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

	hartrees
Energy at 0K	-872.938043
Energy at 298.15K	-872.945780
HF Energy	-872.808024
Nuclear repulsion energy	192.481750

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁	2247	2247	141.05
2	A₁	2239	2239	15.73
3	A₁	2216	2216	66.67
4	A₁	970	970	74.26
5	A₁	946	946	2.33
6	A₁	908	908	193.13
7	A₁	574	574	6.36
8	A₁	386	386	0.55
9	A₁	97	97	1.39
10	A₂	2244	2244	0.00
11	A₂	963	963	0.00
12	A₂	718	718	0.00
13	A₂	425	425	0.00
14	A₂	91	91	0.00
15	B₁	2249	2249	234.61
16	B₁	2224	2224	26.97
17	B₁	967	967	77.71
18	B₁	604	604	9.64
19	B₁	320	320	20.13
20	B₁	107	107	0.05
21	B₂	2245	2245	76.14
22	B₂	2235	2235	97.49
23	B₂	963	963	37.29
24	B₂	896	896	331.83
25	B₂	731	731	296.95
26	B₂	465	465	8.72
27	B₂	440	440	15.68

Atom	x (Å)	y (Å)	z (Å)
Si1	0.000	0.000	0.898
Si2	0.000	1.942	-0.422
Si3	0.000	-1.942	-0.422
H4	1.198	0.000	1.772
H5	-1.198	0.000	1.772
H6	0.000	3.158	0.423
H7	0.000	-3.158	0.423
H8	1.201	1.968	-1.287
H9	-1.201	1.968	-1.287
H10	-1.201	-1.968	-1.287
H11	1.201	-1.968	-1.287

	Si1	Si2	Si3	H4	H5	H6	H7	H8	H9	H10	H11
Si1		2.3485	2.3485	1.4835	1.4835	3.1935	3.1935	3.1761	3.1761	3.1761	3.1761
Si2	2.3485		3.8849	3.1662	3.1662	1.4800	5.1698	1.4803	1.4803	4.1808	4.1808
Si3	2.3485	3.8849		3.1662	3.1662	5.1698	1.4800	4.1808	4.1808	1.4803	1.4803
H4	1.4835	3.1662	3.1662		2.3967	3.6373	3.6373	3.6374	4.3576	4.3576	3.6374
H5	1.4835	3.1662	3.1662	2.3967		3.6373	3.6373	4.3576	3.6374	3.6374	4.3576
H6	3.1935	1.4800	5.1698	3.6373	3.6373		6.3157	2.4045	2.4045	5.5349	5.5349
H7	3.1935	5.1698	1.4800	3.6373	3.6373	6.3157		5.5349	5.5349	2.4045	2.4045
H8	3.1761	1.4803	4.1808	3.6374	4.3576	2.4045	5.5349		2.4023	4.6105	3.9352
H9	3.1761	1.4803	4.1808	4.3576	3.6374	2.4045	5.5349	2.4023		3.9352	4.6105
H10	3.1761	4.1808	1.4803	4.3576	3.6374	5.5349	2.4045	4.6105	3.9352		2.4023
H11	3.1761	4.1808	1.4803	3.6374	4.3576	5.5349	2.4045	3.9352	4.6105	2.4023

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
S1	S2	H6	111.007	S1	S2	H8	110.024
S1	S2	H9	110.024	S1	S3	H7	111.007
S1	S3	H10	110.024	S1	S3	H11	110.024
S2	S1	S3	111.604	S2	S1	H4	109.348
S2	S1	H5	109.348	S3	S1	H4	109.348
S3	S1	H5	109.348	H4	S1	H5	107.763
H6	S2	H8	108.630	H6	S2	H9	108.630
H7	S3	H10	108.630	H7	S3	H11	108.630
H8	S2	H9	108.467	H10	S3	H11	108.467

All results from a given calculation for Si₃H₈ (trisilane)

using model chemistry: B2PLYP/cc-pCVTZ

States and conformations

	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

Number	Element	Mulliken
1	Si	0.046
2	Si	0.094
3	Si	0.094
4	H	-0.029
5	H	-0.029
6	H	-0.028
7	H	-0.028
8	H	-0.030
9	H	-0.030
10	H	-0.030
11	H	-0.030

<r²>	208.589
(<r²>)^1/2	14.443

All results from a given calculation for Si3H8 (trisilane)

using model chemistry: B2PLYP/cc-pCVTZ

States and conformations

All results from a given calculation for Si₃H₈ (trisilane)