilylene	rSiH	1.525	±0.005	1.516	-0.009	1	3
C2H2+	acetylene cation	rC=C	1.253	±0.001	1.244	-0.009	1	2
C3H3NO	Oxazole	rCO	1.370	±0.002	1.361	-0.009	1	5
CaO	Calcium monoxide	rOCa	1.822		1.813	-0.009	1	2
CH3OCH3	Dimethyl ether	rCO	1.411	±0.001	1.403	-0.008	1	2
NaH	sodium hydride	rNaH	1.887	±0.000	1.878	-0.008	1	2
LiF	lithium fluoride	rLiF	1.564	±0.000	1.556	-0.008	1	2
CN-	cyanide anion	rC#N	1.177	±0.004	1.169	-0.008	1	2
BO	boron monoxide	rB=O	1.205		1.196	-0.008	1	2
CH2NH	Methanimine	rCH	1.103		1.095	-0.008	1	3
CH3CH2CHO	Propanal	rCH	1.105		1.097	-0.008	2	8
H2Cl+	dihydrogen monochloride cation	rHCl	1.321	±0.000	1.313	-0.008	1	2
CF	Fluoromethylidyne	rCF	1.276		1.268	-0.008	1	2
N2	Nitrogen diatomic	rN#N	1.098		1.090	-0.008	1	2
FNO2	Nitryl fluoride	rN=O	1.180	±0.005	1.173	-0.007	1	3
CF3COOH	trifluoroacetic acid	rCC	1.546	±0.005	1.539	-0.007	1	2
HClO4	perchloric acid	rOH	0.980		0.973	-0.007	3	6
H2CS	Thioformaldehyde	rC=S	1.611		1.604	-0.007	1	2
CH2CO	Ketene	rC=O	1.162		1.155	-0.007	2	3
HOCl	hypochlorous acid	rOH	0.973	±0.002	0.966	-0.007	1	2
CH3CH2OH	Ethanol	rCH	1.098		1.091	-0.007	1	6
SeO2	Selenium dioxide	rSeO	1.607	±0.001	1.600	-0.007	1	2
CO	Carbon monoxide	rC#O	1.128	±0.000	1.122	-0.007	1	2
HF+	hydrogen fluoride cation	rHF	1.014		1.008	-0.006	1	2
HNCNH	diiminomethane	rC=N	1.224	±0.001	1.218	-0.006	1	2
CH2	Methylene	rCH	1.085		1.079	-0.006	1	2
HeH+	Helium hydride cation	rHHe	0.790		0.784	-0.006	1	2
C3F6	hexafluoropropene	rC=C	1.329	±0.003	1.323	-0.006	1	2
C2H2	Acetylene	rC#C	1.203		1.197	-0.006	1	2
As4	Arsenic tetramer	rAsAs	2.435		2.429	-0.006	1	2
CH2PH	Phosphaethene	rCH	1.090	±0.015	1.084	-0.006	1	3
CH3CH2CHO	Propanal	rCH	1.096		1.091	-0.005	1	5
CH3CH2CHO	Propanal	rCH	1.115		1.110	-0.005	3	10
C10H8	Azulene	rC:C	1.398		1.393	-0.005	1	3
PS	phosphorus sulfide	rP=S	1.900		1.895	-0.005	1	2
SO+	sulfur monoxide cation	rO=S	1.424		1.419	-0.005	1	2
SCSe	Carbon sulfide selenide	rC=S	1.553	±0.002	1.548	-0.005	1	2
CH2CHCH2CH3	1-Butene	rCC	1.536		1.531	-0.005	1	2
CH3CCH	propyne	rCH	1.096		1.091	-0.005	1	5
C3H6O	2-Propen-1-ol	rCH	1.091	±0.010	1.086	-0.005	3	9
NH4+	ammonium cation	rHN	1.029	±0.000	1.024	-0.005	1	2
C3H6O	2-Propen-1-ol	rCH	1.092	±0.010	1.087	-0.005	2	7
CSe	Carbon monoselenide	rC=Se	1.676	±0.000	1.672	-0.005	1	2
C10H8	Azulene	rC:C	1.405	±0.001	1.400	-0.005	2	9
CH2PH	Phosphaethene	rCH	1.090	±0.015	1.086	-0.004	1	4
B2H6	Diborane	rBH	1.320		1.316	-0.004	1	3
CH3NH2	methyl amine	rNH	1.018	±0.001	1.014	-0.004	2	6
