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	-70.132394
Energy at 298.15K	-70.140287
HF Energy	-70.132394
Nuclear repulsion energy	202.179153

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3648	3555	65.37
2	A'	3249	3166	1.20
3	A'	3207	3125	14.61
4	A'	3185	3103	13.18
5	A'	1603	1562	60.09
6	A'	1566	1526	51.35
7	A'	1470	1433	35.56
8	A'	1447	1410	3.41
9	A'	1404	1368	29.67
10	A'	1390	1355	21.81
11	A'	1336	1302	37.15
12	A'	1289	1256	36.63
13	A'	1256	1224	17.39
14	A'	1233	1201	59.36
15	A'	1167	1137	3.28
16	A'	1084	1056	10.22
17	A'	1074	1047	17.24
18	A'	926	902	0.25
19	A'	879	857	13.22
20	A'	774	754	10.77
21	A'	647	631	0.21
22	A'	558	543	2.88
23	A'	432	421	15.38
24	A"	982	957	0.38
25	A"	932	908	23.73
26	A"	878	855	8.44
27	A"	812	791	11.86
28	A"	655	638	0.19
29	A"	636	620	162.01
30	A"	612	596	3.31
31	A"	429	418	0.77
32	A"	249	243	2.47
33	A"	232	226	2.91

Atom	x (Å)	y (Å)
N1	-1.842	-1.287
C2	-2.162	0.056
N3	-1.304	1.105
C4	0.000	0.717
C5	0.463	-0.636
C6	-0.536	-1.642
N7	1.874	-0.689
C8	2.230	0.597
N9	1.146	1.501
H10	-3.220	0.289
H11	-0.298	-2.702
H12	3.256	0.934
H13	1.178	2.511

	N1	C2	N3	C4	C5	C6	N7	C8	N9	H10	H11	H12	H13
N1		1.3804	2.4511	2.7220	2.3954	1.3538	3.7641	4.4874	4.0863	2.0932	2.0947	5.5614	4.8525
C2	1.3804		1.3546	2.2606	2.7146	2.3509	4.1040	4.4254	3.6092	1.0837	3.3288	5.4889	4.1451
N3	2.4511	1.3546		1.3604	2.4803	2.8517	3.6490	3.5705	2.4816	2.0826	3.9372	4.5636	2.8529
C4	2.7220	2.2606	1.3604		1.4301	2.4190	2.3426	2.2335	1.3880	3.2486	3.4320	3.2636	2.1463
C5	2.3954	2.7146	2.4803	1.4301		1.4175	1.4120	2.1552	2.2430	3.7976	2.2016	3.2045	3.2274
C6	1.3538	2.3509	2.8517	2.4190	1.4175		2.5915	3.5590	3.5640	3.3066	1.0865	4.5845	4.4927
N7	3.7641	4.1040	3.6490	2.3426	1.4120	2.5915		1.3346	2.3071	5.1872	2.9615	2.1319	3.2747
C8	4.4874	4.4254	3.5705	2.2335	2.1552	3.5590	1.3346		1.4113	5.4593	4.1567	1.0799	2.1840
N9	4.0863	3.6092	2.4816	1.3880	2.2430	3.5640	2.3071	1.4113		4.5310	4.4436	2.1853	1.0112
H10	2.0932	1.0837	2.0826	3.2486	3.7976	3.3066	5.1872	5.4593	4.5310		4.1815	6.5087	4.9277
H11	2.0947	3.3288	3.9372	3.4320	2.2016	1.0865	2.9615	4.1567	4.4436	4.1815		5.0848	5.4181
H12	5.5614	5.4889	4.5636	3.2636	3.2045	4.5845	2.1319	1.0799	2.1853	6.5087	5.0848		2.6090
H13	4.8525	4.1451	2.8529	2.1463	3.2274	4.4927	3.2747	2.1840	1.0112	4.9277	5.4181	2.6090

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
N1	C2	N3	127.326	N1	C2	H10	115.792
N1	C6	C5	119.601	N1	C6	H11	117.852
C2	N1	C6	118.588	C2	N3	C4	112.741
N3	C2	H10	116.882	N3	C4	C5	125.437
N3	C4	N9	129.087	C4	C5	C6	116.307
C4	C5	N7	111.024	C4	N9	C8	105.853
C4	N9	H13	126.188	C5	C4	N9	105.476
C5	C6	H11	122.548	C5	N7	C8	103.352
C6	C5	N7	132.668	N7	C8	N9	114.296
N7	C8	H12	123.659	C8	N9	H13	127.959
N9	C8	H12	122.045

All results from a given calculation for C₅H₄N₄ (purine)

using model chemistry: B3LYP/CEP-121G

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	0.126
2	C	-0.307
3	N	0.250
4	C	-0.386
5	C	-0.061
6	C	-0.353
7	N	0.167
8	C	-0.163
9	N	-0.174
10	H	0.180
11	H	0.170
12	H	0.206
13	H	0.346

	x	y	z	Total
	2.332	3.147	0.000	3.917
CHELPG
AIM
ESP

	x	y	z
x	15.722	1.446	0.000
y	1.446	12.284	0.000
z	0.000	0.000	5.500

<r²>	203.924
(<r²>)^1/2	14.280

All results from a given calculation for C5H4N4 (purine)

using model chemistry: B3LYP/CEP-121G

States and conformations

All results from a given calculation for C₅H₄N₄ (purine)