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Solution: Epichlorohydrin is the common name of an industrial chemical...

Question

Epichlorohydrin is the common name of an industrial chemical used as a component in epoxy cement. The molecular formula of epichlorohydrin is C3H5ClO. Epichlorohydrin has an epoxide functional group; it does not have a methyl group. Write a structural formula for epichlorohydrin. 

Video Transcript

Alright everyone, so it's our job to draw the structural formula in this question for epichlorohydrin. Now, it gave us the molecular formula, right? It's C3H5ClO. Now, it gives us two pieces of information that will definitely help us draw the structural formula. Now, instead we have an epoxide, for those of you that don't know or don't remember an epoxide looks like this. Okay, this is the epoxide functional group. Now, remember what a methyl group is just a CH3, so we're going to say it has have to have an epoxide but it has no methyl group. Now, you may be thinking is this enough information to actually allow us to draw on the structural formula? Well, we don't know until we try, right? So, if we have an epoxide. Notice that this is going to take up two carbons. Now, instead we need no methyl groups, so we know we have to add another methyl group coming off of one of these positions and we wouldn't add the chlorine group over here, because we still have the methyl and let's do this in a different color, so our options to add our methyl would be right here, or excuse me, our chlorine would be in the green, we could add it in the red or we can add it at the black position, which one do you think? Well, only one of them allows us to get rid of the methyl, it's going to be black, okay? So we're going to take our chlorine and add it right here, because what that does is we fill in all of our hydrogens, we now have two right here, right? So we no longer have a methyl group, we have one right here and we have two over here, so we have five hydrogens in total, we have three carbons and oxygen and a chlorine, so let's go ahead and actually write the structure formula and showing our carbon atoms, we have a carbon that's a CH2, so we're going to say carbon two carbon, we have bonds to oxygen, we have two hydrogens coming off of here, we have one hydrogen coming off of this carbon and then we have a CH2Cl. Alright, so we did, we actually drew the structural formula for epichlorohydrin remembering the two key parts of this was. Remember, when the epoxide was and then figuring out where to add our chlorine group, so that we could get rid of our methyl. Alright, so I hope that makes sense, let me know if you have any questions.