Week 9 Achieve 2

[Amanda Nguyen dis 2E]

Could someone review how you determine the coordination numbers of coordination compounds, such as for K3[CoF6]? Thank you!

[Phillip Ma 1J]

You are supposed to count the ligands that are attached to the metal cation. For example, in that example, Co is attached to 6F, so there are six ligands. Beware of compounds like edta, en, and dien. They have different coordination numbers than what you'd expect. edta has 6 ligands, en has 2, and dien has 3. They are polydentate (meaning they are ligands that donate multiple pairs of electrons to the same atom).

[Ellen Tsai 3D]

To find coordination numbers, I visualize a dot structure of the compound and then I count how many molecules are connected to the central atom!

[sophiavmr]

The coordination number is the number of ligands bonded to the central metal atom. It is helpful to draw a visual and count the number of bonds that the central atom forms—this number is your coordination number.

[Emily Wan 1l]

I like to draw out a visual representation of the compound and count the number of atoms bound to the central atom.

[Stephanie Trinh 1F]

You can determine the coordination number by counting the ligands bound to the central metal. In K3[CoF6], the coordination number would be 6 because there are six ligands attached to the central Co.

[Coraly De Leon]

Hi !
Just like my peers, I draw a visual structure of the compound, since I am more of a visual learner, and from there I count the number of atoms bound to the central atom.