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Calculated Proton Affinity

15 11 04 06 09
Name Species   Species Name
3H-pyrrole C4H5N C4H6N+ pyrrole, alpha-protonated

Bonding changes

Bond type H-N gained 1
Proton Affinities (kJ/mol)
Proton Affinities in kJ/mol
Methods with predefined basis sets
composite G3B3 895

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   965                
density functional BLYP   952                
B3LYP                   944
M06-2X -2099                  
TPSSh   958 951     968     955  
wB97X-D 983 958 951   955   953 955 956 953
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   931   918            
MP3     755              
MP3=FULL   941                
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.