National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 17bSeptember 2015
NIST Standard Reference Database 101
IIExperimental data
IIICalculated data
IVData comparisons
VCost comparisons
VIInput and output files
VIITutorials and Units
VIIILinks to other sites
XOlder CCCBDB versions
XIII Vibrations
XIVReaction data
XVEntropy data
XVIBibliographic data
XVIIIon data
XVIIIBad calculations
XIXIndex of properties
XXH-bond dimers

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Bond Length differences between CCSD(T) (frozen core) and CCSD(T)=FULL (all electrons correlated)

So far we have calculation for only a few small molceules.
Species name
H2+ Hydrogen cation
H2 Hydrogen diatomic
H2- hydrogen diatomic anion
HeH+ Helium hydride cation
He2+ helium dimer cation
LiH Lithium Hydride
LiH+ lithium hydride cation
Li2 Lithium diatomic
Li2- lithium dimer anion
LiH- lithium hydride anion
BeH+ beryllium monohydride cation
LiBe Lithium Beryllium
BeH- berylium monohydride anion
BeH beryllium monohydride
Be2- Beryllium dimer anion
Be2 Beryllium diatomic
Be2+ Beryllium diatomic cation
BH- boron monohydride anion
BH Boron monohydride
LiB Lithium boride
BH+ boron monohydride cation
BeB Beryllium monoboride
B2 Boron diatomic
B2+ Boron diatomic cation
B2- Boron diatomic anion
CH Methylidyne
LiC Lithium Carbide
CH- methylidyne anion
CH+ Methylidyne cation
BeC beryllium carbide triplet
BC boron monocarbide
C2- carbon diatomic anion
C2 Carbon diatomic
C2+ carbon diatomic cation
NH- Imidogen anion
NH+ imidogen cation
LiN Lithium Nitride
LiN+ Lithium Nitride cation
BeN- Beryllium mononitride anion
BeN Beryllium mononitride
BeN+ Beryllium mononitride cation
BN+ boron nitride cation
BN- boron nitride anion
BN boron nitride
CN- cyanide anion
CN+ Cyano cation
CN Cyano radical
N2 Nitrogen diatomic
N2+ diatomic nitrogen cation
N2- nitrogen diatomic anion
OH Hydroxyl radical
OH- hydroxide anion
OH+ hydoxyl cation
LiO- lithium oxide anion
LiO lithium oxide
LiO+ lithium oxide cation
BeO beryllium oxide
BeO+ Beryllium monoxide cation
BO- boron monoxide anion
BO+ boron monoxide cation
CO+ carbon monoxide cation
CO Carbon monoxide
CO- carbon monoxide anion
NO Nitric oxide
NO+ nitric oxide cation
NO- nitric oxide anion
O2- oxygen diatomic anion
O2+ diatomic oxygen cation
O2 Oxygen diatomic
HF- hydrogen fluoride anion
HF+ hydrogen fluoride cation
LiF- lithium fluoride anion
DF Hydrofluoric acid-d
HF Hydrogen fluoride
LiF lithium fluoride
BeF- Beryllium monofluoride anion
BeF+ Beryllium monofluoride cation
BF Boron monofluoride
BF+ Boron monofluoride cation
BF- Boron monofluoride anion
CF Fluoromethylidyne
CF+ carbon monofluoride cation
NF- nitrogen monofluorine anion
NF nitrogen fluoride
NF+ nitrogen monofluoirde cation
FO Oxygen monofluoride
FO+ fluorine monoxide cation
FO- flourine oxide anion
F2+ flourine diatomic cation
F2 Fluorine diatomic
F2- flourine diatomic anion
NeH+ neon hydrogen cation
NeH neon hydrogen
Ne2+ Neon dimer cation
