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# If there's a triplet does it mean there are 2 adjacent carbons?

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1. Can someone explain this? HOW many adjacent carbons on singlet and doublets?
Can you explain how to use the (n-1) rule?
2. ermm, pretty sure any elememtary physical textbook or NMR textbooks would teach you this in the first couple of pages.
3. It's not to do with the number of carbons - its the number of hydrogens coming off the adjacent carbon, + 1 to the number and that gives you the amount of splitting in that peak.

If the adjacent carbon has 0 hydrogens, add 1 and you get 1. So the peak will just be a singlet and appear as a single line with no splitting.

If the adjacent carbon has 1 hydrogen, add one and you get 2. So the peak will split into 2, and is called a doublet.

And so on...
4. (Original post by shengoc)
ermm, pretty sure any elememtary physical textbook or NMR textbooks would teach you this in the first couple of pages.
why even comment?....
5. (Original post by clad in armour)
why even comment?....
the whole idea of the forum is to direct people in difficulties where to look and that was exactly what i did.
6. (Original post by Abbers)
Can someone explain this? HOW many adjacent carbons on singlet and doublets?
Can you explain how to use the (n-1) rule?
if there are hydrogens bonded to adjacent carbon atoms then the peak will split into n+1 peaks where n is the number of hydrogens on the adjacent atoms. The ratio of peak heights is determined by Pascal's triangle.

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