CCCBDB calculation results Page

Home
- All data for one species
- Geometry
  - Experimental
  - Calculated
  - Comparisons
  - Bad Calculations
    - Bad moment of inertia
  - Tutorials and Explanations
    - Angle formulas
- Vibrations
  - Experimental
    - Vibrational frequencies
  - Calculated
    - Frequencies
  - Scale factors
- Reactions
- Entropies
- Ions
  - List Ions
  - Energy
    - Calculated Ionization Energy
    - Compare Ionzation energy
  - Electron Affinity
    - Calculated Electron affinity
    - Compare Electron affinity
  - Proton Affinity
    - Calculated Proton affinity
    - Compare Proton affinity
  - Ionization changes point group
Experimental
Calculated
- Energy
  - Optimized
  - Reaction
    - Reaction Energy 0K
    - Reaction Energy 298K
  - Internal Rotation
  - Orbital
  - Nuclear repulsion energy
  - Correlation
    - Full vs Frozen core energies
    - Partial correlation energies
  - Ion
  - Excited State
  - Basis Set Extrapolation
    - BSE energy
    - BSE Bond lengths
- Geometry
  - Calculated geometry
    - AIM bond orders
    - One type of bond
  - Rotation
  - Point group
  - State symmetry
  - <r2>
    - Sorted by r2
  - Z-matrix
  - Bad Calculations
- Vibrations
  - Frequencies
    - Animated vibrations
    - Anharmonic
  - Zero point energy (ZPE)
  - Scale Factors
  - Bad Calculations
- Electrostatics
  - Charges
  - Dipole
  - Quadrupole
  - Polarizability
  - Spin
    - Spin density
- Entropy and Heat Capacity
- Reaction
  - Reaction Energy 0K
  - Reaction Energy 298K
  - Isodesmic reactions
  - Transition State
- Lookup by property
  - By frequency
Comparisons
- Geometry
- Vibrations
- Energy
  - Reaction
  - Single point vs optimized
  - DFT grid size on energy
  - Semiempirical enthalpy
  - Internal rotation
  - Similar molecules
- Entropy
- Electrostatics
- Ion
Resources
- Info on Results
  - Calculations Done
  - Basis functions used
  - I/O files
- Glossary
- Conversion Forms
- Links
  - NIST Links
  - External links
- Thermochemistry
- Tutorials
  - Vibrations
    - Why scale vibrations
    - Zero-point energies
  - Entropy
    - Methyl rotor entropy
    - Entropy and conformations
  - Energy
  - Electrostatics
    - Dipole parts by point group
    - Quadrupoles
  - Geometry
    - Angle formulas
  - Cost
    - Cost Comparison
    - Timings Comparison
- Bad Calculations
  - Geometry
  - Vibrations
  - Low excited states
  - Oddities
    - NaCN Is not linear
FAQ Help
- Units
  - Choose Units
  - Explanations
- Credits
- Just show me
  - Show me a calculated geometry
- Summary
- Using
- List
  - Recent molecules
    - Choose a few
  - Molecules
  - Geometry
  - Vibrations
    - Big anharmonicity
  - Energy
    - Enthalpy at 0 Kelvin
  - Similar molecules
  - Ions, Dipoles, etc.
- Index of CCCBDB
- Feedback
  - Error form
  - Wants

State	Conformation	minimum conformation	conformer description	state description
1	1	yes	D3D	¹A_1g
1	2	no	D3H	¹A₁^'

	hartrees
Energy at 0K	-79.758749
Energy at 298.15K	-79.764661
HF Energy	-79.265224
Nuclear repulsion energy	42.386538

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	A_1g	3052	2947
2	A_1g	1433	1384
3	A_1g	1021	986
4	A_1u	307	296
5	A_2u	3052	2947
6	A_2u	1412	1364
7	E_g	3112	3005
7	E_g	3112	3005
8	E_g	1517	1464
8	E_g	1516	1464
9	E_g	1230	1188
9	E_g	1230	1188
10	E_u	3135	3027
10	E_u	3135	3027
11	E_u	1517	1465
11	E_u	1517	1465
12	E_u	826	797
12	E_u	826	797

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.761
C2	0.000	0.000	-0.761
H3	0.000	1.014	1.155
H4	-0.879	-0.507	1.155
H5	0.879	-0.507	1.155
H6	0.000	-1.014	-1.155
H7	-0.879	0.507	-1.155
H8	0.879	0.507	-1.155