Ne2 Neon dimer
Na2 Sodium diatomic
Na2- sodium dimer anion
Na2+ sodium dimer cation
NaLi lithium sodium
NaH+ sodium hydride cation
NaH sodium hydride
NaBe Sodium Beryllium
NaO sodium monoxide
NaF- sodium fluoride anion
NaF sodium fluoride
LiMg Lithium magnesium
NaMg Sodium Magnesium
BeMg Beryllium Magnesium
Mg2 Magnesium diatomic
MgO magnesium oxide
MgF+ magnesium fluoride cation
AlH aluminum monohydride
AlH+ aluminum monohydride cation
AlH- aluminum monohydride anion
Al2- aluminum dimer anion
Al2+ aluminum dimer cation
Al2 Aluminum diatomic
AlC Aluminum carbide
AlN Aluminum nitride
AlO+ aluminum monoxide cation
BAl Boron Aluminum
AlF Aluminum monofluoride
SiH+ silicon monohydride cation
SiH- silicon monohydride anion
SiH Silylidyne
Si2+ silcon dimer cation
SiC silicon monocarbide
SiO Silicon monoxide
SiF- silicon monofluoride anion
AlP Aluminum monophosphide
SiP- Silicon monophosphide anion
SiP Silicon monophosphide
P2+ phosphorus dimer cation
P2 Phosphorus diatomic
PO Phosphorus monoxide
LiS Lithium monosulfide
DS Mercapto-d
SH- mercapto anion
SH Mercapto radical
LiS+ Lithium sulfide cation
NaS Sodium sulfide
SiS silicon monosulfide
NS Mononitrogen monosulfide
PS phosphorus sulfide
NS- nitrogen sulfide anion
S2 Sulfur diatomic
SO Sulfur monoxide
S2+ sulfur dimer cation
SF Monosulfur monofluoride
HCl Hydrogen chloride
HCl+ hydrogen chloride cation
NaCl+ sodium chloride cation
LiCl- lithium chloride anion
LiCl lithium chloride
NaCl Sodium Chloride
LiCl+ lithium chloride cation
BeCl+ beryllium monochloride cation
BeCl beryllium chloride
AlCl- aluminum monochloride anion
AlCl Aluminum monochloride
AlCl+ aluminum monochloride cation
NCl+ nitrogen monochloride cation
NCl nitrogen monochloride
SCl sulfur monochloride
ClO Monochlorine monoxide
Cl2- chlorine diatomic anion
ClF Chlorine monofluoride
Cl2 Chlorine diatomic
ArH+ Argon hydride cation
Ar2 Argon dimer
LiK Lithium Potassium
K2 Potassium dimer
NaK Sodium Potassium
KH+ Potassium hydrogen cation
KO Potassium monoxide
KO+ Potassium monoxide cation
KCl Potassium Chloride
KF Potassium Fluoride
CaH Calcium monohydride
CaH+ Calcium monohydride cation
Ca2 Calcium dimer
ScH+ Scandium monohydride cation
ScH Scandium monohydride
ScO Scandium monoxide
ScF Scandium monofluoride
TiH Titanium monohydride
TiCl Titanium Monochloride
TiO Titanium monoxide
VO Vanadium monoxide
CuH Copper monohydride
ZnS Zinc sulfide
GaH Gallium monohydride
GaH+ Gallium monohydride cation
Ga2 Gallium diatomic
GaN Gallium mononitride
GaO Gallium monoxide
GaF Gallium monofluoride
GaCl Gallium monochloride
GeH germylidene
GeH+ Germaniun monohyrdide cation
GeC Germanium monocarbide
Ge2 Germanium dimer
GeO Germanium monoxide
GeS Germanium monosulfide
GeCl Germanium monochloride
GeF Germanium monofluoride
AsH Arsenic monohydride
AsH+ Arsenic monohydride cation
GaAs Gallium arsenide
As2 Arsenic diatomic
AsP Arsenic monophosphide
AsN Arsenic mononitride
AsO Arsenic monoxide
AsF Arsenic monofluoride
