Dear colleagues
I have a question about multiplicity.
I took note that Psi4 determines how many unpaired electrons a molecule has by looking at the user-specified spin multiplicity. Ok.
My question is: what does Psi4 consider if I don’t provide neither the charge nor the multiplicity in the script like as:
molecule{
atom1_molecule1 x y z
atom2_molecule1 x y z
...
--
atom1_molecule2 x y z
atom2_molecule2 x y z
...
}
The “correct” one would be below:
molecule{
charge multiplicity
atom1_molecule1 x y z
atom2_molecule1 x y z
...
--
charge multiplicity
atom1_molecule2 x y z
atom2_molecule2 x y z
...
}
Thanks in advance.
.