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Calculated Ionization Energy for As (Arsenic atomic)

20 09 09 14 00
Experimental Ionization Energy is 9.8152 eV
Original data displayed. Press to display differences.
Differences displayed. Press to display original data.

Ionization Energies in eV
Methods with predefined basis sets
semi-empirical PM3  
PM6  
composite G1 9.901
G2MP2 9.879
G2 9.914
G3 9.803
G3B3 9.806
G4 9.800
CBS-Q 10.062

Ionization Energies in eV
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 7.003 9.331 9.428 9.560 9.480 9.480 9.503 9.449 9.449 9.468 9.442 9.454 9.460 9.443 9.438 9.470 9.441 9.438 9.467 9.441
ROHF   9.531 9.733 9.646 9.602 9.598 9.644 9.747 9.585   9.587 9.589 9.593 9.577 9.566 9.891 9.579 9.567 9.733 9.887
density functional BLYP 7.137 9.358 9.562 9.582 9.612 9.612 9.670 9.707 9.717 9.598 9.654 9.633 9.690 9.637   9.746 9.642   9.711 9.641
B1B95 7.522 9.750 9.750 9.793 9.801 9.801 9.838 9.792 9.792 9.789 9.794 9.787 9.788 9.782   9.816 9.785   9.814 9.784
B3LYP 7.411 9.600 9.799 9.827 9.849 9.849 9.893 9.863 9.863 9.836 9.867 9.857 9.844 9.856 9.852 9.884 9.857 9.852 9.882 9.857
B3LYPultrafine   9.600     9.849 9.849 9.893 9.863   9.836 9.867 9.857 9.844 9.856   9.884 9.857   9.882 9.857
B3PW91 7.614 9.791 9.970 10.005 10.012 10.012 10.043 10.006 10.006 9.997 10.006 10.009 10.005 9.999   10.027 9.999   10.025 9.999
mPW1PW91 7.615 9.787 9.963 10.002 10.008 10.008 10.041 10.001 10.001 9.993 10.003 10.001 9.998 9.996   10.023 9.998   10.020 9.998
M06-2X 7.573 9.585 9.687 9.896 9.862 9.862 9.895 9.826 9.826 9.853 9.824 9.782 9.835 9.803   9.865 9.803   9.864 9.803
PBEPBE 7.458 9.657 9.847 9.875 9.897 9.897 9.945 9.911 9.911 9.880 9.919 9.900 9.888 9.903   9.930 9.908   9.929 9.908
PBEPBEultrafine   9.657     9.897 9.897 9.945 9.911   9.880 9.919 9.900 9.888 9.903   9.930 9.908   9.929 9.908
PBE1PBE 7.577 9.931 9.931 9.973 9.981 9.981 10.015 9.976 9.976 9.965 9.978 9.973 9.969 9.969   9.994 9.971   9.992 9.971
HSEh1PBE 7.571 9.744 9.917 9.950 9.960 9.960 9.994 9.957 9.957 9.945 9.958 9.953 9.949 9.949   9.975 9.950   9.973 9.950
TPSSh 7.566 9.770 9.939 9.966 9.974 9.974 10.005 9.959 9.959 9.959 9.961 9.955 9.957 9.962 9.957 9.980 9.964 9.958 9.978 9.964
wB97X-D 7.459 9.625 9.791 9.811 9.812 9.812 9.843 9.775 9.775 9.797 9.777 9.781 9.790 9.762 9.768 9.811 9.765 9.770 9.809 9.765
B97D3 7.587 9.627 9.861 9.868 9.869 9.869 9.895 9.835 9.835 9.849 9.841 9.834 9.827 9.880 9.876 9.853 9.882 9.884 9.853 9.882
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 6.794 9.254 9.801 9.495 9.824 9.824 9.849 9.810 9.810 9.914 9.920 9.869 9.827 9.997 10.043 9.885 10.013 10.051 9.883 10.013
MP2=FULL 6.789 9.251 9.799 9.474 9.850 9.850 9.874 9.868 9.868 9.962 9.995 9.851 9.826 9.989 10.025 9.883 10.005 10.034 9.880 10.005
ROMP2 6.794                                      
MP3         9.834   9.859       9.946 9.840 9.819 9.991         9.885 10.006
MP3=FULL   9.200 9.789 9.422 9.844 9.844 9.869 9.829 9.829 9.959 9.966 9.813 9.813 9.974   9.881 9.990   9.878 9.989
MP4   9.179     9.805       9.794   9.939 9.826 9.790 9.994   9.866 10.012   9.863 10.012
MP4=FULL   9.176     9.818       9.828   9.989   9.787 9.984   9.862 10.003   9.859 10.002
B2PLYP 7.142 9.407 9.724 9.643 9.767 9.767 9.803 9.767 9.767 9.789 9.803 9.783 9.764 9.823   9.808 9.829   9.807 9.829
B2PLYP=FULL 7.141 9.406 9.724 9.636 9.777 9.777 9.812 9.787 9.787 9.805 9.829 9.777 9.763 9.820   9.808 9.827   9.806 9.827
B2PLYP=FULLultrafine 7.141 9.406 9.724 9.636 9.777 9.777 9.812 9.787 9.787 9.805 9.829 9.777 9.763 9.820   9.808 9.827   9.806 9.827
Configuration interaction CID   9.162 9.726 9.402 9.767     9.752     9.873   9.750 9.905         9.809 9.917
CISD   9.162 9.717 9.403 9.758     9.743     9.864   9.742 9.898         9.800 9.910
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   9.163 9.732 9.404 9.770 9.770 9.795 9.756 9.756 9.877 9.881 9.786 9.756 9.931   9.821 9.945   9.819 9.945
QCISD(T)         9.773     9.764     9.914 9.794 9.760 9.965   9.834 9.983   9.832 9.983
QCISD(T)=FULL         9.785   9.811       9.951   9.756 9.953 9.989 9.830 9.971 9.996 9.827 9.971
QCISD(TQ)         9.775   9.801       9.919   9.760 9.966 10.008 9.836 9.985 10.014 9.833 9.984
QCISD(TQ)=FULL         9.786   9.812       9.952   9.756 9.952 9.988 9.830 9.970 9.994 9.828 9.970
Coupled Cluster CCD   9.162 9.740 9.403 9.779 9.779 9.805 9.765 9.765 9.886 9.890 9.792 9.764 9.939   9.831 9.954   9.828 9.954
CCSD         9.771 9.771 9.796 9.757 9.757 9.878 9.882 9.787 9.757 9.932 9.967 9.822 9.946 9.972 9.820 9.946
CCSD=FULL         9.781         9.902 9.918 9.765 9.752 9.918 9.947 9.817 9.933 9.952 9.814 9.932
CCSD(T)         9.774 9.774 9.800 9.765 9.765 9.907 9.915 9.794 9.760 9.966 10.009 9.835 9.984 10.016 9.832 9.984
CCSD(T)=FULL         9.786           9.952 9.772 9.757 9.953 9.990 9.830 9.971 9.996 9.828 9.971
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