HSe+ selenium monohydride cation
CSe Carbon monoselenide
SeS Selenium monosulfide
SeF Selenium monofluoride
HBr hydrogen bromide
KBr Potassium Bromide
BBr Boron monobromide
NBr nitrogen monobromide
BrO Bromine monoxide
BrO- Bromine monoxide anion
IF Iodine monofluoride
ICl Iodine monochloride
IBr Iodine monobromide
I2 Iodine diatomic
H3+ hydrogen trimer cation
Li3 Lithium trimer
Li3+ Lithium trimer cation
BeH2+ Beryllium dihydride cation
BeH2+ Beryllium dihydride cation
BeH2 beryllium dihydride
BH2- boron dihydride anion
BH2+ Boron dihydride cation
CH2 Methylene
CH2+ methylene cation
CH2 Methylene
CH2- methylene anion
CH2+ methylene cation
C2H Ethynyl radical
C2H+ Ethynyl cation
C3 carbon trimer
C3 carbon trimer
NH2+ Amino cation
HCN- Hydrogen cyanide anion
HCN Hydrogen cyanide
LiCN lithium cyanide
HCN+ hydrogen cyanide cation
LiCN lithium cyanide
LiCN lithium cyanide
NNH+ Dinitrogen monohydride cation
CN2 3H-Diazirin-3-ylidene
N3+ azide cation
N3- azide anion
HDO Water-d1
H2O Water
Li2O+ dilithium oxide cation
H2O+ water cation
H2O- water anion
BeOH beryllium hydroxide
BeOH beryllium hydroxide
HCO- formyl anion
HNO- Nitrosyl hydride anion
HNO Nitrosyl hydride
HO2 Hydroperoxy radical
HO2- Hydroperoxy anion
HO2+ Hydroperoxy cation
CCO Dicarbon monoxide
BO2+ Boron dioxide cation
BO2- Boron dioxide anion
N2O- Nitrous oxide anion
CO2+ Carbon dioxide cation
CO2 Carbon dioxide
CO2- Carbon dioxide anion
N2O Nitrous oxide
NO2+ Nitrogen dioxide cation
O3 Ozone
BeF2 Beryllium fluoride
FCO+ Carbonyl fluoride cation
FCO Carbonyl fluoride
FNO Nitrosyl fluoride
CF2 Difluoromethylene
F3- trifluoride anion
Na2O disodium monoxide
NaCN Sodium Cyanide
NaCN Sodium Cyanide
NaCN Sodium Cyanide
MgH2 magnesium dihydride
MgF2 Magnesium fluoride
SiH2 silicon dihydride
SiF2 Silicon difluoride
SiF2+ Silicon difluoride cation
Li2S dilithium sulfide
H2S- Hydrogen sulfide anion
H2S Hydrogen sulfide
Li2S dilithium sulfide
HCS Thioformyl radical
HS2 Thiosulfeno radical
SiS2 Silicon disulfide
NNS Nitrogen sulfide
CS2- Carbon disulfide anion
CS2 Carbon disulfide
SO2- Sulfur dioxide anion
S3- Sulfur trimer anion
SO2 Sulfur dioxide
S3 Sulfur trimer
SF2- sulfur difluoride anion
SF2- sulfur difluoride anion
H2Cl+ dihydrogen monochloride cation
HCCl Chloromethylene
HOCl hypochlorous acid
ClCN chlorocyanogen
BeCl2 Beryllium chloride
ClCO carbonyl monochloride
CCl2- dichloromethylene anion
SCl2 Sulfur dichloride
Cl3- trichloride anion
CaH2 Calcium Hydride
CaH2 Calcium Hydride
CaCl2 Calcium Chloride
TiO2 Titanium dioxide
CuF2 Copper difluoride
ZnCl2 Zinc dichloride
GeH2- germylene anion
GeH2 germylene
GeO2 Germanium dioxide
GeS2 Germanium disulfide
GeF2 Germanium difluoride
GeCl2 Germanium dichloride
AsH2+ Arsenic dihydride cation
AsH2 Arsenic dihydride
AsO2 Aresenic dioxide
CSe2 Carbon diselenide
H2Br+ protonated hydrogen bromide
CHBr bromomethylene
HOBr Hypobromous acid
HOBr+ Hypobromous acid cation
BrNO Nitrosyl bromide
BrOBr Bromine oxide
KrF2 Krypton difluoride
