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#1 Yesterday 08:32:55

saeed_E
Member
Registered: 2019-12-21
Posts: 334

How to compute overlap between occupied orbitals?

Dear Tian,
Hi. If possible, please let me ask a challenging question that I could not find the solution in the manual of the newest version of Multiwfn.
Please consider a fully optimized TS composed of two interacting fragments A and B. Now, one wants to compute overlap between only occupied orbital of A and B. The main goal of such calculation is finding the Pauli repulsion between two interacting fragments. Could you please let me know how this goal should be achaived? Please do not refer me to the ETS-NOCV calculations since I insist to calculate Pauili repulsion through the mentioned strategy, if possible.

Sincerely yours,
Saeed

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#2 Yesterday 10:23:17

sobereva
Tian Lu (Multiwfn developer)
From: Athens, Greece
Registered: 2017-09-11
Posts: 2,177
Website

Re: How to compute overlap between occupied orbitals?

The function introduced in Section 3.100.15 and exemplified in Section 4.100.15 of Multiwfn manual can calculate overlap integral between orbitals of two different wavefunction files.

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#3 Yesterday 19:03:59

saeed_E
Member
Registered: 2019-12-21
Posts: 334

Re: How to compute overlap between occupied orbitals?

Thank you so much.
Saeed

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