[molpro-user] Forcing occupation numbers for HF initial guess
Nike Dattani
dattani.nike at gmail.com
Wed Dec 21 04:36:54 CET 2016
Greetings!
I am using MOLPRO 2012 and would like to have ROHF for Li2 with the
following:
alpha occupancy: 3 0 0 0 1 0 0 0
beta occupancy: 1 0 0 0 1 0 0 0
But even if I have:
occ,3,0,0,0,1,0,0,0
The ROHF program prints:
"Orbital guess generated from atomic densities. Full valence occupancy:
2 0 0 0 2 0 0 0
Initial alpha occupancy: 2 0 0 0 2 0 0 0
Initial beta occupancy: 1 0 0 0 1 0 0 0",
and the SCF converges to this (incorrect) solution.
I was not able to fix this by using "sym 1" in the wf card, and/or
by adding "closed,1,0,0,0,1,0,0,0".
Said another way, the input file:
========
geometry={angstrom;Li1;Li2,Li1,3.065}
basis = cc-pVDZ
wf,charge=0,spin=2,sym=1
occ, 3,0,0,0,1,0,0,0
closed,1,0,0,0,1,0,0,0
core
rhf
========
gives an ROHF occupancy with sym=5 and:
alpha occupancy: 2 0 0 0 2 0 0 0
beta occupancy: 1 0 0 0 1 0 0 0
regardless of whether or not I have "sym=1" and/or the "closed" card
specified as above.
What can I do to force the correct initial guess to have the occupancies I
want?
Respectfully yours,
Nike Dattani
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