BH3 boron trihydride
BH3- boron trihydride anion
CH3 Methyl radical
CH3- methyl anion
CH3+ methyl cation
C2H2 Acetylene
CCH2 vinylidene
C2H2+ acetylene cation
Li3N trilithium nitride
NH3 Ammonia
NH3+ ammonia cation
NH3- Ammonia anion
H2CN+ hydrocyanonium cation
N2H2 (Z)-Diazene
N2H2 trans-diazine
HCCN cyanomethylene
HCCN cyanomethylene
HN3 hydrogen azide
C2N2 Cyanogen
H3O+ hydronium cation
H2CO+ formaldehyde cation
H2CO- formaldehyde anion
H2CO Formaldehyde
HOCH hydroxycarbene
HOCH hydroxycarbene
H2O2+ Hydrogen peroxide cation
H2O2 Hydrogen peroxide
H2O2+ Hydrogen peroxide cation
HCNO fulminic acid
HCNO fulminic acid
HOCO Hydrocarboxyl radical
HCOO formate neutral radical
HOCO Hydrocarboxyl radical
CO3 Carbon trioxide
ONNO NO dimer
CO3-- carbonate
NO3- nitrate anion
NO3+ nitrogen trioxide cation
CH2F fluoromethyl radical
NH2F monofluoroamine
HCCF+ fluoroacetylene cation
HFCO+ formyl fluoride cation
CHF2 difluoromethyl radical
BF3- Borane, trifluoro- anion
BF3+ boron trifluoride cation
BF3 Borane, trifluoro-
CF3- Trifluoromethyl anion
CF3+ Trifluoromethyl cation
NF3- Nitrogen trifluoride anion
FOOF Perfluoroperoxide
NF3- Nitrogen trifluoride anion
AlH3+ aluminum trihydride cation
AlH3- aluminum trihydride anion
AlH3 aluminum trihydride
AlH3+ aluminum trihydride cation
AlF3 Aluminum trifluoride
SiH3- Silyl anion
SiH3 Silyl radical
SiH3+ Silyl cation
SiF3+ Silicon trifluoride cation
SiF3 Silicon trifluoride radical
PH3 Phosphine
PH3+ Phosphine cation
P4 Phosphorus tetramer
H3S+ Sulfonium cation
H2CS Thioformaldehyde
H2S2 Disulfane
SO3- Sulfur trioxide anion
SO3- Sulfur trioxide anion
F2SO Thionyl Fluoride
SF3 Sulfur trifluoride
NH2Cl chloramine
HCCCl Chloroacetylene
COHCl Formyl chloride
HOClO Chlorous acid
Cl2CS Thiophosgene
COFCl Carbonic chloride fluoride
ClONO chlorine nitrite
BCl3 Borane, trichloro-
CCl3- Trichloromethyl anion
CCl3+ Trichloromethyl cation
ClOOCl Dichlorine dioxide
ClF3 Chlorine trifluoride
ClF3 Chlorine trifluoride
ScH3 Scandium trihydride
ScH3 Scandium trihydride
ScF3 Scandium trifluoride
GaH3 Gallium trihydride
GaF3 Gallium trifluoride
GaCl3 Gallium trichloride
GeH3+ germyl cation
GeH3 Germyl radical
AsH3+ Arsine cation
AsH3 Arsine
As4 Arsenic tetramer
AsCl3 Arsenous trichloride
AsF3 Arsenic trifluoride
H3Se+ Hydrogen Selenide, protonated
SeO3 selenium trioxide
CH2Br bromomethyl radical
CH2Cl chloromethyl radical
CH2Cl chloromethyl radical
COBr2 Carbonic dibromide
BrONO Bromine nitrite
BBr3 Boron tribromide
PBr3 Phosphorus tribromide
NBr3 Nitrogen Tribromide
BH4- borohydride anion
BH4 borohydride
CD4 methane-d4
CH4+ Methane cation
CH4+ Methane cation
CH2D2 methane-d2
CH4 Methane
CH4+ Methane cation
CH3D methane-d
CHD3 methane-d3
CH2BH methyleneborane
C2H3 vinyl
C2H3+ vinyl cation
C2H3- vinyl anion
C2H3+ vinyl cation
NH4+ ammonium cation
CH2NN diazirine
CH2NN diazomethane
NH2CN cyanamide
HCCCN+ Cyanoacetylene cation
CH2OH+ hydroxymethyl cation
CH3O- methoxy anion
CH2OH Hydroxymethyl radical