Ionization Energies in eV
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 9.602   9.602   9.670 9.654     9.450
ROHF                 9.678
density functional BLYP                 9.632
B1B95                 9.786
B3LYP 9.934   9.934   9.990 9.994     9.857
B3LYPultrafine                 9.857
B3PW91                 10.008
mPW1PW91                 10.000
M06-2X                 9.775
PBEPBE                 9.900
PBEPBEultrafine                 9.900
PBE1PBE                 9.972
HSEh1PBE                 9.952
TPSSh                 9.954
wB97X-D 9.911   9.911   9.996 9.960     9.780
B97D3                 9.830
Moller Plesset perturbation MP2 9.502   9.502   9.546 9.542     10.014
MP2=FULL                 9.996
MP3                 10.000
MP3=FULL                 9.974
MP4=FULL                 9.990
B2PLYP                 9.829
B2PLYP=FULL                 9.824
B2PLYP=FULLultrafine             9.783   9.824
Configuration interaction CID                 9.909
CISD                 9.903
Quadratic configuration interaction QCISD                 9.944
QCISD(T)                 9.977
QCISD(T)=FULL                 9.956
QCISD(TQ)                 9.979
QCISD(TQ)=FULL                 9.956
Coupled Cluster CCD                 9.952
CCSD                 9.945
CCSD=FULL                 9.923
CCSD(T)                 9.978
CCSD(T)=FULL                 9.957
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.