CCCBDB Ionization Energy page 2

Methods with effective core potentials (select basis sets)
		CEP-31G	CEP-31G*	CEP-121G	CEP-121G*	LANL2DZ	SDD	cc-pVTZ-PP	aug-cc-pVTZ-PP	Def2TZVPP
hartree fock	HF	6.770	6.769	6.632	6.626	6.808	5.353			6.611
density functional	LSDA	8.005	8.005	7.871	7.872	8.044	8.175
BLYP	7.503	7.503	7.365	7.361	7.544	7.653
B1B95	7.468	7.468	7.327	7.327	7.504	7.465
B3LYP	7.649	7.649	7.511	7.507	7.691	7.751			7.743
B3LYPultrafine	7.649	7.649	7.511	7.507	7.691	7.751
B3PW91	7.665	7.667	7.521	7.522	7.712	7.569
mPW1PW91	7.596	7.598	7.453	7.454	7.641	7.550
M06-2X	7.733	7.737	7.634	6.870	7.762	7.784
PBEPBE	7.548	7.551	7.407	7.408	7.593	7.644			7.633
PBEPBEultrafine	7.548	7.551	7.407	7.408	7.593	7.644
PBE1PBE	7.555	7.557	7.413	7.413	7.600	7.571
HSEh1PBE	7.546	7.548	7.404	7.404	7.591	7.571
Moller Plesset perturbation	MP2	7.238	7.336	7.118	7.214	7.301	7.108			7.202
MP2=FULL	7.238	7.336	7.118	7.214	7.301	7.112
ROMP2	6.770		6.632		6.808	6.615
MP3	7.466	7.530	7.349	7.411	7.537	7.338
MP4	7.569	7.603	7.452	7.483	7.643	7.439
MP4=FULL	7.569	7.603	7.452	7.483	7.643	7.440
Configuration interaction	CID	7.623	7.646	7.503	7.524	7.698	7.491
CISD	7.625	7.651	7.507	7.530	7.700	7.495
Quadratic configuration interaction	QCISD	7.625	7.651	7.507	7.530	7.700	7.495
QCISD(T)	7.625	7.651	7.507	7.530	7.700	7.495
Coupled Cluster	CCD	7.623	7.646	7.503	7.524	7.698	7.491
CCSD	7.625	7.651	7.507	7.530	7.700	7.495
CCSD=FULL	7.625	7.651	7.507	7.530	7.700	7.493
CCSD(T)	7.625	7.651	7.507	7.530	7.700	7.495
CCSD(T)=FULL	7.625	7.651	7.507	7.530	7.700	7.495

Methods with effective core potentials (select basis sets)

CEP-31G

CEP-31G*

CEP-121G

CEP-121G*

LANL2DZ

SDD

cc-pVTZ-PP

aug-cc-pVTZ-PP

Def2TZVPP

hartree fock

density functional

LSDA

BLYP

B1B95

B3LYP

B3LYPultrafine

B3PW91

mPW1PW91

M06-2X

PBEPBE

PBEPBEultrafine

PBE1PBE

HSEh1PBE

Moller Plesset perturbation

MP2

MP2=FULL

ROMP2

MP3

MP4

MP4=FULL

Configuration interaction

CID

CISD

Quadratic configuration interaction

QCISD

QCISD(T)

Coupled Cluster

CCD

CCSD

CCSD=FULL

CCSD(T)

CCSD(T)=FULL

	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: Home > Ions > Energy > Calculated Ionization Energy OR Calculated > Energy > Ion > Calculated Ionization Energy

Calculated Ionization Energy for Mg (Magnesium atom)