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Calculated Frequencies for MgO (magnesium oxide) 1Σ+ C∞v

19 07 18 15 43
InChI=1S/Mg.O INChIKey=CPLXHLVBOLITMK-UHFFFAOYSA-N


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An R subscript indicates raman activity data is available.
For a comparison of experimental versus calculated see section IV.C.1 Compare vibrational frequencies
Vibrational frequency in cm-1 (unscaled)
Methods with predefined basis sets
semi-empirical PM6 881
composite G4 838
molecular mechanics DREIDING 927

Vibrational frequency in cm-1 (unscaled)
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 cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ daug-cc-pVTZ
hartree fock HF 800 649 815 624 768 768 763 748 747 822 821 657 745 798 817   805 818 798 754 819 806
density functional LSDA 1080 853 903 807 849 849 818 837 837 863     834 852   834     852      
BLYP 1020 812 861 763 803 803 768 787 787 816           781            
B1B95 1023   898 794 847 844 816 828 828 853     833 840   832     840 834 843  
B3LYP 1016 838 886 782 826 826 791 809 809 838 821 763 814 822 826   815 821 822 815 830  
B3LYPultrafine         825                       810          
B3PW91 1029 839 885 787 831 831 801 817 817 845           818            
mPW1PW91 1028 844 891 791 837 837 806 823 823 851       836   824     836      
M06-2X     927   863           852R                      
PBEPBE 1039 814 862 770 811 811 779 797 797 824 805   800 810   793     810      
PBEPBEultrafine         809                                  
PBE1PBE         837                                  
HSEh1PBE   843     836   804             834                
TPSSh         826   796     840       827                
wB97X-D     922   850   836   861     821 836 857     849          
B97D3   793     794   774   785   795 749   801     794         795R
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 cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ daug-cc-pVTZ
Moller Plesset perturbation MP2 1118 1254 1170 1072 1071 1071 997 1051 1051 1042   960 1068 1034 1022 1008 1009 1013 1034 1068 1031  
MP2=FULL   1251     1063 1063 991 1048 1048       1062 1033 1019 1001 1000   1033 1058 1017  
MP3         783                                  
MP3=FULL         777   715                              
MP4         1229     1183           1148                
B2PLYP         863                 854                
B2PLYP=FULLultrafine         860R               853R 854R     836          
Configuration interaction CID         841     826                            
CISD         796                                  
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 cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ daug-cc-pVTZ
Quadratic configuration interaction QCISD   699     710 710 698 707 707       707 719         719      
QCISD(T)         728     714                            
Coupled Cluster CCD         841     822         841 811         811 832 798  
CCSD         728     721                            
CCSD(T)   670     753 752 726 745 745   780     785         785 743 798  
CCSD(T)=FULL         747               732 798         798 740 809  
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 cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ daug-cc-pVTZ

Vibrational frequency in cm-1 (unscaled)
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 601 723 606 735 676 619     816
density functional B1B95 761 800              
B3LYP 742 783 742 784 803 763     821
PBEPBE                 806
Moller Plesset perturbation MP2 950 987 990 1001 1065 1030     1013
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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