Calculating charge density of particular ligands

[jappy190]

Hi everyone, this is my first thread!
I am currently undergoing a personal investigation that is based on one of the factors which effect the splitting of d orbitals in central metal ion by the charge density of ligands (in a complex ion).

However, recently I got stumped by trying to calculate charge density when dealing with polyatomic ligands such as cyanide and ammonia, as well as neutral compounds such as water . Perhaps I should try to look at partial charge? I am not sure.

I used the formula (charge on ion * charge on one electron / 4*pi* ionic radii cubed) to find the charge density of ions such as bromide and chloride ion. For my metal ion I am using cobalt (III) ion

To say in brief:
How do I calculate charge density of ligands like water which do not have an overall charge, for complex ions. Also how to find the charge density of ligands of polyatomic compounds like ammonia and cyanide?

 

[TeethWhitener]

You might start by googling "spectrochemical series."

 

[jappy190]

Thanks for your suggestion !