CH3CHO	Acetaldehyde	rCH	1.114		1.110	-0.004	1	4
C4H8O2	Ethyl acetate	rC=O	1.203		1.199	-0.004	2	4
H2	Hydrogen diatomic	rHH	0.741		0.738	-0.004	1	2
SiH3Cl	chlorosilane	rSiH	1.475		1.471	-0.004	1	3
C4H8O2	Ethyl acetate	rCC	1.515		1.511	-0.004	5	6
H2CSe	Selenoformaldehyde	rHC	1.090		1.087	-0.004	1	3
LiH	Lithium Hydride	rLiH	1.595	±0.000	1.591	-0.004	1	2
CH3NO	nitrosomethane	rCH	1.094		1.090	-0.004	1	4
CH3CH2CH2CH3	Butane	rCC	1.531		1.527	-0.004	1	2
OPCl	Phosphorus oxychloride	rP=O	1.462	±0.011	1.459	-0.003	1	2
SiH3F	monofluorosilane	rSiH	1.476		1.473	-0.003	1	3
CF3COOH	trifluoroacetic acid	rC=O	1.192	±0.003	1.189	-0.003	2	4
CH2CO	Ketene	rCH	1.083		1.079	-0.003	1	4
C4H8O2	Ethyl acetate	rCC	1.508		1.505	-0.003	1	2
CH3CHS	Thioacetaldehyde	rCH	1.098		1.095	-0.003	2	6
CHF3	Methane, trifluoro-	rCH	1.091	±0.014	1.088	-0.003	1	2
CH3CH2CHO	Propanal	rCC	1.523		1.520	-0.003	1	2
C3H6O	2-Propen-1-ol	rCH	1.102	±0.020	1.100	-0.002	1	6
NS	Mononitrogen monosulfide	rNS	1.497	±0.000	1.495	-0.002	1	2
CH3CHFCH3	2-Fluoropropane	rCH	1.093	±0.006	1.091	-0.002	4	8
SiH+	silicon monohydride cation	rSiH	1.504		1.502	-0.002	1	2
SiH4	Silane	rSiH	1.480	±0.000	1.478	-0.002	1	2
BF	Boron monofluoride	rBF	1.267	±0.000	1.265	-0.002	1	2
SiO	Silicon monoxide	rSiO	1.510	±0.000	1.508	-0.002	1	2
C3H8	Propane	rCH	1.096		1.094	-0.002	1	4
GeO	Germanium monoxide	rOGe	1.625		1.623	-0.002	1	2
CH3CHFCH3	2-Fluoropropane	rCH	1.094	±0.005	1.092	-0.002	4	10
CH3CHS	Thioacetaldehyde	rCH	1.090		1.088	-0.002	2	5
CH3CH2CHO	Propanal	rCC	1.509		1.508	-0.001	2	3
CH3CHClCH3	Propane, 2-chloro-	rCH	1.091		1.090	-0.001	2	5
TiCl	Titanium Monochloride	rClTi	2.265	±0.000	2.263	-0.001	1	2
CH2Cl2	Methylene chloride	rCH	1.085	±0.002	1.084	-0.001	1	2
C4H8	cyclobutane	rCH	1.093		1.092	-0.001	1	5
CH3OC2H5	Ethane, methoxy-	rCH	1.092	±0.007	1.091	-0.001	4	11
BH3	boron trihydride	rBH	1.190		1.189	-0.001	1	2
C2H2O2	Ethanedial	rCC	1.526		1.525	-0.001	1	2
C4H8O2	Ethyl acetate	rCO	1.345		1.344	-0.001	2	3
CH3OC2H5	Ethane, methoxy-	rCH	1.099	±0.007	1.098	-0.001	1	6
PH	phosphorus monohydride	rPH	1.422		1.422	-0.001	1	2
C3H6	Cyclopropane	rCH	1.083		1.082	-0.001	1	4
CH3OCH3	Dimethyl ether	rCH	1.099	±0.001	1.098	-0.001	2	6
SiS	silicon monosulfide	rSiS	1.929	±0.000	1.929	-0.000	1	2
LiCl	lithium chloride	rLiCl	2.021	±0.000	2.020	0.000	1	2
C4H8	cyclobutane	rCH	1.091		1.091	0.000	1	6
CSe2	Carbon diselenide	rC=Se	1.692	±0.000	1.692	0.000	1	2
C2H2ClF	1-chloro-1-fluoroethylene	rCH	1.082	±0.001	1.082	0.000	2	5
