[Alpha-Omega]

I am conused too...OK we did the XeCl4....we know all that is done....the ICl3 is completed   and that is done...so now stuck with the TeF4....OK I am just not following the statements "I put these in and they are wrong" 

What is wrong...because ICl3 is <90

so are you sayin g the XeCl4 is stll wrong? andf you need help wit TeF4?

[Joules23]

Yes XeCl₄ is completed
Yes, ICl₃ is completed.. but i got it wrong because the answer is <90 and <180.... I was allowed only two attempts, and i put: <90 and 180
just <90

Now im stuck on TeF₄

[Kryolith]

I guess only two?... But looking at SF₄, which should have the same bond angles as TeF₄ (right?).. im gettin mixed signals

SF₄ and TeF₄ are both distorted tetrahedral, but that doesn't mean they have the same bond angles.
You are right: there are three angles (my fault) F_eqSF_eq, F_axSF_ax and F_axSF_eq
Why do you think there should be an angle <120° in consideration of the possible answers. (Example: Of course an angle <90° is also <120°, but <120° is wrong when the angle is < 90°, you know what I mean)

[Alpha-Omega]

OK ICl3  is correct.

XeCl4

Octahedral EG
Square Planar MG


The TeF4

TPB  EG
SeeSaw MG


OK use the same ezact logic


SF4 and TeF4 are the same 

Electronic Geometry : TBP

Molecular Geometry:  See-Saw


sp3d  bond angles:  120, 160

YES distortion due to equitorial lone pair repulsion:  so angles are 177 and 104

Attaching picture

[Joules23]

Just made this in Paint.. this is what i think

[Kryolith]

Is TeF₄ AB₄E₂?

(Perhaps you call it AR₄U₂, same thing anyway)

[Joules23]

But what about this angle...

[Alpha-Omega]

OK so you have an AB4E2...or AB4 U2...same thing...you can clearly see the see-saw structure in the pic...the one done in paint...and that is definitly a distorted tetrahedral....

[Kryolith]

OK so you have an AB4E2...or AB4 U2...same thing...

No. It's not AB₄E₂

Just made this in Paint.. this is what i think

This one I forgot when I was asking you "Are there really three...."
This is the F_axTeF_eq angle. Value?

[Alpha-Omega]

Look at your central atom Te...what group is it in?  Isn't it in the same group as sulfur....so what is the structure?

[Alpha-Omega]

That is what I am trying to say...he has the wrong formula...AB4U...is the ormula...that is what is wrong with his pic....but you can still see the seesaw even though his geometry is wrong....nNOT DEFINTLY NOT AB4E2...it is AB4E

or AB4U...that is the correct formula

[Alpha-Omega]

Your picture in PAINT represents OCTAHEDRAL geometry with two equitorial lone pairs...that is incorrect for your Te central atom..

[Kryolith]

...or AB4U...that is the correct formula

Then we are agreed  

[Joules23]

How about this.. and what about that angle in your pic i edited

[Alpha-Omega]

YES...OK let me restate comparison I was making...look at his paint pic....you can see the see-saw in there (have to skew the view) but he has way too many pairs of e-....supposed to give hints and not solve....I try that does not always work...and I thing with regard to geometry...picture is worth 1000 words...

Sorry about the confusion