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Calculated Electron Affininty for I (Iodine atom)

Experimental Electron Affinity is 3.059036 ± 0.000044 eV
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Electron Affinities in eV
Methods with predefined basis sets
semi-empirical PM3  

Electron Affinities in eV
Methods with standard basis sets
3-21G 3-21G* 6-31G* 6-311G* Def2TZVPP
hartree fock HF         2.234
density functional B3LYP         3.215
M06-2X   2.696      
PBEPBE         3.144
wB97X-D   2.755      
B97D3 2.635        
3-21G 3-21G* 6-31G* 6-311G* Def2TZVPP
Moller Plesset perturbation MP2     2.948 2.948 3.138
3-21G 3-21G* 6-31G* 6-311G* Def2TZVPP
For descriptions of the methods (AM1, HF, MP2, ...) and basis sets (3-21G, 3-21G*, 6-31G, ...) see the glossary in section I.C. Predefined means the basis set used is determined by the method.