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Solution: Draw resonance structures for each of the following:...

Question

Draw resonance structures for each of the following:

Video Transcript

Hey guys, let's draw a resonance structure for our compound we're not going to look something like this, we have a nitrogen in that bond there then we need to show where our lone pairs are, so they're going to be right here on our nitrogen, so it has a total of five valence electrons. Now, let's analyze this, we have a PI bond between two different atoms. Now, one of them is a carbon atom and the other one is a nitrogen atom. Now, notice that if you think of your electronegativity there's going to be differences between the net electronegativity of that carbon atom and that nitrogen atom, so we can actually show a resonance structure here, okay? Now, that resonance structure, we can show that this pi bond is actually going to kick the electron onto this nitrogen, right? So, as a result we should expect, let's just draw this original structure right here, we should expect that our nitrogen, it had that original blue lone pair, but now it's going to gain the electron from this pi bond and to indicate that we can actually show this is exactly where those electrons came from but now we know there's going to be some kind of charges involved, so let's take a look. Now, the negative charge is going to reside on that nitrogen atom because take a look it has more valence electrons than it wants, so we're going to say that this nitrogen atom has a negative charge and originally, let's draw in, let's say red, right? That there was one hydrogen here, right? Because that carbon only had three sigma bonds or three bonds to it, right? Was connected to that nitrogen in that other carbon, so there was one hydrogen there and there's going to be one hydrogen here, so that means this carbon is going to have a positive charge. Alright guys, so this is your resonance structure and I hope that made sense.