A series of anions is shown below:

The anion on the far right is called 'BARF' by chemists, as its common abbreviation sounds similar to this word. (b) What is the electron-domain geometry around the central B in BARF?

Video transcript

Welcome back everyone in this example. We need to determine the electron geometry around phosphorus in the following compound. So phosphorus we can see in this compound is our central atom. And recall that to determine its electron geometry, we need to look at its bonding regions that it has. So we can see that bonding regions can either be considered bonds to other atoms in the molecule or it can also be loan hairs on our central atom. But we don't have any lone pairs. So right now we can count a total of carbon atoms that the central phosphorus is bonded to with a total of 12345 bonds that it's co violently sharing these electrons with. So we can note down that phosphorus is surrounded By five carbon atoms and so therefore It has five bonding regions. We did not consider any of these bonding regions lone pairs. So we have zero lone pairs on phosphorus. And because we have a total of five bonding regions with zero lone pairs, we would say that therefore we have an electron geometry that is considered tribunal by pyramidal. So this is going to be our final answer to complete this example as our electron geometry of our given compound. I hope everything I reviewed was clear. If you have any questions, leave them down below and I'll see everyone in the next practice video