is there a way to predict if a complex ion is tetrahedral or planar?
Those with coordination number 4 can be either of the both so how to tell?
Original post by alow
Calculating crystal field stabilisation energy usually gives the correct answer.
Is that alevel chemistry?
Original post by thebrahmabull
Those with coordination number 4 can be either of the both so how to tell?
Maybe its to do with the number of atoms its bonded to. If its bonded to 2 or 3 it is planar and if 4 then its tetrahedral.
Original post by Xenon17
Maybe its to do with the number of atoms its bonded to. If its bonded to 2 or 3 it is planar and if 4 then its tetrahedral.
Nope. Coordination number 4 means 4 coordinate bonds are made with central atom/ion.
Original post by thebrahmabull
Those with coordination number 4 can be either of the both so how to tell?
cisplatin is square planar, thats the only one I have seen that is!
(Cu(Cl)4)2- is Tetrahedral
Original post by thebrahmabull
Is that alevel chemistry?
Nope. There's no way to predict the shapes from A Level content.
Original post by Xenon17
Maybe its to do with the number of atoms its bonded to. If its bonded to 2 or 3 it is planar and if 4 then its tetrahedral.
That's called hapticity, and until you learn more it'll be difficult to make predictions from it.
Crystal field theory is the way to go tbh.
I think the only square planar complex ion in A Level is platin. Rest are probably all tetrahedral
Original post by alow
Nope. There's no way to predict the shapes from A Level content.
That's called hapticity, and until you learn more it'll be difficult to make predictions from it.
Crystal field theory is the way to go tbh.
That's called hapticity, and until you learn more it'll be difficult to make predictions from it.
Crystal field theory is the way to go tbh.
OK thanks
Platinum and nickel 4 coordinate complexes usually form planar geometry, beyond a level you would use ligand field stabilisation energy, andeven then its difficult, but you definitely don't need to know about that. Just remember nickel and platinum
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