So here's another one. I hope that you guys were able to find 4 different types of bonds. Let's first of all talk about, I guess, the one that doesn't matter, which is C single bond C. We know that we see that around. But there are a few ones here that do matter. So for example, a new one that we had in this question is a C double bond C. Now remember that that gets its own signal. That's a double bond, so that would be in the double bond region. So that's something to hold onto. We'll do values in a second.
There was our sp3CH. That would be the entire alkane portion of this molecule. What's the 4th peak? Good job. So the 4th peak is actually going to be sp2CH. Why? Because there are 2 hydrogens on this molecule that are located on an alkene. Those hydrogens are going to have a higher wave number than the rest of the surrounding hydrogens. Why? Because they have a different hybridization. Now we have to talk about how many signals or how many different absorption frequencies do I need to state here? 3. We're not going to worry about the fingerprint. But what's the wave number that we have to memorize for an alkene? C C double bond, that would be 1600. We're just going to go with the value first of 16 as one stated value. It's a pretty sharp peak, so that's fine. For sp3CH, 2900. And lastly, for sp2CH. This should be easy if you remember that I just said it's going increase by 200 for each hybridization, so that means the sp2 would be 3,100. Got it? Awesome. So that was a little bit more tricky, but you guys got this. Let's move on to the last question.