CCCBDB calculation results Page

State	Conformation	minimum conformation	conformer description	state description
1	1	yes	D2D	¹A₁

Energy calculated at TPSSh/6-31G(2df,p)

	hartrees
Energy at 0K	-347.745830
Energy at 298.15K	-347.753690
HF Energy	-347.745830
Nuclear repulsion energy	396.111029

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 TPSSh/6-31G(2df,p)

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁	3241	3127	0.00
2	A₁	3210	3098	0.00
3	A₁	1570	1515	0.00
4	A₁	1391	1342	0.00
5	A₁	1110	1071	0.00
6	A₁	1009	973	0.00
7	A₁	860	830	0.00
8	A₁	435	420	0.00
9	A₂	943	910	0.00
10	A₂	727	702	0.00
11	A₂	519	501	0.00
12	B₁	951	918	0.00
13	B₁	781	753	0.00
14	B₁	617	595	0.00
15	B₁	212	204	0.00
16	B₂	3238	3125	16.07
17	B₂	3209	3097	25.05
18	B₂	1548	1494	9.73
19	B₂	1391	1343	1.33
20	B₂	1195	1153	6.19
21	B₂	1054	1017	10.95
22	B₂	989	954	18.60
23	B₂	818	789	8.03
24	E	3234	3121	16.47
24	E	3234	3121	16.47
25	E	3197	3085	6.70
25	E	3197	3085	6.70
26	E	1633	1576	0.02
26	E	1633	1576	0.02
27	E	1296	1251	0.85
27	E	1296	1251	0.85
28	E	1146	1105	0.02
28	E	1146	1105	0.02
29	E	1079	1041	9.53
29	E	1079	1041	9.53
30	E	950	917	0.00
30	E	950	917	0.00
31	E	804	776	1.97
31	E	804	776	1.97
32	E	772	745	58.61
32	E	772	745	58.61
33	E	511	493	1.05
33	E	511	493	1.05
34	E	106	102	0.64
34	E	106	102	0.64

Unscaled Zero Point Vibrational Energy (zpe) 30235.2 cm^-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 29177.0 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 TPSSh/6-31G(2df,p)

A	B	C
0.14095	0.04409	0.04409

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

Geometric Data calculated at TPSSh/6-31G(2df,p)

Point Group is D_2d

Cartesians (Å)

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.000
C2	0.000	1.178	0.960
C3	0.000	-1.178	0.960
C4	1.178	0.000	-0.960
C5	-1.178	0.000	-0.960
C6	0.000	0.738	2.230
C7	0.000	-0.738	2.230
C8	0.738	0.000	-2.230
C9	-0.738	0.000	-2.230
H10	0.000	2.204	0.614
H11	0.000	-2.204	0.614
H12	2.204	0.000	-0.614
H13	-2.204	0.000	-0.614
H14	0.000	1.350	3.125
H15	0.000	-1.350	3.125
H16	1.350	0.000	-3.125
H17	-1.350	0.000	-3.125

Atom - Atom Distances (Å)