NH3O Ammonia Oxide
H3O2+ hydrogen peroxide, protonated
CH2CO+ Ketene cation
NH2NO Nitrosamide
H2O3 Hydrogen trioxide
HCO3- bicarbonate anion
C3O2+ Carbon suboxide cation
BeCO3 Beryllium Carbonate
ONONO Nitrosyl nitrite
CD3F methylfluoride-d3
Mg(OH)2 Magnesium dihydroxide
Mg(OH)2 Magnesium dihydroxide
MgCO3 Magnesium Carbonate
SiH4 Silane
PH4+ phosphonium cation
H2POH Phosphinous acid
H2POH Phosphinous acid
H3PO Phosphine oxide
HSSSH trisulfane
SO2F2 Sulfuryl fluoride
CH3Cl Methyl chloride
CD3Cl methyl chloride d3
SiH2Cl2 dichlorosilane
CDCl3 trichloromethane-d
HClO3 Chloric Acid
HClO3 Chloric Acid
ClONO2 Chlorine nitrate
TiF4 Titanium tetrafluoride
GeH4 Germane
GeCl4 Germanium Tetrachloride
CH2ClBr Methane, bromochloro-
CHBrCl2 Methane, bromodichloro-
CHClBr2 Methane, dibromochloro-
CHBrF2 Methane, bromodifluoro-
BrONO2 Bromine nitrate
CBrCl3 Methane, bromotrichloro-
CBrClF2 Methane, bromochlorodifluoro-
CBr2F2 Methane, dibromodifluoro-
LiBH4 Lithium borohydride
B2H4 Diborane(4) D2d
HBHHBH Diborane(4) C2V
CH3CH methylmethylene
C2H4- Ethylene anion
C2H4 Ethylene
C2H4+ Ethylene cation
C3H3- Propargyl anion
C3H3 cyclopropenyl radical
C3H3+ cyclopropenyl cation
C3H3+ Propargyl cation
C4H2 Diacetylene
C4H2+ diacetlyene cation
CH2NH2+ methyleneamine cation
N2H4+ hydrazine cation
CH3CN+ Acetonitrile cation
CH3OH- Methyl alcohol anion
CH3OH Methyl alcohol
CH3OH- Methyl alcohol anion
CH3OH+ Methyl alcohol cation
CH2BOH hydroxy(methylene)borane
BH3CO Borane carbonyl
H2OH2O water dimer
CH3BO Borane, methyloxo-
CH2CHO Vinyloxy radical
CH3CO+ acetyl cation
CHONH2 formamide
CH2NOH formaldoxime
CH3NO nitrosomethane
CHONH2 formamide
HOCHNH hydroxymethylimine
CNOH3 1,2-oxaziridine
HOCHNH hydroxymethylimine
CH3OO- methylperoxy anion
H2CO3 Carbonic acid
H2NO3+ Nitric Acid, Protonated
HOONO2 peroxy nitric acid
CF3OH trifluoromethanol
CF3OF Trifluoromethylhypofluorite
NaOCH3 Sodium methoxide
Na2CO3 Sodium Carbonate
H2SO3 Sulfurous acid
HSO4- bisulfate anion
SF5 Sulfur pentafluoride
CH3OCl methyl hypochlorite
HClO4 perchloric acid
B2Cl4 Diboron tetrachloride
ClF5 chlorinepentafluoride
AsF5 Arsenic pentafluoride
CH3SeH Methane selenol
C2H5- Ethyl anion
CH2CCH2 allene
CH3NH2+ methyl amine cation
CH3NH2 methyl amine
CH2CHNH vinylazine
CH3CHN methylmethaniminyl radical
CH2CHNH vinylazine
C3H3N+ acrylonitrile cation
CH2N4 1H-Tetrazole
CH3OH2+ Methanol, protonated
C2H4O Ethylene oxide
H2CONH2+ protonated formamide
CH2(OH)2 methanediol
NH2COOH Carbamic acid
NH2COOH Carbamic acid
H3CO3+ carbonic acid, protonated
C3H2O2 Propiolic acid
CF3CHO trifluoroacetaldehyde
CF3COF trifluoroacetyl fluoride
PF6- Hexafluorophosphate ion
H2SO4 Sulfuric acid
CH2ClCHO chloroacetaldehyde
CHCl2CHO dichloroacetaldehyde
CCl3CHO trichloroacetaldehyde
SF5Cl sulfur chloropentafluoride
H2SeO4 Selenic acid
SeF6 Selenium hexafluoride
C2H6 Ethane
C2H6+ ethane cation
C2H6 Ethane
C2H6+ ethane cation
C3H5 Allyl radical
C3H5 Allyl radical
C3H5+ Allyl cation
CH3CHCH 1-propenyl radical
