CCCBDB calculation results Page

using model chemistry: PBE1PBE/6-31+G**

States and conformations

State	Conformation	minimum conformation	conformer description	state description
1	2	yes	C2V	²B₁

State

Conformation

minimum conformation

conformer description

state description

yes

C2V

²B₁

Conformer 1 (D5H)

Jump to S1C2

Vibrational Frequencies calculated at PBE1PBE/6-31+G**

Rotational Constants (cm^-1) from geometry optimized at PBE1PBE/6-31+G**
See section I.F.4 to change rotational constant units

Geometric Data calculated at PBE1PBE/6-31+G**

Electronic energy levels

Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1

Energy calculated at PBE1PBE/6-31+G**

	hartrees
Energy at 0K	-193.242097
Energy at 298.15K
HF Energy	-193.242097
Nuclear repulsion energy	148.816330

The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.

Vibrational Frequencies calculated at PBE1PBE/6-31+G**

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁	3287	3140	0.05
2	A₁	3280	3133	5.69
3	A₁	3246	3101	0.98
4	A₁	1599	1527	0.15
5	A₁	1478	1412	2.89
6	A₁	1153	1102	0.02
7	A₁	1093	1044	11.06
8	A₁	1054	1007	14.03
9	A₁	840	803	0.28
10	A₂	912	871	0.00
11	A₂	824	787	0.00
12	A₂	522	499	0.00
13	B₁	886	846	7.92
14	B₁	726	694	0.72
15	B₁	684	653	132.53
16	B₁	486	464	11.93
17	B₂	3263	3117	11.96
18	B₂	3248	3102	7.14
19	B₂	1411	1348	43.99
20	B₂	1298	1240	0.00
21	B₂	1225	1170	1.71
22	B₂	981	937	0.00
23	B₂	929	887	3.49
24	B₂	43i	41i	4.23

Unscaled Zero Point Vibrational Energy (zpe) 17190.0 cm^-1
Scaled (by 0.9553) Zero Point Vibrational Energy (zpe) 16421.6 cm^-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.

Rotational Constants (cm^-1) from geometry optimized at PBE1PBE/6-31+G**

A	B	C
0.31028	0.28442	0.14839

See section I.F.4 to change rotational constant units

Geometric Data calculated at PBE1PBE/6-31+G**

Point Group is C_2v

Cartesians (Å)

Atom	y (Å)	z (Å)
C1	0.000	1.224
C2	1.123	0.392
C3	0.680	-1.004
C4	-0.680	-1.004
C5	-1.123	0.392
H6	0.000	2.306
H7	2.158	0.715
H8	1.335	-1.866
H9	-1.335	-1.866
H10	-2.158	0.715

Atom - Atom Distances (Å)

	C1	C2	C3	C4	C5	H6	H7	H8	H9	H10
C1		1.3977	2.3294	2.3294	1.3977	1.0817	2.2177	3.3661	3.3661	2.2177
C2	1.3977		1.4648	2.2799	2.2460	2.2189	1.0847	2.2681	3.3375	3.2973
C3	2.3294	1.4648		1.3591	2.2799	3.3788	2.2677	1.0828	2.1909	3.3180
C4	2.3294	2.2799	1.3591		1.4648	3.3788	3.3180	2.1909	1.0828	2.2677
C5	1.3977	2.2460	2.2799	1.4648		2.2189	3.2973	3.3375	2.2681	1.0847
H6	1.0817	2.2189	3.3788	3.3788	2.2189		2.6813	4.3802	4.3802	2.6813
H7	2.2177	1.0847	2.2677	3.3180	3.2973	2.6813		2.7095	4.3432	4.3169
H8	3.3661	2.2681	1.0828	2.1909	3.3375	4.3802	2.7095		2.6692	4.3432
H9	3.3661	3.3375	2.1909	1.0828	2.2681	4.3802	4.3432	2.6692		2.7095
H10	2.2177	3.2973	3.3180	2.2677	1.0847	2.6813	4.3169	4.3432	2.7095

picture of cyclopentadienyl radical state 1 conformation 2

More geometry information
Calculated Bond Angles

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C2	C3	108.913	C1	C2	H7	126.140
C1	C5	C4	108.913	C1	C5	H10	126.140
C2	C1	C5	106.929	C2	C1	H6	126.536
C2	C3	C4	107.623	C2	C3	H8	125.151
C3	C2	H7	124.947	C3	C4	C5	107.623
C3	C4	H9	127.226	C4	C3	H8	127.226
C4	C5	H10	124.947	C5	C1	H6	126.536
C5	C4	H9	125.151

Electronic energy levels

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31+G** Charges (e)

Number	Element	Mulliken
1	C	-0.251
2	C	-0.092
3	C	-0.191
4	C	-0.191
5	C	-0.092
6	H	0.161
7	H	0.165
8	H	0.163
9	H	0.163
10	H	0.165

Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)

	x	y	z	Total
	0.000	0.000	0.036	0.036
CHELPG
AIM
ESP

Electric Quadrupole moment
Quadrupole components in D Å

Primitive
	x	y	z
x	-33.780	0.000	0.000
y	0.000	-25.558	0.000
z	0.000	0.000	-27.732

Traceless
	x	y	z
x	-7.136	0.000	0.000
y	0.000	5.198	0.000
z	0.000	0.000	1.937

Polar
3z²-r²	3.874
x²-y²	-8.223
xy	0.000
xz	0.000
yz	0.000

Polarizabilities
Components of the polarizability tensor.
Units are Å³ (Angstrom cubed)
Change units.

	x	y	z
x	5.194	0.000	0.000
y	0.000	9.628	0.000
z	0.000	0.000	8.811

<r²> (average value of r²) Å²

<r²>	87.917
(<r²>)^1/2	9.376

	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

All results from a given calculation for C5H5 (cyclopentadienyl radical)

using model chemistry: PBE1PBE/6-31+G**

States and conformations

Conformer 1 (D5H)

Conformer 2 (C2V)

All results from a given calculation for C₅H₅ (cyclopentadienyl radical)