	C1	C2	C3	C4	C5	C6	C7	C8	C9	H10	H11	H12	H13	H14	H15	H16	H17
C1		1.5200	1.5200	1.5200	1.5200	2.3493	2.3493	2.3493	2.3493	2.2876	2.2876	2.2876	2.2876	3.4040	3.4040	3.4040	3.4040
C2	1.5200		2.3564	2.5427	2.5427	1.3444	2.2985	3.4805	3.4805	1.0824	3.3995	2.9534	2.9534	2.1712	3.3283	4.4609	4.4609
C3	1.5200	2.3564		2.5427	2.5427	2.2985	1.3444	3.4805	3.4805	3.3995	1.0824	2.9534	2.9534	3.3283	2.1712	4.4609	4.4609
C4	1.5200	2.5427	2.5427		2.3564	3.4805	3.4805	1.3444	2.2985	2.9534	2.9534	1.0824	3.3995	4.4609	4.4609	2.1712	3.3283
C5	1.5200	2.5427	2.5427	2.3564		3.4805	3.4805	2.2985	1.3444	2.9534	2.9534	3.3995	1.0824	4.4609	4.4609	3.3283	2.1712
C6	2.3493	1.3444	2.2985	3.4805	3.4805		1.4751	4.5813	4.5813	2.1823	3.3561	3.6730	3.6730	1.0840	2.2713	5.5718	5.5718
C7	2.3493	2.2985	1.3444	3.4805	3.4805	1.4751		4.5813	4.5813	3.3561	2.1823	3.6730	3.6730	2.2713	1.0840	5.5718	5.5718
C8	2.3493	3.4805	3.4805	1.3444	2.2985	4.5813	4.5813		1.4751	3.6730	3.6730	2.1823	3.3561	5.5718	5.5718	1.0840	2.2713
C9	2.3493	3.4805	3.4805	2.2985	1.3444	4.5813	4.5813	1.4751		3.6730	3.6730	3.3561	2.1823	5.5718	5.5718	2.2713	1.0840
H10	2.2876	1.0824	3.3995	2.9534	2.9534	2.1823	3.3561	3.6730	3.6730		4.4073	3.3497	3.3497	2.6518	4.3513	4.5451	4.5451
H11	2.2876	3.3995	1.0824	2.9534	2.9534	3.3561	2.1823	3.6730	3.6730	4.4073		3.3497	3.3497	4.3513	2.6518	4.5451	4.5451
H12	2.2876	2.9534	2.9534	1.0824	3.3995	3.6730	3.6730	2.1823	3.3561	3.3497	3.3497		4.4073	4.5451	4.5451	2.6518	4.3513
H13	2.2876	2.9534	2.9534	3.3995	1.0824	3.6730	3.6730	3.3561	2.1823	3.3497	3.3497	4.4073		4.5451	4.5451	4.3513	2.6518
H14	3.4040	2.1712	3.3283	4.4609	4.4609	1.0840	2.2713	5.5718	5.5718	2.6518	4.3513	4.5451	4.5451		2.7005	6.5347	6.5347
H15	3.4040	3.3283	2.1712	4.4609	4.4609	2.2713	1.0840	5.5718	5.5718	4.3513	2.6518	4.5451	4.5451	2.7005		6.5347	6.5347
H16	3.4040	4.4609	4.4609	2.1712	3.3283	5.5718	5.5718	1.0840	2.2713	4.5451	4.5451	2.6518	4.3513	6.5347	6.5347		2.7005
H17	3.4040	4.4609	4.4609	3.3283	2.1712	5.5718	5.5718	2.2713	1.0840	4.5451	4.5451	4.3513	2.6518	6.5347	6.5347	2.7005

picture of spiro[4.4]nona-1,3,6,8-tetraene state 1 conformation 1

More geometry information
Calculated Bond Angles

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C2	C6	110.052	C1	C2	H10	122.155
C1	C3	C7	110.052	C1	C3	H11	122.155
C1	C4	C8	110.052	C1	C4	H12	122.155
C1	C5	C9	110.052	C1	C5	H13	122.155
C2	C1	C3	101.631	C2	C1	C4	113.528
C2	C1	C5	113.528	C2	C6	C7	109.132
C2	C6	H14	126.450	C3	C1	C4	113.528
C3	C1	C5	113.528	C3	C7	C6	109.132
C3	C7	H15	126.450	C4	C1	C5	101.631
C4	C8	C9	109.132	C4	C8	H16	126.450
C5	C9	C8	109.132	C5	C9	H17	126.450
C6	C2	H10	127.793	C6	C7	H15	124.418
C7	C3	H11	127.793	C7	C6	H14	124.418
C8	C4	H12	127.793	C8	C9	H17	124.418
C9	C5	H13	127.793	C9	C8	H16	124.418

Electronic energy levels

Charges, Dipole, Quadrupole and Polarizability

All results from a given calculation for C₉H₈ (spiro[4.4]nona-1,3,6,8-tetraene)

using model chemistry: TPSSh/6-31G(2df,p)

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

All results from a given calculation for C9H8 (spiro[4.4]nona-1,3,6,8-tetraene)

using model chemistry: TPSSh/6-31G(2df,p)

States and conformations

All results from a given calculation for C₉H₈ (spiro[4.4]nona-1,3,6,8-tetraene)