00:01
In this problem, you're given a structure with a negative charge on carbon, next to a carbonyl, and then we have a carbon chain coming off of this.
00:11
And we're asked here to draw the resonance structure.
00:15
So this is going to be something that has the same attachments, but we can have pi electrons in different places.
00:22
So what we need to recognize is that when a carbon has a negative charge, like we see here, that means that the carbon has three bonds, which we see, and then a lone pair on it.
00:34
And that's why we have our negative charge.
00:37
So if we put in our lone pair, well, you can imagine that these could drop in here.
00:44
The only problem is that means five bonds to this carbon, which we know violates the octet rule...