CH3NO	nitrosomethane	rCH	1.092		1.092	0.000	1	5
AsH	Arsenic monohydride	rAsH	1.535	±0.001	1.535	0.000	1	2
CH	Methylidyne	rCH	1.120		1.120	0.000	1	2
CH3OC2H5	Ethane, methoxy-	rCH	1.100	±0.003	1.101	0.001	3	8
C5H8O	Methyl cyclopropyl ketone	rCC	1.510		1.511	0.001	2	3
CBr4	Carbon tetrabromide	rCBr	1.942	±0.002	1.943	0.001	1	2
SiH	Silylidyne	rSiH	1.520		1.521	0.001	1	2
C2H5I	Ethyl iodide	rHC	1.093		1.094	0.001	2	6
C5H8	Ethenylcyclopropane	rCC	1.475		1.476	0.001	1	2
C3H6	Cyclopropane	rCC	1.501		1.502	0.001	1	2
BH	Boron monohydride	rBH	1.232		1.233	0.001	1	2
CH2F2	Methane, difluoro-	rCF	1.351	±0.001	1.352	0.001	1	4
C3H4	cyclopropene	rCH	1.088		1.089	0.001	1	6
NO-	nitric oxide anion	rN=O	1.258	±0.010	1.259	0.001	1	2
C10H8	Azulene	rCH	1.084		1.085	0.001	4	14
CH3CHClCH3	Propane, 2-chloro-	rCH	1.092		1.093	0.001	3	6
CH3OC2H5	Ethane, methoxy-	rCO	1.407	±0.004	1.409	0.002	2	3
CH2CHF	Ethene, fluoro-	rCH	1.082		1.084	0.002	1	4
BeH2	beryllium dihydride	rBeH	1.326	±0.000	1.328	0.002	1	2
C3H6O	2-Propen-1-ol	rCH	1.096	±0.030	1.098	0.002	1	5
CH4	Methane	rCH	1.087	±0.001	1.089	0.002	1	2
HO2	Hydroperoxy radical	rOH	0.971		0.973	0.002	1	3
PO	Phosphorus monoxide	rP=O	1.476		1.478	0.002	1	2
H2O	Water	rOH	0.958	±0.000	0.960	0.002	1	2
SCSe	Carbon sulfide selenide	rC=Se	1.695	±0.002	1.697	0.002	1	3
C10H8	Azulene	rCH	1.080		1.081	0.002	9	17
C2H2	Acetylene	rCH	1.063		1.065	0.002	1	3
C3H3NO	Oxazole	rCH	1.073	±0.001	1.076	0.002	5	8
C3H3NO	Oxazole	rCH	1.075	±0.001	1.077	0.002	4	7
SiH2F2	difluorosilane	rSiH	1.462		1.464	0.002	1	4
CH3CHO	Acetaldehyde	rCH	1.086		1.089	0.003	2	5
SiH3+	Silyl cation	rSiH	1.460	±0.010	1.463	0.003	1	2
CH3OC2H5	Ethane, methoxy-	rCH	1.089	±0.008	1.092	0.003	4	10
NH2SH	Thiohydroxylamine	rSH	1.344	±0.029	1.347	0.003	2	3
CH3Br	methyl bromide	rCH	1.082	±0.001	1.085	0.003	1	3
HSe	Selenium monohydride	rSeH	1.475	±0.010	1.478	0.003	1	2
C3H3NO	Oxazole	rCH	1.075	±0.001	1.078	0.003	2	6
CH3CHFCH3	2-Fluoropropane	rCH	1.092		1.095	0.003	1	3
CHF3	Methane, trifluoro-	rCF	1.328	±0.003	1.331	0.003	1	3
CH3OC2H5	Ethane, methoxy-	rCH	1.086	±0.010	1.089	0.003	1	5
OH	Hydroxyl radical	rOH	0.970		0.973	0.003	1	2
CH3CHS	Thioacetaldehyde	rCH	1.089		1.092	0.003	1	4
SeO	Selenium monoxide	rSeO	1.639	±0.001	1.643	0.003	1	2
CHONH2	formamide	rNH	1.001		1.004	0.003	3	6
HF	Hydrogen fluoride	rHF	0.917	±0.000	0.920	0.004	1	2
C2H2+	acetylene cation	rCH	1.077	±0.005	1.080	0.004	1	3
CH3CH2OH	Ethanol	rCH	1.088		1.092	0.004	1	5
