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Calculated Frequencies for C4H8O2 (Ethyl acetate) 1A' Cs

19 07 18 15 43
InChI=1S/C4H8O2/c1-3-6-4(2)5/h3H2,1-2H3 INChIKey=XEKOWRVHYACXOJ-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 freq1R
PM3 freqR
PM6 freq2
composite G2 freqR
G3 freqR
G3B3 freq
G4 freq
CBS-Q freqR

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 aug-cc-pVQZ daug-cc-pVDZ daug-cc-pVTZ
hartree fock HF freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR
density functional LSDA freq1 freq1 freq1 freq freq freq freq1 freq1 freq1 freq   freq1 freq1 freq   freq1 freq      
BLYP freqR freq1R freq1R freqR freqR freqR freq1R freq1R freqR freqR freqR freq1R freqR freqR   freqR freqR   freq1R freqR
B1B95 freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR   freqR freqR   freqR  
B3LYP freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR
B3LYPultrafine   freqR     freqR freqR freqR freqR   freqR freqR freqR freqR freqR   freqR freqR   freqR freqR
B3PW91 freqR freq freq freq freq freq freq freq freqR freqR freqR freqR freq freq   freqR freqR   freqR freqR
mPW1PW91 freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR   freqR freqR   freqR freqR
M06-2X freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR   freqR freqR   freqR freqR
PBEPBE freq1R freq1R freq1R freqR freqR freqR freq1R freq1R freq1R freqR freq1R freq1R freqR freqR   freq1R freq1R   freq1R freq1R
PBEPBEultrafine   freq1R     freqR freqR freq1R freq1R   freqR freq1R freq1R freqR freqR   freq1R freq1R   freq1R freq1R
PBE1PBE freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR   freqR freqR   freqR freqR
HSEh1PBE freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR   freqR freqR   freqR freqR
TPSSh freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR
wB97X-D freqR freqR freqR freqR freqR freqR freqR freq1R freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR
B97D3 freqR freqR freqR freqR freqR freqR freq1R freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR
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 aug-cc-pVQZ daug-cc-pVDZ daug-cc-pVTZ
Moller Plesset perturbation MP2 freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freq1R freqR freqR   freqR freqR   freqR freqR
MP2=FULL freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freq1R freqR freqR   freqR freqR   freqR  
MP3         freq   freq         freq freq freq            
MP3=FULL         freq   freq         freq freq              
MP4   freq     freq       freq1     freq1 freq     freq1 dnf      
MP4=FULL   freq     freq               freq dnf            
B2PLYP freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR   freqR freqR      
B2PLYP=FULL freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR   freqR     freqR freqR
B2PLYP=FULLultrafine freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR freqR   freqR freqR   freqR  
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 aug-cc-pVQZ daug-cc-pVDZ daug-cc-pVTZ
Quadratic configuration interaction QCISD   freq freq freq freq freq freq freq freq freq   freq freq     freq        
QCISD(T)         freq             freq1 freq dnf            
QCISD(T)=FULL         freq   freq             dnf   dnf dnf      
Coupled Cluster CCD   freq freq freq freq freq freq freq freq freq   freq freq freq   freq        
CCSD         freq             freq freq              
CCSD=FULL         dnf               freq       dnf      
CCSD(T)         freq             dnf freq dnf            
CCSD(T)=FULL         freq               freq dnf   dnf dnf      
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 aug-cc-pVQZ daug-cc-pVDZ 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 freqR freqR freqR freqR freqR freqR     freqR
density functional BLYP                 freqR
B1B95                 freqR
B3LYP freqR freqR freqR freqR freqR freqR     freqR
B3LYPultrafine                 freqR
B3PW91                 freqR
mPW1PW91                 freqR
M06-2X                 freqR
PBEPBE                 freq1R
PBEPBEultrafine                 freq1R
PBE1PBE                 freqR
HSEh1PBE                 freqR
TPSSh                 freqR
wB97X-D freqR freqR freqR freq1R freqR freqR     freqR
B97D3                 freqR
Moller Plesset perturbation MP2 freqR freqR freqR freqR freqR freqR     freqR
MP2=FULL                 freqR
B2PLYP                 freqR
B2PLYP=FULL                 freqR
B2PLYP=FULLultrafine                 freqR
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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