<![CDATA[Multiwfn forum / Spin Density at the Nuclues – From which orbitals does it rise?]]> //www.umsyar.com/wfnbbs/viewtopic.php?id=724 The most recent posts in Spin Density at the Nuclues – From which orbitals does it rise?. Thu, 06 Oct 2022 11:32:30 +0000 FluxBB <![CDATA[Re: Spin Density at the Nuclues – From which orbitals does it rise?]]> //www.umsyar.com/wfnbbs/viewtopic.php?pid=2767#p2767

I don't understand your meaning. Multiwfn outputs the data using scientific format with eight significant digits, it is adequately accurate even if the magnitude reaches 1E6.

dummy@example.com (sobereva) Thu, 06 Oct 2022 11:32:30 +0000 //www.umsyar.com/wfnbbs/viewtopic.php?pid=2767#p2767
<![CDATA[Re: Spin Density at the Nuclues – From which orbitals does it rise?]]> //www.umsyar.com/wfnbbs/viewtopic.php?pid=2766#p2766

Thank you for your fast answer. This helps a lot!! My strongest contributions start in the region of E+06. Is there a possibility to show more decimal digits?


sobereva wrote:

This can be realized by Multiwfn. After booting up Multiwfn and load a wavefunction file, enter the following commands
1  // Enter main function 1
d  // Decompose real space function at a point to orbital contributions
[Input X,Y,Z of a nucleus]
1  // Unit is Bohr (also you can choose 2 to select Angstrom)
5  // Spin density
[Press ENTER button]  // Contribution from 10 orbitals having largest contributions will be shown

Then you can see

Contribution from orbital 20 (occ= 1.000000): -0.13833944E+03 a.u. Contribution from orbital 1 (occ= 1.000000): 0.13820669E+03 a.u. Contribution from orbital 2 (occ= 1.000000): 0.63424863E+01 a.u. Contribution from orbital 21 (occ= 1.000000): -0.60051753E+01 a.u. Contribution from orbital 6 (occ= 1.000000): 0.12114241E+01 a.u. Contribution from orbital 23 (occ= 1.000000): -0.57635741E+00 a.u. Contribution from orbital 5 (occ= 1.000000): 0.57405887E+00 a.u. Contribution from orbital 22 (occ= 1.000000): -0.67708475E-35 a.u. Contribution from orbital 4 (occ= 1.000000): 0.95628644E-65 a.u. Contribution from orbital 3 (occ= 1.000000): 0.00000000E+00 a.u. Sum of above values: 0.14136869E+01 a.u. Exact value: 0.14136869E+01 a.u.

The "exact value" is actual spin density at the given point, "Sum of above values" is sum of the printed terms.

Please also note that the index of beta orbitals is after that of alpha orbitals. After loading the file, you can see such as following information from screen

Orbitals from 1 to 19 are alpha, from 1 to 6 are occupied Orbitals from 20 to 38 are beta, from 20 to 23 are occupied

Therefore e.g. orbitals 20 and 21 are the first and second beta orbitals, respectively.

dummy@example.com (phil.engel98) Thu, 06 Oct 2022 11:21:03 +0000 //www.umsyar.com/wfnbbs/viewtopic.php?pid=2766#p2766
<![CDATA[Re: Spin Density at the Nuclues – From which orbitals does it rise?]]> //www.umsyar.com/wfnbbs/viewtopic.php?pid=2763#p2763

This can be realized by Multiwfn. After booting up Multiwfn and load a wavefunction file, enter the following commands
1  // Enter main function 1
d  // Decompose real space function at a point to orbital contributions
[Input X,Y,Z of a nucleus]
1  // Unit is Bohr (also you can choose 2 to select Angstrom)
5  // Spin density
[Press ENTER button]  // Contribution from 10 orbitals having largest contributions will be shown

Then you can see

Contribution from orbital 20 (occ= 1.000000): -0.13833944E+03 a.u. Contribution from orbital 1 (occ= 1.000000): 0.13820669E+03 a.u. Contribution from orbital 2 (occ= 1.000000): 0.63424863E+01 a.u. Contribution from orbital 21 (occ= 1.000000): -0.60051753E+01 a.u. Contribution from orbital 6 (occ= 1.000000): 0.12114241E+01 a.u. Contribution from orbital 23 (occ= 1.000000): -0.57635741E+00 a.u. Contribution from orbital 5 (occ= 1.000000): 0.57405887E+00 a.u. Contribution from orbital 22 (occ= 1.000000): -0.67708475E-35 a.u. Contribution from orbital 4 (occ= 1.000000): 0.95628644E-65 a.u. Contribution from orbital 3 (occ= 1.000000): 0.00000000E+00 a.u. Sum of above values: 0.14136869E+01 a.u. Exact value: 0.14136869E+01 a.u.

The "exact value" is actual spin density at the given point, "Sum of above values" is sum of the printed terms.

Please also note that the index of beta orbitals is after that of alpha orbitals. After loading the file, you can see such as following information from screen

Orbitals from 1 to 19 are alpha, from 1 to 6 are occupied Orbitals from 20 to 38 are beta, from 20 to 23 are occupied

Therefore e.g. orbitals 20 and 21 are the first and second beta orbitals, respectively.

dummy@example.com (sobereva) Thu, 06 Oct 2022 08:00:33 +0000 //www.umsyar.com/wfnbbs/viewtopic.php?pid=2763#p2763
<![CDATA[Spin Density at the Nuclues – From which orbitals does it rise?]]> //www.umsyar.com/wfnbbs/viewtopic.php?pid=2762#p2762

Multiwfn can print out the spin density at a nucles. Is it possible to find out from which orbitals the spin density at the nucleus rises?

Thanks for your help!
Best wishes
Philipp

dummy@example.com (phil.engel98) Thu, 06 Oct 2022 06:32:44 +0000 //www.umsyar.com/wfnbbs/viewtopic.php?pid=2762#p2762
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