So first, I'm just going to go over the rankings in order and then I'll go over each individual chemical shift just to reinforce what we just learned. So our highest number, our most deshielded, is going to be H5. Because H5 is on a double bond, it has the highest range as you can see above. It's going to go from H5. Then what's the one with the next highest number? That's actually going to be H2 because H2 is directly attached to a carbon that has fluorine, the most electronegative atom on it. That would be an example of ZCH. So that one's going to come in next. So H5 was a double bond. H2 is ZCH. Okay. So then after that, what I'm going to get is H3 because H3 is on a triple bond and remember that a triple bond results a little bit lower than a fluorine would result, then what we would get is H4 because if you notice, H4 is actually allyl. This would be an example I'm just going to erase this and move it up a little bit. Now allyl is actually on the lower side of Z but it still counts. That's allyl. And then finally, we would end up with H1 at the bottom because it's nothing. All it is just CH. It's just an alkane. Hopefully that made sense so far.
Now let's go over the exact chemical shifts. Now, something that I neglected to mention in the previous example when I showed you guys the spectrum is that chemical shifts are actually denoted by a Greek symbol. And this Greek symbol is the lowercase delta. So, lowercase delta is the same thing as saying parts per million. Okay? So I'm just going to put all of the different parts per million here. What I would expect for H5 is that it's somewhere between 4.5 and 6. We'll just give it a shift of 5. What we would expect for H2 is that it's on the top range of ZCH because there's a Fluorine present, so I'm going to say that one's 4, around 4. Then for H3, since it's on a triple bond, it's somewhere between 2.5 and 3. We'll just give it a chemical shift of 3. Make it easy. Now for H4 because it's allyl, this is going to be around 2. Remember, I said that usually they're a little bit below 2. So you know what? Even though I could make it easy, I could say 2. I'm just going to be a little bit more accurate. I'll say that it's like 1.9 because usually it's right below 2. Okay? And then finally we have H1 which it's secondary, so it's actually probable not going to be 1.0. It's probably going to be a little bit more in the middle, probably something a little bit more like 1.4. Okay? So I got a little bit tricky at the end. Sorry if I'm blocking that a little bit. I'm not trying to trick you guys or anything. I'm just trying to show you guys kind of the way this works, the general trend. And that a lot of times you are going to see little fluctuations with these values. And the biggest point isn't to argue over 3.94. It's to memorize and understand kind of the general idea of what's going on. One more note about these values that I taught you. It might be in your best interest to learn these values because the sheet that you get on your exam in case your professor is just giving you these shifts, right? There are some professors that really don't care for you to memorize. They just give them to you. You might not understand them the same way that you understand them here, on the sheet that you get. Sometimes, it's just better to learn it anyway and then you can go into your exam more confident. So I'll leave that one up to you, guys. But anyway, that being said, let's go ahead and move on to the next topic.