welcome: please sign in

Upload page content

You can upload content for the page named below. If you change the page name, you can also upload content for another page. If the page name is empty, we derive the page name from the file name.

File to load page content from
Page name
Comment
What is the Admin password?

location: Electronic states of IBr+ from IBr as reference

Input

$COMPASS
Title
 CH2O+ Molecule test run
Basis
 ano-rcc-vtzp
Geometry
 I  0.0 0.0 0.0
 Br 0.0 0.0 2.4
END geometry
group
c(1)
$END

$XUANYUAN
scalar
heff
3
soint
hsoc
2
$END

$SCF
RHF
charge
0
spin
1
$END

$TRAINT
orbi
hforb
$END

$CCSDSO
MEMMEGA
40000
itriple
0
ifdebug
0
maxTcyc
100
threshT
10
$END

$EOMIPSO
MEMMEGA
40000
nroots
8 0 0 0 0 0 0 0
ifdebug
0
$END

Output

grep 'EXCITED STATE' in the output, the following results will be found

EXCITED STATE    1 ENERGY:      0.353732546294     -0.000000000000      9.625556430678eV
EXCITED STATE    2 ENERGY:      0.372675469829     -0.000000000000     10.141019826274eV
EXCITED STATE    3 ENERGY:      0.445807213072     -0.000000000000     12.131036659141eV
EXCITED STATE    4 ENERGY:      0.460122479736      0.000000000000     12.520575050608eV
EXCITED STATE    5 ENERGY:      0.504585100956     -0.000000000000     13.730465048273eV
EXCITED STATE    6 ENERGY:      0.567408973367     -0.000000000000     15.439990324973eV
EXCITED STATE    7 ENERGY:      0.572574989992      0.000000000000     15.580564849613eV
EXCITED STATE    8 ENERGY:      0.600837510259     -0.000000000000     16.349627483387eV

which gives relative energies (eV) for states of IBr+ as:

0.0
0.515463396
2.505480228
2.89501862
4.104908618
5.814433894
5.955008419
6.724071053

This could be compared with TD-DFT results for the first few states, which share the same configurations:

    1      -4.1081 eV    49.9%  Spin: |So,1>    1-th   B2   -3.8266   -0.2815    0.0000         0.00
    2      -4.1081 eV    49.9%  Spin: |So,2>    1-th   B2   -3.8266   -0.2815    0.0000         0.00
    3      -3.5878 eV    49.5%  Spin: |So,1>    1-th   B1   -3.8266    0.2388    0.5203      4196.81
    4      -3.5878 eV    49.5%  Spin: |So,2>    1-th   B1   -3.8266    0.2388    0.5203      4196.81
    5      -1.6230 eV    49.9%  Spin: |So,1>    2-th   B2   -1.4243   -0.1987    2.4851     20043.67
    6      -1.6230 eV    49.9%  Spin: |So,2>    2-th   B2   -1.4243   -0.1987    2.4851     20043.67
    7      -1.2286 eV    49.9%  Spin: |So,1>    2-th   B1   -1.4243    0.1957    2.8795     23224.68
    8      -1.2286 eV    49.9%  Spin: |So,2>    2-th   B1   -1.4243    0.1957    2.8795     23224.68
    9      -0.0915 eV    94.6%  Spin: |Gs,1>    0-th   A1    0.0000   -0.0915    4.0166     32395.92
   10      -0.0915 eV    94.6%  Spin: |Gs,2>    0-th   A1    0.0000   -0.0915    4.0166     32395.92
   11       1.0921 eV    50.0%  Spin: |S+,4>    1-th   B2    1.3992   -0.3071    5.2002     41942.64
   12       1.0921 eV    50.0%  Spin: |S+,1>    1-th   B2    1.3992   -0.3071    5.2002     41942.64
   13       1.2737 eV    49.5%  Spin: |S+,3>    1-th   B2    1.3992   -0.1255    5.3818     43406.97
   14       1.2737 eV    49.5%  Spin: |S+,2>    1-th   B2    1.3992   -0.1255    5.3818     43406.97
   15       1.4780 eV    49.0%  Spin: |S+,2>    1-th   B1    1.3992    0.0788    5.5862     45055.34
   16       1.4780 eV    49.0%  Spin: |S+,3>    1-th   B1    1.3992    0.0788    5.5862     45055.34

The results show that for the first few states, both methods give very similar energies.