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	C2H	¹A_g
1	2	no	C2	¹A

	hartrees
Energy at 0K	-5224.417785
Energy at 298.15K
HF Energy	-5222.845614
Nuclear repulsion energy	419.990882

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A_g	3139	3139	0.00
2	A_g	1519	1519	0.00
3	A_g	1328	1328	0.00
4	A_g	1098	1098	0.00
5	A_g	717	717	0.00
6	A_g	198	198	0.00
7	A_u	3220	3220	0.05
8	A_u	1138	1138	2.51
9	A_u	768	768	2.81
10	A_u	107	107	4.19
11	B_g	3197	3197	0.00
12	B_g	1314	1314	0.00
13	B_g	978	978	0.00
14	B_u	3145	3145	6.52
15	B_u	1515	1515	7.77
16	B_u	1245	1245	51.56
17	B_u	643	643	52.53
18	B_u	186	186	5.35

Atom	x (Å)	y (Å)	z (Å)
C1	0.490	0.572	0.000
C2	-0.490	-0.572	0.000
Br3	-0.490	2.249	0.000
Br4	0.490	-2.249	0.000
H5	1.112	0.571	0.887
H6	1.112	0.571	-0.887
H7	-1.112	-0.571	0.887
H8	-1.112	-0.571	-0.887

	C1	C2	Br3	Br4	H5	H6	H7	H8
C1		1.5066	1.9417	2.8217	1.0840	1.0840	2.1589	2.1589
C2	1.5066		2.8217	1.9417	2.1589	2.1589	1.0840	1.0840
Br3	1.9417	2.8217		4.6037	2.4840	2.4840	3.0212	3.0212
Br4	2.8217	1.9417	4.6037		3.0212	3.0212	2.4840	2.4840
H5	1.0840	2.1589	2.4840	3.0212		1.7749	2.5003	3.0662
H6	1.0840	2.1589	2.4840	3.0212	1.7749		3.0662	2.5003
H7	2.1589	1.0840	3.0212	2.4840	2.5003	3.0662		1.7749
H8	2.1589	1.0840	3.0212	2.4840	3.0662	2.5003	1.7749

All results from a given calculation for CH₂BrCH₂Br (Ethane, 1,2-dibromo-)

using model chemistry: CCSD=FULL/6-311+G(3df,2p)

States and conformations

Conformer 1 (C2H)

Conformer 2 (C2)

	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	Br4	109.171	C1	C2	H7	111.850
C1	C2	H8	111.850	C2	C1	Br3	109.171
C2	C1	H5	111.850	C2	C1	H6	111.850
Br3	C1	H5	106.912	Br3	C1	H6	106.912
Br4	C2	H7	106.912	Br4	C2	H8	106.912
H5	C1	H6	109.900	H7	C2	H8	109.900

	hartrees
Energy at 0K	-5224.414772
Energy at 298.15K
HF Energy	-5222.841511
Nuclear repulsion energy	454.426502

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A	3181	3181	0.11
2	A	3124	3124	14.88
3	A	1501	1501	0.43
4	A	1342	1342	17.43
5	A	1229	1229	0.76
6	A	1069	1069	0.47
7	A	938	938	5.82
8	A	592	592	5.84
9	A	234	234	1.04
10	A	83	83	0.22
11	B	3194	3194	0.80
12	B	3115	3115	2.22
13	B	1498	1498	11.66
14	B	1316	1316	56.93
15	B	1155	1155	1.54
16	B	875	875	14.21
17	B	628	628	10.88
18	B	366	366	4.51

Atom	x (Å)	y (Å)	z (Å)
C1	0.311	0.687	1.172
C2	-0.311	-0.687	1.172
Br3	-0.311	1.788	-0.292
Br4	0.311	-1.788	-0.292
H5	0.033	1.211	2.083
H6	1.392	0.639	1.096
H7	-0.033	-1.211	2.083
H8	-1.392	-0.639	1.096

	C1	C2	Br3	Br4	H5	H6	H7	H8
C1		1.5081	1.9343	2.8755	1.0868	1.0847	2.1333	2.1590
C2	1.5081		2.8755	1.9343	2.1333	2.1590	1.0868	1.0847
Br3	1.9343	2.8755		3.6293	2.4681	2.4789	3.8355	2.9969
Br4	2.8755	1.9343	3.6293		3.8355	2.9969	2.4681	2.4789
H5	1.0868	2.1333	2.4681	3.8355		1.7741	2.4231	2.5351
H6	1.0847	2.1590	2.4789	2.9969	1.7741		2.5351	3.0624
H7	2.1333	1.0868	3.8355	2.4681	2.4231	2.5351		1.7741
H8	2.1590	1.0847	2.9969	2.4789	2.5351	3.0624	1.7741

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C2	Br4	112.710	C1	C2	H7	109.521
C1	C2	H8	111.711	C2	C1	Br3	112.710
C2	C1	H5	109.521	C2	C1	H6	111.711
Br3	C1	H5	106.138	Br3	C1	H6	106.997
Br4	C2	H7	106.138	Br4	C2	H8	106.997
H5	C1	H6	109.569	H7	C2	H8	109.569

All results from a given calculation for CH2BrCH2Br (Ethane, 1,2-dibromo-)

using model chemistry: CCSD=FULL/6-311+G(3df,2p)

States and conformations

Conformer 1 (C2H)

Conformer 2 (C2)

All results from a given calculation for CH₂BrCH₂Br (Ethane, 1,2-dibromo-)