coordination number

[Heather Szeszulski 1I]

Can someone explain how coordination numbers work and how to fin them from a coordination compound. For example what would be Ba[FeBr4]2 coordination number be and [NiCN4]^2-

[IsaacLaw1E]

Coordination numbers are the number of bonds the central metal ion forms with its ligands. For Ba[FeBr4]2, the coordination number is 4 because the Fe is bonded to 4 ligands, which are the 4 Br. For [Ni(CN)4]^2-, its 4 because Ni is bonded to 4 CN.

[Rose_Malki_3G]

Coordination number refers to the number of donor atoms from the ligands that are bonded to the central atom. To find this, determine what the ligands' types (mono dentate, bidentate, etc.) and based on this, count the number of atoms that are bonded to the centra atom. In [FeBr4]2 the coordination number is 4 since there are 4 donor atoms and in [NiCN4]^2- the coordination number is 4 because there are 4 donor atoms.

[Emma Ide 2E]

In both of these cases the ligands are monodentate, meaning they only give one donor atom to the central atom, so the number of ligands, which is 4 for both of these, indicates the coordination number. However, if the ligands were bidentate, then they would give 2 donor atoms and the coordination number would have to be multiplied by 2, and so on depending on the denticity of the ligand.

[lwon Dis2I]

Can someone explain more in detail of what bidentate means in a coordination compound and how it is different from a monodentate?

[Eric Cruz 2G]

To find the coordination number of the transition metal, you focus on the atoms that bond to the central atom (the TM). Therefore, you only focus on the molecules within the bracket. Therefore for both of them, the coordination number would be 4.

[RitaThomas_3G]

One other thing to keep in mind when calculating the coordination number is that you don't need to account for the molecules outside of the brackets, because they are out of the coordination sphere.

[Kelly Singh]

Can someone explain more in detail of what bidentate means in a coordination compound and how it is different from a monodentate?

Bidentate ligands are able to attach/bond to the transition metal twice. (Tridentate= three times, polydentate= multiple bonds)

[Kelly Singh]

Can someone explain more in detail of what bidentate means in a coordination compound and how it is different from a monodentate?

Bidentate ligands are able to attach/bond to the transition metal twice. (Tridentate= three times, polydentate= multiple bonds)

Sorry, forgot to add this. This means that for every one of these ligands, the coordination number would increase by two,

[Jasmine Ho 3I]

You can get the coordination number by looking at how many atoms/compunds are inside the brackets (aside from the transition metal), because those are directly bonded to the transition metal.

[Jaden Joodi 3J]

Coordination number is simply the number of the bonds connected to the transition metal cation.

[Violet Kwan 3H]

The coordination number is the number of bonds made with the transition metal. Some ligands may have more than one bonding sites with the transition metal, such as bidentate and tridentate ligands. A bidentate would count as 2 and a tridentate would count as 3. To get the coordination number, you would add up the total number of bonded atoms.

[Chenning Yang Dis3l]

THank you for the info I was confused!

[Leyla Anwar 3B]

Can someone explain more in detail of what bidentate means in a coordination compound and how it is different from a monodentate?

Bidentate ligands are able to attach/bond to the transition metal twice. (Tridentate= three times, polydentate= multiple bonds)

Sorry, forgot to add this. This means that for every one of these ligands, the coordination number would increase by two,

What do you mean by increase by two? If the ligand is bidentate and it connects to the TM two times does that mean that those 2 bonds count as 2 for the coordination number?