[robert_l]

hello,

please could someone explain the significance of the peak heights in carbon-13 nmr spectra? i read that there are not simple explanations, but if possible, please keep it simple.

i've got a coursework question telling me to comment on why a peak is smaller than another.

so, in what circumstance is peak height affected?

thanks in advance.

[nj_bartel]

I'm pretty sure higher peak = more attached hydrogens

[ARGOS++]

Dear nj_bartel;

According to my reference (in German) it is not true that the signal intensities correlate with the number of attached hydrogens.  Otherwise you would not see some carbons of polyaromatic compounds!

The reference tells that it more correlates with the number of carbons (similar to hydrogen in ¹H), but much less accurate, and with a lot of exceptions.

Sorry I don’t own more relevant info about.
Good Luck!
                    ARGOS⁺⁺

[robert_l]

Many thanks.

[rita87]

I agree with nj_bartel.  I have a few literatures telling that peak height depends on Hydrogen atoms. It doesn't mean that Carbon without Hydrogen has no peak, It means that Carbon with no Hydrogen is smaller than those with Hydrogen attached to them.