CH3CSNH2	Ethanethioamide	rC=S	1.647	±0.002	1.651	0.004	1	2
CH3OCH3	Dimethyl ether	rCH	1.085	±0.001	1.089	0.004	2	4
CH3CHFCH3	2-Fluoropropane	rCH	1.088	±0.006	1.092	0.004	4	6
CH3CCH	propyne	rCH	1.060		1.065	0.005	3	4
BF3	Borane, trifluoro-	rBF	1.307		1.312	0.005	1	2
C3H4	cyclopropene	rCH	1.072		1.077	0.005	2	4
HOCl	hypochlorous acid	rClO	1.697	±0.001	1.702	0.005	1	3
HOBr	Hypobromous acid	rOH	0.961		0.966	0.005	1	2
KH	Potassium hydride	rKH	2.243	±0.001	2.247	0.005	1	2
Se2	Selenium diatomic	rSe=Se	2.166	±0.001	2.171	0.005	1	2
SSO	Disulfur monoxide	rS=S	1.884		1.889	0.005	2	3
C10H8	Azulene	rCH	1.081		1.087	0.005	1	11
C2	Carbon diatomic	rC=C	1.243		1.248	0.005	1	2
C10H8	naphthalene	rC:C	1.410		1.415	0.005	2	3
CH2CHF	Ethene, fluoro-	rCH	1.077		1.082	0.005	2	5
CH3NH2	methyl amine	rCH	1.093	±0.000	1.098	0.006	1	3
C10H8	Azulene	rCH	1.083		1.088	0.006	5	15
HOBr	Hypobromous acid	rBrO	1.834		1.840	0.006	2	3
SSO	Disulfur monoxide	rS=O	1.456		1.462	0.006	1	2
C3H6O	2-Propen-1-ol	rCH	1.078	±0.010	1.084	0.006	3	8
C3O2	Carbon suboxide	rC=O	1.146		1.152	0.006	2	4
ClO	Monochlorine monoxide	rClO	1.596	±0.001	1.602	0.006	1	2
CH2Br2	dibromomethane	rCBr	1.925	±0.002	1.931	0.006	1	4
C2H3	vinyl	rCH	1.085		1.091	0.006	2	4
CH3CH2O	Ethoxy radical	rCH	1.085		1.091	0.006	1	5
GeS	Germanium monosulfide	rS=Ge	2.012	±0.000	2.018	0.006	1	2
CH3CH2O	Ethoxy radical	rCH	1.086		1.092	0.006	1	4
CHONH2	formamide	rNH	1.001		1.007	0.006	3	5
CH2F2	Methane, difluoro-	rCH	1.084	±0.003	1.090	0.006	1	2
CH3OCl	methyl hypochlorite	rCH	1.086	±0.018	1.093	0.007	3	5
BeH	beryllium monohydride	rBeH	1.343		1.349	0.007	1	2
ArH+	Argon hydride cation	rArH	1.292	±0.000	1.299	0.007	1	2
HS	Mercapto radical	rSH	1.341		1.348	0.007	1	2
LiBr	Lithium Bromide	rLiBr	2.170	±0.000	2.177	0.007	1	2
CH2Cl2	Methylene chloride	rCCl	1.767	±0.002	1.774	0.007	1	4
HCl+	hydrogen chloride cation	rHCl	1.315		1.322	0.008	1	2
OCSe	Carbonyl selenide	rC=Se	1.709		1.717	0.008	1	3
LiI	Lithium Iodide	rLiI	2.392	±0.000	2.400	0.008	1	2
NH3BF3	Amminetrifluoroboron	rBN	1.673		1.681	0.008	1	2
CH2CHCH2CH3	1-Butene	rCC	1.493		1.501	0.008	2	3
CH3Br	methyl bromide	rCBr	1.934	±0.000	1.942	0.008	1	2
C10H8	Azulene	rC:C	1.484		1.493	0.009	7	8
NaCl	Sodium Chloride	rNaCl	2.361	±0.000	2.370	0.009	1	2
PF5	Phosphorus pentafluoride	rFP	1.577		1.586	0.009	1	5
HCCl	Chloromethylene	rCCl	1.696	±0.003	1.706	0.010	1	2
C10H8	Azulene	rC:C	1.377		1.388	0.010	5	7
CrH	Chromium hydride	rHCr	1.655	±0.001	1.665	0.010	1	2
