Draw resonance structures for each of the following:
Hey guys, let's take a look at our compound. Now, it's a five membered ring where in that ring we have an oxygen atom right here and we have a double bond O up here, so we can indicate the lone pairs on both of these oxygens, we know it's going to have two sets of lone pairs per oxygen because it has two bonds plus those two lone pairs to give it six valence electrons, but this structure can actually have two different resonance structures possible, so let's just draw the backbone of this, right? With an O, O and same thing here, we have O and O. Now, I'm drawing it like that because notice that we actually have some resonance structures possible, one of them being that we could actually take this bond and use the electron to push them onto our oxygen. So, originally it had two lone pairs but now it has a third, the lone pairs on this oxygen are still here, but now we have some charges, we have a negative up top and a positive down here. So, again we have this charge and adjacent to it we have these lone pairs, so we can show that we could take these lone pairs and make a bond. So, in our final structure what's going to occur and what you'll see is that we have a negative charge on this oxygen up top, a PI bond right here, this oxygen only has five valence electrons, we're going to say it has a positive charge, we're going to say that oxygen up top has a negative charge, okay? So these are the three resonance structures possible for our compound and hopefully you guys were able to draw all of them right, showing our lone pair, PI bonds and charges appropriately. Alright guys, so let me know if you have any questions but I hope this made sense.