C4H4 cyclobutadiene
C6H2 hexatriyne
CH3NH3+ protonated methylamine
NH3NH3 Ammonia Dimer
NH3NH3 Ammonia Dimer
CH3CHNH ethanimine
C3H3N2- imidizolyl anion
C3H3N2 imidazolyl radical
C4H2N2 Fumaronitrile
CH2CH2OH 2-hydroxy ethyl radical
CH3CHOH+ acetaldehyde, protonated
CH3OCH2 methoxymethyl radical
CH3CH2O Ethoxy radical
NH2COOH2+ Carbamic acid, O-protonated
NH3COOH+ protonated Carbamic acid
C3H3NO Oxazole
C2H4F2 1,2-difluoroethane
C2H4F2 1,2-difluoroethane
CHF2CHF2 1,1,2,2-tetrafluoroethane
CF3COOH trifluoroacetic acid
C4F4 tetrafluorcyclobutadiene
C4F4 tetrafluorcyclobutadiene
Al2H6 dialane
SiH3CCl3 (trichloromethyl)silane
H3PO4 Phosphoric Acid
CH2ClCH2Cl Ethane, 1,2-dichloro-
CH2FCH2Cl Ethane, 1-chloro-2-fluoro-
CH2FCH2Cl Ethane, 1-chloro-2-fluoro-
SiCl3CH3 methyltrichlorosilane
CH3CF2Cl 1-Chloro-1,1-Difluoroethane
CF3CH2Cl 2,2,2-Trifluoroethyl chloride
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi-
CF3CF2Cl pentafluorochloroethane
CF2ClCF2Cl 1,2-Dichloro-1,1,2,2-tetrafluoroethane
Ga2H6 digallane
GeH3CH3 methyl germane
CH2BrCH2Br Ethane, 1,2-dibromo-
CH3CBr3 1,1,1-tribromoethane
C2H7+ Ethane, protonated
C3H6 Cyclopropane
CH2CHCH3 Propene
NH2CH2NH2 diaminomethane
CH5N3 Guanidine
C4H4N- pyrrolide anion
C4H4N pyrrolide radical
C3H4N2 4H-Imidazole
C(CN)4 tetracyanomethane
C2H5OO ethylperoxy radical
H2NCOHNH2+ urea, protonated
C3H4O2 Methyl glyoxal
HOCHCCHOH allenediol
C2H4O3 1,2,3-trioxolane
HOCH2COOH Hydroxyacetic acid
CH3CH2SH ethanethiol
C4H3ClO Furan, 2-chloro
C3Cl3N3 1,3,5-Triazine, 2,4,6-trichloro-
CH2CHCHCH2 1,3-Butadiene
CHCCH2CH3 1-Butyne
C5H5- cylopentadienyl anion
C5H5 cyclopentadienyl radical
CH3NNCH3 (Z)-1,2-Dimethyldiazene
CH3NNCH3 (E)-1,2-Dimethyldiazene
CH6N3+ guanidinium
CH6N3+ guanidinium
C6N4 Tetracyanoethylene
C3H6O Oxetane
CH3COCH3- acetone anion
C3H6O Oxetane
C2H4CO3 Ethylene carbonate
C2H4CO3 Ethylene carbonate
C4F6 perfluorobutadiene
CH3CSCH3 Thioacetone
CH3CH2CH2Br n-propyl bromide
CH3CHBrCH3 i-propyl bromide
CH3CHCHCH2 methylallyl radical
C6H5- phenyl anion
HOCH2CH2NH2 monoethanolamine
CH2CHOCHCH2 Vinyl ether
CH3CH2COOH Propanoic Acid
CH3CHClCH3 Propane, 2-chloro-
C4H8 cyclobutane
C5H7 cyclopentenyl radical
C6H6 Trimethylenecycopropane
C6H6 Benzene
CH3CH(CH3)CN Propanenitrile, 2-methyl-
CH3CH2CH2CN Butanenitrile
C5H6N+ Pyridinium
CH3OC2H5 Ethane, methoxy-
C5H6O 2-methylfuran
C5H6O 3-Methylfuran
C4H6O2 Crotonic Acid
C3H3N3O3 cyanuric acid
CH2ClCHCHCH3 2-Butene, 1-chloro-
C5H8 1-pentyne
C5H8 1,3-Pentadiene, (Z)-
C4H7NO Ethoxyacetonitrile
C3H7ONO Propyl nitrite
C6H6O 2,5-Cyclohexadienone
As(CH3)3 trimethyl arsine
B4H10 Tetraborane(10)
C8H6 Calicene
C6H8 (E)-hexa-2,3,4-triene
C8H6 benzocyclobutadiene
C5H8O Methyl cyclopropyl ketone
C5H8O Cyclopentanone
C4H8O2 Ethyl acetate
C4H10O 1-Butanol
C5H10O 2-methylbutyraldehyde
C9H8 spiro[4.4]nona-1,3,6,8-tetraene
NC4H12+ tetramethyl ammonium cation
C6H12 2,3-dimethylbut-1-ene
C6H12 (Z)-hex-3-ene
(CH3)3CC(CH3)3 tetramethylbutane
C9H20 Nonane