b. Draw the resonance contributors for anilinium ion.

Question

Accepted Answer

Hey, everyone, let's do this problem and says, draw all the significant resonance structures of the fennel metha Liam ion. So we have a benzene ring with a ch two group attached and that carbon has a positive charge. So before we draw resonance structures, let's review what resonance structures are. So residents structures Are two or more structures of the same compound. But if they're the same compound, what's making them different, right? They're going to have the same connectivity but they'll have different electron distribution. Alright. So a few things to remember when drawing resonance forms, the first step is simply drawing the Lewis structure that will be your first resonance form. Then we know we want to move electrons, right. So which electrons are we going to move? We only move lone pairs or pi electrons. So we're never moving sigma electrons because that would be a single bond and we're never moving around atoms, right? So I always look to a lone pair or a double bond or triple bond to see which electrons we want to move and where will those electrons move to? They'll move towards SP and SP two atoms never sp three atoms and the electrons are usually going to move either to or from a charge. So to a positive charge or from a negative charge. Okay, that's not always the case, but it's definitely something to think about and keep your eye out for. And lastly, the total number of electrons and the net charge on your compound are always going to stay the same. All right. So we're not adding or removing electrons just simply taking them and moving them somewhere else. So let's go to our fennel myth ilium ion we were given and just as I mentioned, I see a charge next to a double bond, right charge next to double bond, not always the case but one of the most common cases of resonance. So since this is a positive charge, we're going to take the neighboring pi electrons and move those towards the positive carbon, right? That carbon needs some electrons drawing what say the same first. Now we have an exocet click double bond towards our CH two and our positive charge has moved into the ring. So for our third or second resident structure to our third resident structure, those pi electrons in the double bond move closer to the positive charge. So our positive charges moving clockwise around the ring for our fourth structure, pi electrons move oops down and we're moving those electrons in between those two carbons, right? Creating a new bond drawing what stayed the same first. So now our positive charges back next to that CH two group, which is now double bonded. So that is a methyl Ledeen group. And for our final resident structure, those pi electrons in the Meth Alauddin group will go back down into the ring and that positive charge will go back onto that carbon giving us CH two plus. So these are the five significant resonance structures for this compound which makes be the correct answer choice. That's it for this one. I hope this video is helpful and thanks for watching.

b. Draw the resonance contributors for anilinium ion.

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