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	-409.609272
Energy at 298.15K	-409.617623
HF Energy	-409.609272
Nuclear repulsion energy	417.691156

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3897	3547	121.49
2	A'	3387	3083	2.38
3	A'	3343	3042	19.32
4	A'	3333	3033	17.60
5	A'	1817	1654	120.05
6	A'	1786	1626	165.22
7	A'	1703	1550	39.33
8	A'	1617	1471	11.48
9	A'	1548	1409	29.67
10	A'	1547	1408	105.87
11	A'	1485	1352	71.00
12	A'	1419	1292	31.34
13	A'	1398	1272	8.20
14	A'	1304	1187	5.41
15	A'	1254	1142	43.69
16	A'	1219	1109	14.63
17	A'	1156	1052	28.84
18	A'	1017	925	1.50
19	A'	983	895	19.34
20	A'	867	789	22.90
21	A'	711	647	0.10
22	A'	614	558	3.08
23	A'	481	438	12.53
24	A"	1138	1036	0.30
25	A"	1078	981	5.36
26	A"	1035	942	3.69
27	A"	904	823	14.95
28	A"	722	657	16.74
29	A"	672	611	16.82
30	A"	544	495	97.55
31	A"	463	422	18.95
32	A"	276	251	0.17
33	A"	253	231	7.54

Atom	x (Å)	y (Å)
N1	-1.801	-1.242
C2	-2.094	0.066
N3	-1.266	1.081
C4	0.000	0.693
C5	0.442	-0.617
C6	-0.538	-1.595
N7	1.823	-0.670
C8	2.177	0.565
N9	1.125	1.452
H10	-3.143	0.302
H11	-0.317	-2.649
H12	3.200	0.888
H13	1.171	2.441

	N1	C2	N3	C4	C5	C6	N7	C8	N9	H10	H11	H12	H13
N1		1.3401	2.3834	2.6433	2.3280	1.3109	3.6687	4.3693	3.9772	2.0461	2.0446	5.4352	4.7325
C2	1.3401		1.3101	2.1863	2.6267	2.2759	3.9859	4.3009	3.5052	1.0751	3.2446	5.3577	4.0381
N3	2.3834	1.3101		1.3243	2.4089	2.7734	3.5510	3.4821	2.4199	2.0318	3.8489	4.4703	2.7913
C4	2.6433	2.1863	1.3243		1.3832	2.3510	2.2763	2.1812	1.3571	3.1672	3.3576	3.2058	2.1041
C5	2.3280	2.6267	2.4089	1.3832		1.3847	1.3822	2.1001	2.1796	3.7011	2.1692	3.1420	3.1445
C6	1.3109	2.2759	2.7734	2.3510	1.3847		2.5364	3.4704	3.4720	3.2226	1.0768	4.4878	4.3837
N7	3.6687	3.9859	3.5510	2.2763	1.3822	2.5364		1.2848	2.2341	5.0604	2.9158	2.0788	3.1787
C8	4.3693	4.3009	3.4821	2.1812	2.1001	3.4704	1.2848		1.3766	5.3269	4.0693	1.0721	2.1290
N9	3.9772	3.5052	2.4199	1.3571	2.1796	3.4720	2.2341	1.3766		4.4201	4.3480	2.1504	0.9900
H10	2.0461	1.0751	2.0318	3.1672	3.7011	3.2226	5.0604	5.3269	4.4201		4.0859	6.3698	4.8152
H11	2.0446	3.2446	3.8489	3.3576	2.1692	1.0768	2.9158	4.0693	4.3480	4.0859		4.9885	5.3038
H12	5.4352	5.3577	4.4703	3.2058	3.1420	4.4878	2.0788	1.0721	2.1504	6.3698	4.9885		2.5553
H13	4.7325	4.0381	2.7913	2.1041	3.1445	4.3837	3.1787	2.1290	0.9900	4.8152	5.3038	2.5553

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
N1	C2	N3	128.142	N1	C2	H10	115.376
N1	C6	C5	119.430	N1	C6	H11	117.467
C2	N1	C6	118.300	C2	N3	C4	112.181
N3	C2	H10	116.482	N3	C4	C5	125.655
N3	C4	N9	128.965	C4	C5	C6	116.293
C4	C5	N7	110.803	C4	N9	C8	105.857
C4	N9	H13	126.685	C5	C4	N9	105.381
C5	C6	H11	123.103	C5	N7	C8	103.839
C6	C5	N7	132.905	N7	C8	N9	114.121
N7	C8	H12	123.521	C8	N9	H13	127.457
N9	C8	H12	122.358

All results from a given calculation for C₅H₄N₄ (purine)

using model chemistry: HF/cc-pVTZ

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	N	-0.249
2	C	0.064
3	N	-0.256
4	C	0.139
5	C	0.063
6	C	-0.114
7	N	-0.257
8	C	0.025
9	N	-0.125
10	H	0.156
11	H	0.178
12	H	0.176
13	H	0.198

	x	y	z	Total
	2.240	2.874	0.000	3.644
CHELPG
AIM
ESP

	x	y	z
x	14.187	1.368	0.000
y	1.368	11.629	0.000
z	0.000	0.000	5.824

<r²>	249.061
(<r²>)^1/2	15.782

All results from a given calculation for C5H4N4 (purine)

using model chemistry: HF/cc-pVTZ

States and conformations

All results from a given calculation for C₅H₄N₄ (purine)