NH2CONH2	Urea	rNH	0.998		1.008	0.011	4	8
HBr+	hydrogen bromide cation	rHBr	1.448		1.459	0.011	1	2
C2H6O2S	Dimethyl sulfone	rCS	1.777	±0.006	1.788	0.011	1	4
AlC	Aluminum carbide	rC=Al	1.955		1.966	0.011	1	2
CH3CH2OH	Ethanol	rCH	1.086		1.098	0.012	2	8
F2SO	Thionyl Fluoride	rO=S	1.413	±0.000	1.425	0.012	1	2
HCl	Hydrogen chloride	rHCl	1.275	±0.000	1.287	0.012	1	2
S2	Sulfur diatomic	rS=S	1.889		1.901	0.012	1	2
HClO4	perchloric acid	rO=Cl	1.414	±0.001	1.426	0.012	1	2
HS-	mercapto anion	rSH	1.343		1.356	0.013	1	2
SeCl2	Selenium Dichloride	rClSe	2.157	±0.003	2.170	0.013	1	2
OH-	hydroxide anion	rOH	0.964		0.977	0.013	1	2
ICN	Cyanogen iodide	rCI	1.992	±0.000	2.006	0.014	1	2
H2Se	Hydrogen selenide	rSeH	1.460		1.474	0.014	1	2
AsH3	Arsine	rAsH	1.511	±0.000	1.525	0.014	1	2
SO	Sulfur monoxide	rS=O	1.481		1.495	0.014	1	2
Br2	Bromine diatomic	rBrBr	2.281		2.296	0.015	1	2
GeH	germylidene	rGeH	1.588		1.603	0.015	1	2
SiH2Cl2	dichlorosilane	rSiCl	2.033	±0.003	2.048	0.015	1	4
AlNC	Aluminum isocyanide	rAlN	1.855	±0.005	1.870	0.015	1	2
HBr	hydrogen bromide	rHBr	1.414	±0.000	1.430	0.016	1	2
SiBr+	Silicon monobromide cation	rSiBr	2.095	±0.000	2.111	0.016	1	2
CH3CH2O	Ethoxy radical	rCH	1.088		1.104	0.016	2	7
SiH3Cl	chlorosilane	rSiCl	2.051		2.067	0.016	1	2
HClO4	perchloric acid	rOCl	1.641	±0.002	1.657	0.016	1	3
ClOF3	Chlorine trifluoride oxide	rFCl	1.713	±0.003	1.729	0.016	1	4
GaF	Gallium monofluoride	rFGa	1.774	±0.000	1.791	0.016	1	2
CH2I2	Diiodomethane	rCH	1.066	±0.015	1.082	0.016	1	4
CaC	Calcium monocarbide	rC#Ca	2.302		2.318	0.016	1	2
SF	Monosulfur monofluoride	rSF	1.599		1.617	0.017	1	2
MgH	magnesium monohydride	rMgH	1.730		1.747	0.017	1	2
Cl2+	chlorine diatomic cation	rClCl	1.892		1.909	0.018	1	2
SiH3F	monofluorosilane	rSiF	1.595		1.613	0.018	1	2
HI+	Hydrogen iodide cation	rHI	1.632	±0.000	1.650	0.018	1	2
C3H5	Allyl radical	rCH	1.069		1.087	0.018	1	2
GeBr4	Germanium tetrabromide	rGeBr	2.272	±0.001	2.291	0.019	1	2
SiF	silicon monofluoride	rSiF	1.604		1.624	0.020	1	2
C2H	Ethynyl radical	rCH	1.047		1.066	0.020	1	3
SF4	Sulfur tetrafluoride	rSF	1.646	±0.003	1.666	0.020	1	2
Li2	Lithium diatomic	rLiLi	2.673		2.693	0.020	1	2
PF5	Phosphorus pentafluoride	rPF	1.534		1.554	0.020	1	2
CaH	Calcium monohydride	rCaH	2.003	±0.000	2.023	0.021	1	2
PF2	Phosphorus difluoride	rPF	1.579		1.600	0.021	1	2
GeH3F	monofluorogermane	rGeF	1.731	±0.000	1.752	0.021	1	2
SOF4	Sulfur tetrafluoride oxide	rFS	1.596	±0.003	1.617	0.021	1	3
