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Ch.10 - Chemical Bonding II: Molecular Shapes & Valence Bond Theory

Chapter 10, Problem 88b

The structure of acetylsalicylic acid (aspirin) is shown here. How many sigma bonds?

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Hello everyone. So in this video we're counting the total number of sigma bonds present in the structure of caffeine. So first thing to notice is that we only have single bonds and double bonds present for a single bond That's automatically 1 σ bond. As for our double bond It contains one sigma bond and one pi bond. So let's go ahead and start counting. Then starting off with this CH three group. So we have 123 connecting the carbon and nitrogen. We have another one so that's four. Then we can go ahead and move on to this ring here. Then We have nine and 10 for the double bonds here we have 11 and 12. Moving on to this bottom, We go ahead and start counting, we left off at 12. So we have 13, 14, 15 and 16. Moving on to this five memory Can say 17, and 20 This one Ch branch that's 21 then. And the last CH three group We have 22, 23 24 and 25. So the total number of single bonds present and caffeine is going to be sigma bonds. Alright and this is going to be my final answer for this question. Thank you all so much for watching
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