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III.B.1. (XIII.B.1.)

Calculated Frequencies for C2H4N2S2 (Ethanedithioamide) 1A C1


Click on an entry for details.
For a comparison of experimental versus calculated see section IV.C.1 Compare vibrational frequencies
Methods with predefined basis sets
semi-empirical PM3 freq
PM6 freq
composite G4 freq
molecular mechanics DREIDING freq

Methods with standard basis sets
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) 6-311+G(3df,2p) TZVP cc-pVDZ cc-pVTZ aug-cc-pVDZ aug-cc-pVTZ
hartree fock HF freq freq freq freq freq freq freq freq freq freq freq freq freq freq freq freq
density functional LSDA freq freq freq freq freq freq freq freq freq freq     freq freq freq  
SVWN   freq     freq   freq                  
BLYP freq freq   freq freq freq freq   freq freq     freq freq freq  
B1B95 freq freq freq freq freq freq freq freq freq freq     freq freq freq  
B3LYP freq freq freq freq freq freq freq freq freq freq freq freq freq freq freq  
B3LYPultrafine         freq                     freq
B3PW91 freq freq freq freq freq freq freq freq freq freq     freq freq freq  
mPW1PW91 freq freq freq freq freq freq freq freq freq freq     freq freq freq  
M06-2X         freq                      
PBEPBE freq freq freq freq freq freq freq freq freq freq freq   freq freq freq  
PBEPBEultrafine         freq                      
PBE1PBE         freq                      
HSEh1PBE         freq                      
TPSSh         freq   freq             freq    
Moller Plesset perturbation MP2 freq freq freq freq freq freq freq freq freq freq   freq freq      
MP2=FULL         freq     freq freq              
MP3         freq                      
MP3=FULL         freq   freq                  
B2PLYP         freq                 freq    
B2PLYP=FULLultrafine         freq                      

Methods with effective core potentials (select basis sets)
CEP-31G CEP-31G* CEP-121G CEP-121G* LANL2DZ SDD
hartree fock HF freq freq freq freq freq freq
density functional B1B95 freq freq        
B3LYP freq freq freq freq freq freq
Moller Plesset perturbation MP2 freq freq freq freq freq freq
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.
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