Question

How do I know where to place the elements in the lewis structure of PF3Cl2? I understand the electron geometry is trigonal bipyramidal, but I don't know where exactly I'm supposed to be placing them.

This is to help me determine what the bond angles are for F-P-F, F-P-Cl, and Cl-P-Cl.

Answer 1

So we know that the central atom must be P because there are five atoms attached to it. We can assume it is nonpolar, so F must be in a ring of three, and the Cl should be opposite each other following the given geometry.

Answer 2

Does this mean we always have to fill the equatorial first and then the axial?

Answer 3

Not really, as long as you know the geometry you will know the angles. However, atoms are generally arranged to be non-polar.

Answer 4

Phosphorus can accomadate any number of electrons since it has d orbitals, but since it has 5 electrons in its outer shell, then u know it can make 5 covalent bonds, in that case there cannot be any lone pair electrons to cause lone pair repulsion, So it would be a linear geometry, where the angle between the axial plane is 120 degree, and between the top one would be 90 degree

Answer 5

Ahh I see, I see. But what about specific placement the elements? Right now, I have, and I'm guessing this would be wrong placement.. I did a clockwise placement. How am I really supposed to place them?