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	-79.583180
Energy at 298.15K	-79.589101
HF Energy	-79.234121
Nuclear repulsion energy	41.834065

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	A_1g	3047	2983
2	A_1g	1425	1395
3	A_1g	1025	1003
4	A_1u	325	318
5	A_2u	3042	2977
6	A_2u	1394	1364
7	E_g	3114	3048
7	E_g	3114	3048
8	E_g	1492	1461
8	E_g	1492	1460
9	E_g	1217	1191
9	E_g	1217	1191
10	E_u	3136	3070
10	E_u	3136	3069
11	E_u	1495	1464
11	E_u	1494	1463
12	E_u	816	799
12	E_u	816	799

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.768
C2	0.000	0.000	-0.768
H3	0.000	1.032	1.168
H4	-0.893	-0.516	1.168
H5	0.893	-0.516	1.168
H6	0.000	-1.032	-1.168
H7	-0.893	0.516	-1.168
H8	0.893	0.516	-1.168

	C1	C2	H3	H4	H5	H6	H7	H8
C1		1.5358	1.1066	1.1066	1.1066	2.1938	2.1938	2.1938
C2	1.5358		2.1938	2.1938	2.1938	1.1066	1.1066	1.1066
H3	1.1066	2.1938		1.7870	1.7870	3.1171	2.5540	2.5540
H4	1.1066	2.1938	1.7870		1.7870	2.5540	2.5540	3.1171
H5	1.1066	2.1938	1.7870	1.7870		2.5540	3.1171	2.5540
H6	2.1938	1.1066	3.1171	2.5540	2.5540		1.7870	1.7870
H7	2.1938	1.1066	2.5540	2.5540	3.1171	1.7870		1.7870
H8	2.1938	1.1066	2.5540	3.1171	2.5540	1.7870	1.7870

All results from a given calculation for C₂H₆ (Ethane)

using model chemistry: CCSD(T)/cc-pVDZ

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	111.204	C1	C2	H7	111.204
C1	C2	H8	111.204	C2	C1	H3	111.204
C2	C1	H4	111.204	C2	C1	H5	111.204
H3	C1	H4	107.684	H3	C1	H5	107.684
H4	C1	H5	107.684	H6	C2	H7	107.684
H6	C2	H8	107.684	H7	C2	H8	107.684

	hartrees
Energy at 0K	-79.578188
Energy at 298.15K
HF Energy	-79.228864
Nuclear repulsion energy	41.658586

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	A₁'	3058	2993
2	A₁'	1437	1406
3	A₁'	1020	998
4	A₁"	320i	313i
5	A₂"	3047	2982
6	A₂"	1389	1360
7	E'	3139	3073
7	E'	3139	3073
8	E'	1497	1465
8	E'	1497	1465
9	E'	888	870
9	E'	888	869
10	E"	3119	3053
10	E"	3119	3053
11	E"	1489	1457
11	E"	1488	1457
12	E"	1164	1139
12	E"	1164	1139

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.775
C2	0.000	0.000	-0.775
H3	0.000	1.027	1.184
H4	-0.890	-0.514	1.184
H5	0.890	-0.514	1.184
H6	0.000	1.027	-1.184
H7	0.890	-0.514	-1.184
H8	-0.890	-0.514	-1.184

	C1	C2	H3	H4	H5	H6	H7	H8
C1		1.5501	1.1058	1.1058	1.1058	2.2121	2.2121	2.2121
C2	1.5501		2.2121	2.2121	2.2121	1.1058	1.1058	1.1058
H3	1.1058	2.2121		1.7794	1.7794	2.3681	2.9621	2.9621
H4	1.1058	2.2121	1.7794		1.7794	2.9621	2.9621	2.3681
H5	1.1058	2.2121	1.7794	1.7794		2.9621	2.3681	2.9621
H6	2.2121	1.1058	2.3681	2.9621	2.9621		1.7794	1.7794
H7	2.2121	1.1058	2.9621	2.9621	2.3681	1.7794		1.7794
H8	2.2121	1.1058	2.9621	2.3681	2.9621	1.7794	1.7794

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C2	H6	111.708	C1	C2	H7	111.708
C1	C2	H8	111.708	C2	C1	H3	111.708
C2	C1	H4	111.708	C2	C1	H5	111.708
H3	C1	H4	107.145	H3	C1	H5	107.145
H4	C1	H5	107.145	H6	C2	H7	107.145
H6	C2	H8	107.145	H7	C2	H8	107.145

All results from a given calculation for C2H6 (Ethane)

using model chemistry: CCSD(T)/cc-pVDZ

States and conformations

Conformer 1 (D3D)

Conformer 2 (D3H)

All results from a given calculation for C₂H₆ (Ethane)