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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 598

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) 6-311+G(3df,2p) TZVP Def2TZVPP cc-pVDZ cc-pVTZ aug-cc-pVTZ
hartree fock HF   856             867      
density functional BLYP   845                    
B3LYP           866     851     850
M06-2X 889                      
PBEPBE                 843      
TPSSh   848 848     866         856  
wB97X-D 901 856 856   862     859   858 863 860
B97D3             861          
3-21G* 6-31G* 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) 6-311+G(3df,2p) TZVP Def2TZVPP cc-pVDZ cc-pVTZ aug-cc-pVTZ
Moller Plesset perturbation MP2   837   830         841      
MP3     672                  
MP3=FULL   855                    
3-21G* 6-31G* 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) 6-311+G(3df,2p) TZVP Def2TZVPP 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.