	C1	C2	H3	H4	H5	H6	H7	H8
C1		1.5223	1.0882	1.0882	1.0882	2.1681	2.1681	2.1681
C2	1.5223		2.1681	2.1681	2.1681	1.0882	1.0882	1.0882
H3	1.0882	2.1681		1.7571	1.7571	3.0744	2.5228	2.5228
H4	1.0882	2.1681	1.7571		1.7571	2.5228	2.5228	3.0744
H5	1.0882	2.1681	1.7571	1.7571		2.5228	3.0744	2.5228
H6	2.1681	1.0882	3.0744	2.5228	2.5228		1.7571	1.7571
H7	2.1681	1.0882	2.5228	2.5228	3.0744	1.7571		1.7571
H8	2.1681	1.0882	2.5228	3.0744	2.5228	1.7571	1.7571

All results from a given calculation for C₂H₆ (Ethane)

using model chemistry: CCSD(T)=FULL/cc-pVQZ

States and conformations

Conformer 1 (D3D)

Conformer 2 (D3H)

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
	Home All data for one species Geometry Experimental Experimental Geometries Same bond/angle many molecules Internal Coordinates by type Bond angles Calculated Calculated geometry Rotational constant Moments of inertia Products of moments of inertia BSE Bond lengths Show me a calculated geometry Comparisons Bonds, angles Rotational Constants Products of moments of inertia Point group Bad Calculations Bad moment of inertia Tutorials and Explanations Angle formulas Vibrations Experimental Vibrational frequencies Calculated Frequencies Scale factors Reactions Entropies Ions List Ions Energy Calculated Ionization Energy Compare Ionzation energy Electron Affinity Calculated Electron affinity Compare Electron affinity Proton Affinity Calculated Proton affinity Compare Proton affinity Ionization changes point group Experimental One molecule all properties One property a few molecules Enthalpy of formation Entropy Integrated Heat Capacity Heat Capacity Rotational Constants Vibrational Frequencies Dipole moment Ionization Energy Polarizability Quadrupole Point Groups Geometry Experimental Geometries Internal Coordinates by type Bond angles Rotational Constants Point Groups Diatomic bond lengths Vibrations Vibrational frequencies Diatomic Triatomics Energy Atomization Energy Internal Rotation Electrostatics Dipole Quadrupole Polarizability Reference Data Reference states Spin Splittings Molecules with good enthalpy Enthalpy at 0 Kelvin Calculated Energy Optimized Energy Energy 298K Minimum conformation Hydrogen bonds H bond with counterpoise Reaction Reaction Energy 0K Reaction Energy 298K Internal Rotation Barriers to internal rotation Rotational barrier and dipole Rotational Barrier 2 molecules Orbital HOMO LUMO gap HOMO Orbital Energies Nuclear repulsion energy Correlation Full vs Frozen core energies Partial correlation energies Ion Calculated Ionization Energy Vertical ionization Energy Calculated Electron affinity Calculated Proton affinity Atom charge differences Excited State Singlet triplet gap Electronic state Transition state Basis Set Extrapolation BSE energy BSE Bond lengths Geometry Calculated geometry AIM bond orders One type of bond Rotation Rotational constant Products of moments of inertia Moments of inertia Inertial defects Second moments Point group State symmetry <r2> Sorted by r2 Z-matrix Bad Calculations Bad moment of inertia Bad Calculated Bond Lengths Bad point group Worst molecules Vibrations Frequencies Animated vibrations Anharmonic Zero point energy (ZPE) Scale Factors Scale factors Scale factor uncertainty Calculate a scale factor Why scale vibrations Set scaling factors Bad Calculations Bad Vib. HF vs MP2 Bad vib. Calc. vs exp. Big anharmonicity Electrostatics Charges Mulliken CHELP Aim ESP Dipole Dipole Dipole angle Dipole calculation types Quadrupole Polarizability Spin Spin density Entropy and Heat Capacity Entropy Reaction entropy Heat Capacity Reaction Reaction Energy 0K Reaction Energy 298K Isodesmic reactions Transition State Transition state Transition state frequencies Transition state geometries IRC Lookup by property By frequency Comparisons Geometry Bonds, angles Bond, angle, or dihedral DFT grid size on point group DFT grid on bond length Core correlation - bond length Same bond/angle many molecules Isoelectronic diatomics Isoelectronic triatomic angles Average bond lengths Rotation Rotational Constants Products of moments of inertia Point group Vibrations Vibrations 2 calculations Frequency differences One frequency Zero point energy Intensity Intensity for one mode Vibrational intensities Reduced mass comparison Anharmonic Triatomic Scale factors Energy Reaction Reaction Energy 0K Reaction Energy 298K Atomization 0K Atomization 298K Single point vs optimized DFT grid size on energy Semiempirical enthalpy Internal rotation Similar molecules Conformation Sets of isomers Sets of tautomers Isomers Entropy Entropy Heat capacity Entropy of several molecules Integrated heat capacity Reaction entropy Electrostatics Dipole Polarizability Several molecules Quadrupole Ion Compare Ionzation energy Koopman ionization energy Koopman IE for a few molecules Compare Electron affinity Compare Proton affinity Protonation Site Resources Info on Results Calculations Done Method and basis set List molecules One molecule Multiple conformers, states Multiple conformers, states Basis functions used I/O files Input/output files MOL file Z-matrix wfn files Glossary Conversion Forms B to I, I to B Angle formulas Integrated heat Capacity Calculating Enthalpy Links NIST Links NIST webbook bibliographic data CCCBDB Experimental data External links Basis Set Exchange Computational Chemistry List Thermochemistry in Gaussian Minnesota Database Collection Benchmark Energy and Geometry Point Groups Thermochemistry Thermochemistry Molecules with good enthalpy A → B + C Reference states Tutorials Vibrations Why scale vibrations Zero-point energies Entropy Methyl rotor entropy Entropy and conformations Energy Getting enthalpy of formation Vertical vs adiabatic IE Thermo from calculations Electrostatics Dipole parts by point group Quadrupoles Geometry Angle formulas Cost Cost Comparison Timings Comparison Bad Calculations Geometry Bad moment of inertia Bad Calculated Bond Lengths Bad point group Worst molecules Vibrations Bad vib. Calc. vs exp. Bad Vib. HF vs MP2 Bad scale factors Low excited states Oddities NaCN Is not linear FAQ Help Units Choose Units Energy Bond length Rotational Constant Moment of Inertia Dipole and Quadrupole Polarizability Explanations Hartree cm-1 Debye Credits Just show me Show me a calculated geometry Summary Using older interface Limit Basis sets Method options List Recent molecules Choose a few Molecules Number of atoms By heavy atoms Diatomics InChI Deuterated Dimers Geometry Point group Point group count Bonds types Isodesmic reactions Bad point group Multiple conformers, states Vibrations Big anharmonicity Energy Enthalpy at 0 Kelvin Similar molecules Similar Isomers Cis/trans Tautomers Multiple conformers, states Ions, Dipoles, etc. List Ions Ionization changes point group Dipole Quadrupole Polarizability Proton Affinities Index of CCCBDB Feedback Error form Wants
You are here: Calculated > Energy > Optimized > Energy

