CO2 3- Polydentate Ligand

[Kavya Anand 2B]

Hi, I was wondering if someone could explain how CO2 3- is a polydentate ligand. Does a molecule only need one spacer in order to be able to bind to a complex multiple times?

[Nathan Morgan 2C]

Hi!

CO2 does not have a 3- charge and I'm pretty sure it is considered a monodentate. Are you referring to another molecule

[Kavya Anand 2B]

Hi, I actually meant CO3 2-, my bad.

[505784197]

Another thing to add is that two lone pairs on the same electron cannot act as a polydentate ( I got confused on this at first so thought I'd mention it). Also, we can only count sigma bonds, not pi bonds.