Guess for binuclear TM complex where both TM atoms have a different oxidation st

[martijn]

Hi,

I have a binuclear TM complex for which I want to simulate a situation where both TM atoms have a different oxidation state. Is there a "simple" way to obtain a guess for such a situation? The default Huckel guess with the appropriate number on unpaired electrons, is not unsurprisingly symmetric, flip is not an option as since that only allows one to break spin symmetry, and there are too many electrons to manually allocate all electrons.

Thanks,

Martijn

[Arnim]

Hi Martijn,

that is an interesting question.
It should be possible, but that is  maybe not so simple.

Set up the calculation in the normal way. Make a backup with 'cpc back'
Remove everything but not the coord. Edit the coord and change one element to a different element. E.g. Ir -> Os.
Run define again. In "ATOMIC ATTRIBUTE DEFINITION MENU" set the nuclear charge of the modified element to the values to the original. E.g. c "os" 77
Then the EHT should give something unsysmmetrical.
Copy back/coord to coord, back/basis to basis, back/auxbasis to auxbasis, and back/control to control.

Then you should be able to run it.

Cheers,
Arnim

 

[martijn]

Thanks! I'll give that suggestion a try.