coordination number

[mya warner 2C]

I'm still having some trouble understanding how to find the coordination number of a molecular compound, like the second exercise on Week 9 HW. Would someone please explain their process that they go through to find the coordination numbers?

[Jaipal Virdi 2I]

In the context of our class, the coordination number refers to how many different ligands are bonded (total number of donor atoms) to the central metal species/complex. For example [M(NH3)3] would have a coordination number of 3 since there are three monodentate (NH3) ligands being bonded. Remember anything outside of the brackets or coordination sphere is not included. I hope this helps!

[405825570]

Could someone maybe explain what a coordination sphere is and why it is significant? thank you

[Meghan Spoeri 2D]

hi! A coordination sphere of a coordination complex is made up of the central metal atom and its attached ligands.

[Nancy_La_1H]

Coordination Number is just the number of ligand bonded to the central atom(usually a TM). Only count the ligands that are inside the brackets. When there are parentheses, count the subscript of the parentheses not the molecule inside of it.

[mya warner 2C]

As a follow up, how does the charge of the overall compound, the number outside of the brackets such as [Ni(CN)4]^2- , affect the coordination compound, if at all?

[Ivy Vo Dis 1C]

A coordination number is the total number of ligands that are bonded to a central metal cation. When counting to find the coordination number, we only recognize what is within the coordination sphere (what is within the brackets). The coordination number would be the subscript of the ligand compound.

[Caitlyn Lo 2F]

The coordination number is the number of ligands bonded to the central metal atom

[Gavin Trent 2F]

The coordination number of a compound is just the total number of bonds between the central metal cation and its ligands. One tip is that (en) is bidentate, meaning it adds 2 to the coordination number, and (edta) is hexadentate, meaning it adds six.

[Adithi Ayyala 2G]

Hi!
The coordination number just refers to the number of ligands bonded to the central transition metal. As a result, when given the chemical formula for a coordination compound, just count up how many ligands are in the coordination sphere, and when given the diagram of it, just count how many individual ligands are bonded to the central metal.
Hope this helps!