Integration | Spectroscopy | Organic chemistry | Khan Academy
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- Опубликовано: 16 сен 2024
- How the area under each proton NMR signal can tell us the number of protons in a certain chemical environment. Created by Jay.
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Organic Chemistry on Khan Academy: Carbon can form covalent bonds with itself and other elements to create a mind-boggling array of structures. In organic chemistry, we will learn about the reactions chemists use to synthesize crazy carbon based structures, as well as the analytical methods to characterize them. We will also think about how those reactions are occurring on a molecular level with reaction mechanisms. Simply put, organic chemistry is like building with molecular Legos. Let's make some beautiful organic molecules!
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Can anyone explain to me why the division of integration number is multiplied by 2 (which results in total 10 proton)? Where did that "2" factor come from? Thank you very much.
It's just logic. You need even numbers for the integration because you can't just have half a proton. And since we have ten hydrogens in a molecule, we use 2. If we had 20 hydrogens, we would have used 4. You just multiply it the way it fits., since the integration only gives you the intensity relation of the proton signals.
multiply all integration numbers by a whole number until the sum of them equals the number of hydrogens
helpful! thx a lot
But how would you know that there is ten protons to begin with given that when you're doing spectroscopy the whole point is trying to determine the shape? If you know the formula can't you determine the shape without the test?
No you cant. The formula for this molecule (Benzylacetate) is C9 H10 O2. But you could connect these atoms completly differently. You could make Ethyl benzoate or Acetanisole out of the same atoms.
so I have 1.15, 3.1, 5,92 and the result is 9. but I know the formula to be C5H10O2, whats wrong?
round the numbers to: 1, 3 and 6 respectively and u have a total of 10 ^^