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Calculated Proton Affinity

15 11 04 06 09
Name Species   Species Name
2H-pyrrole C4H5N C4H6N+ pyrrole, protonated

Bonding changes

Bond type C-C changed by -1
Bond type C=C changed by +1
Bond type C-N changed by +1
Bond type H-C changed by -1
Bond type C=N lost 1
Bond type H-N gained 2
Proton Affinities (kJ/mol)
Proton Affinities in kJ/mol
Methods with predefined basis sets
composite G3B3 812

Proton Affinities in kJ/mol
Methods with standard basis sets
3-21G* 6-31G* 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) TZVP cc-pVDZ cc-pVTZ aug-cc-pVTZ
hartree fock HF   856                
density functional BLYP   845                
B3LYP           866       850
M06-2X -2174                  
TPSSh   848 848     866     856  
wB97X-D 901 856 856   862   859 858 863 860
3-21G* 6-31G* 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) TZVP cc-pVDZ cc-pVTZ aug-cc-pVTZ
Moller Plesset perturbation MP2   837   830            
MP3     672              
MP3=FULL   855                
3-21G* 6-31G* 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) TZVP cc-pVDZ cc-pVTZ aug-cc-pVTZ
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.