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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: Beetle on November 06, 2005, 02:15:56 AM

Title: NMR - predicting splitting pattern
Post by: Beetle on November 06, 2005, 02:15:56 AM

I'm really just having trouble interpreting this question:

Predict the splitting pattern for H3 of 4,4-dimethyl-2-pentanol.

I just dont know which H they are talking about.

Apparently the answer is it is doublet.

Title: Re:NMR - predicting splitting pattern
Post by: Yggdrasil on November 06, 2005, 05:13:46 AM

They're talking about the H on carbon #3.  Please review organic nomenclature in your organic text if you do not know which carbon is carbon #3.

Title: Re:NMR - predicting splitting pattern
Post by: sdekivit on November 06, 2005, 05:23:25 AM

looking at the 3rd C-atom we see a proton with only one H at three bonds distance --> only 1 proton is involved in the splitting pattern --> doublet.

Title: Re:NMR - predicting splitting pattern
Post by: Beetle on November 06, 2005, 04:31:23 PM

Thankyou everyone,
it all makes sense now  :)