GeF	Germanium monofluoride	rFGe	1.745		1.767	0.022	1	2
BrF	Bromine monofluoride	rFBr	1.759	±0.000	1.781	0.022	1	2
ClF	Chlorine monofluoride	rFCl	1.628	±0.000	1.650	0.022	1	2
C2H6O2S	Dimethyl sulfone	rS=O	1.431	±0.004	1.453	0.022	1	2
C3O2	Carbon suboxide	rC=C	1.251		1.274	0.023	1	2
SiF2	Silicon difluoride	rFSi	1.590	±0.000	1.613	0.023	1	2
AlF	Aluminum monofluoride	rAlF	1.654	±0.000	1.678	0.024	1	2
SiCl	Clorosilylidyne	rSiCl	2.061	±0.000	2.085	0.024	1	2
IBr	Iodine monobromide	rBrI	2.469	±0.000	2.493	0.024	1	2
BrCl	Bromine monochloride	rClBr	2.136	±0.000	2.160	0.024	1	2
C5H8O	Cyclopentanone	rCC	1.504		1.528	0.024	2	3
GeH3F	monofluorogermane	rGeH	1.515	±0.000	1.540	0.025	1	3
KrH+	Protonated Krypton	rHKr	1.421	±0.000	1.447	0.025	1	2
SF4	Sulfur tetrafluoride	rSF	1.545	±0.003	1.571	0.026	1	4
GeF+	Germanium monofluoride cation	rFGe	1.665	±0.000	1.691	0.026	1	2
F2SO	Thionyl Fluoride	rFS	1.585	±0.000	1.612	0.027	1	3
HSSSH	trisulfane	rSS	2.054	±0.000	2.081	0.027	1	2
AlCl	Aluminum monochloride	rAlCl	2.130	±0.000	2.157	0.027	1	2
AsF	Arsenic monofluoride	rFAs	1.736	±0.001	1.763	0.027	1	2
BrO	Bromine monoxide	rOBr	1.718		1.745	0.027	1	2
B2	Boron diatomic	rBB	1.590		1.619	0.029	1	2
HSiCl	Chlorosilylene	rSiCl	2.067	±0.003	2.096	0.029	1	2
SOF4	Sulfur tetrafluoride oxide	rFS	1.539	±0.003	1.568	0.029	1	5
CaBr	Calcium monobromide	rCaBr	2.594	±0.000	2.625	0.032	1	2
OPCl	Phosphorus oxychloride	rPCl	2.059	±0.004	2.091	0.032	1	3
HClO4	perchloric acid	rO=Cl	1.404	±0.001	1.438	0.034	1	4
SCl	sulfur monochloride	rSCl	1.975		2.009	0.034	1	2
SCl2	Sulfur dichloride	rSCl	2.013	±0.001	2.047	0.034	1	2
AlBr	Aluminum monobromide	rAlBr	2.295		2.330	0.035	1	2
ICl	Iodine monochloride	rClI	2.321	±0.000	2.357	0.036	1	2
Cl2	Chlorine diatomic	rClCl	1.988		2.024	0.036	1	2
ClOF3	Chlorine trifluoride oxide	rFCl	1.603	±0.004	1.640	0.037	1	3
NCl	nitrogen monochloride	rNCl	1.611	±0.000	1.650	0.039	1	2
GeCl	Germanium monochloride	rClGe	2.164	±0.000	2.204	0.040	1	2
GaAs	Gallium arsenide	rGa#As	2.530	±0.020	2.572	0.042	1	2
IF	Iodine monofluoride	rFI	1.910		1.954	0.045	1	2
CFCl	chlorofluoromethylene	rCCl	1.714		1.759	0.045	1	3
GaBr	Gallium monobromide	rGaBr	2.352	±0.000	2.400	0.048	1	2
C4H8O2	Ethyl acetate	rCO	1.448		1.511	0.063	5	6
He2+	helium diatomic cation	rHeHe	1.081	±0.001	1.164	0.083	1	2
Al2Cl6	Aluminum, di-μ-chlorotetrachlorodi-	rAlCl	2.040	±0.040	2.263	0.223	1	3
C4H10O	Methyl propyl ether	rCH	1.099		1.403	0.304	1	2

327 molecules.