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C2	H6	111.213	C1	C2	H7	111.213
C1	C2	H8	111.213	C2	C1	H3	111.213
C2	C1	H4	111.213	C2	C1	H5	111.213
H3	C1	H4	107.675	H3	C1	H5	107.675
H4	C1	H5	107.675	H6	C2	H7	107.675
H6	C2	H8	107.675	H7	C2	H8	107.675

	hartrees
Energy at 0K	-79.754380
Energy at 298.15K
HF Energy	-79.260382
Nuclear repulsion energy	42.223128

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	A₁'	3066	2961
2	A₁'	1446	1397
3	A₁'	1018	983
4	A₁"	305i	295i
5	A₂"	3058	2953
6	A₂"	1411	1363
7	E'	3141	3033
7	E'	3141	3033
8	E'	1525	1473
8	E'	1523	1471
9	E'	900	869
9	E'	900	869
10	E"	3120	3013
10	E"	3120	3012
11	E"	1514	1462
11	E"	1513	1461
12	E"	1181	1141
12	E"	1181	1140

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.768
C2	0.000	0.000	-0.768
H3	0.000	1.010	1.169
H4	-0.875	-0.505	1.169
H5	0.875	-0.505	1.169
H6	0.000	1.010	-1.169
H7	0.875	-0.505	-1.169
H8	-0.875	-0.505	-1.169

	C1	C2	H3	H4	H5	H6	H7	H8
C1		1.5359	1.0872	1.0872	1.0872	2.1848	2.1848	2.1848
C2	1.5359		2.1848	2.1848	2.1848	1.0872	1.0872	1.0872
H3	1.0872	2.1848		1.7501	1.7501	2.3383	2.9208	2.9208
H4	1.0872	2.1848	1.7501		1.7501	2.9208	2.9208	2.3383
H5	1.0872	2.1848	1.7501	1.7501		2.9208	2.3383	2.9208
H6	2.1848	1.0872	2.3383	2.9208	2.9208		1.7501	1.7501
H7	2.1848	1.0872	2.9208	2.9208	2.3383	1.7501		1.7501
H8	2.1848	1.0872	2.9208	2.3383	2.9208	1.7501	1.7501

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C2	H6	111.656	C1	C2	H7	111.656
C1	C2	H8	111.656	C2	C1	H3	111.656
C2	C1	H4	111.656	C2	C1	H5	111.656
H3	C1	H4	107.201	H3	C1	H5	107.201
H4	C1	H5	107.201	H6	C2	H7	107.201
H6	C2	H8	107.201	H7	C2	H8	107.201

All results from a given calculation for C2H6 (Ethane)

using model chemistry: CCSD(T)=FULL/cc-pVQZ

States and conformations

Conformer 1 (D3D)

Conformer 2 (D3H)

All results from a given calculation for C₂H₆ (Ethane)