Re: carbon-13 NMR
Gabriel D. Charbonneau (charbogd@plu.edu)
Mon, 17 Mar 1997 16:48:09 -0800 (PST)
Terra,
I know Dr. Fryhle said that we don't need to know what singlets,
doublets, triplets, and quartets are, but Chason and I spent a long time
figuring it out and I just thought I would share with inquiring minds. A
peak that is a singlet is representing a carbon in the structure that has
no hydrogens attached to it. A doublet represents a carbon with one
hydrogen attached, a triplet is a carbon with two hydrogens, and a quartet
is one with three. The designations singlet, doublet, etc... refer to the
number of nuclei ie. A doublet represents two nuclei: one carbon and
one hydrogen.
For an example of how this is useful in interpreting NMR spectra
look at the figure on page 117 Pavia et al. The two quartets represent
the two CH3 groups in the carvone molecule.
Gabe
On Mon, 17 Mar 1997 bobbtl@plu.edu wrote:
> In the NMR spectrum of carvone on pg. 117 of Pavia et al, what does the
> s=singlet, d=doublet, t=triplet, q=quartet refer to exactly and should
> this be taken into consideration when labeling our spectrum?
>
> Terra
>
>