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Calculated Frequencies for C6H12O2 (Hexanoic acid) 1A1 Cs

19 07 18 15 43
InChI=1S/C6H12O2/c1-2-3-4-5-6(7)8/h2-5H2,1H3,(H,7,8) INChIKey=FUZZWVXGSFPDMH-UHFFFAOYSA-N


Click on an entry for details. A subscript indicates the number of imaginary frequencies.
An R subscript indicates raman activity data is available.
For a comparison of experimental versus calculated see section IV.C.1 Compare vibrational frequencies
Methods with predefined basis sets
semi-empirical AM1 freq1
PM6 freq1
composite G2 freq
G3 freq
G4 freq
CBS-Q 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 cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ daug-cc-pVTZ
hartree fock HF freq freq freq freq freq freq freq freq freq freq   freq freq freq freq freq freq dnf
ROHF dnf freq freq freq freq freq freq freq   freq     freq freq   freq freq  
density functional BLYP freq1 freq freq freq freq freq freq freq freq freq     freq freq        
B1B95 freq freq freq freq freq freq     freq freq         freq freq freq  
B3LYP freq1 freq freq freq freq     freq freq freq   freq     freq freq freq  
B3LYPultrafine                                 freq  
B3PW91 freq freq freq freq freq freq freq freq freq freq     freq freq        
mPW1PW91 freq1 freq freq freq freq freq freq freq freq freq     freq freq        
M06-2X     freq                              
PBEPBE freq1 dnf freq freq dnf freq freq freq freq       freq freq freq      
PBE1PBE         freq                          
TPSSh         freq   freq     freq       freq        
wB97X-D     freq1   freq1   freq1   freq1     freq1 freq1 freq1     freq1  
B97D3   freq     freq   freq   freq   freq freq   freq     freq  
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 cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ daug-cc-pVTZ
Moller Plesset perturbation MP2 freq freq dnf dnf freq freq freq freq freq     freq1 freq     dnf    
MP2=FULL freq freq freq freq freq freq freq freq freq freq     freq          
MP3         freq                          
MP3=FULL         freq   freq                      
B2PLYP                           freq        
Configuration interaction CID   freq freq freq freq     freq                    
CISD   freq freq freq freq     freq                    
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 cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ daug-cc-pVTZ
Quadratic configuration interaction QCISD   dnf dnf dnf freq dnf   dnf   dnf     dnf          
Coupled Cluster CCD   dnf dnf dnf                            
CCSD         freq                          
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 cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ daug-cc-pVTZ

Methods with effective core potentials (select basis sets)
CEP-31G CEP-31G* CEP-121G CEP-121G* LANL2DZ SDD cc-pVTZ-PP aug-cc-pVTZ-PP Def2TZVPP
hartree fock HF freq freq freq freq freq freq     freq
density functional B3LYP freq freq freq freq freq freq     freq
PBEPBE                 freq
Moller Plesset perturbation MP2 freq 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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