3 posts • Page 1 of 1
Maeve Miller 1A wrote:Can someone explain how to determine whether or not a ligand is polydentate? Does it always involve drawing out the full compound to see where lone pairs are present?
A ligand is considered polydentate if it has two or more lone pairs that it is able to donate to the lewis acid/TM cation. The easiest way to see if a ligand CAN be polydentate is to draw out its lewis structure. I say it CAN be a polydentate because even though water has two lone pairs, a lot of times it acts as a monodentate as only one lone pair is "donated" to the TM cation, or it only binds at one spot.
I'd say yes draw it out to be sure the formal charges are correct and the number of lone pairs on the central atom are correct. I doubt there will be a test question where part a doesn't involve drawing the shape anyway.
Who is online
Users browsing this forum: No registered users and 1 guest