I wanted to find out how other people interpreted their NMR spectra. Dr.
Fryhle mentioned that we were not to worry about the s, d, t, and q
designations to the C-13 NMR spectra in the book. I used these as part of
my interpretation-- for example a singlet C (as Gabe defined) is part of a
carbonyl group in the carvone molecule. I therefore labeled the "s" peak
in the "ketone" region of the spectra with a letter and labeled the
corresponding carbon in the molecular representation with that same
letter. I also saw that there were two singlet peaks in the alkene region
of the spectra so I labled those two peaks and the two singlet carbons in
the molecule that were part of C-C double bonds with corresponding
letters. I used the s, d, t, and q designations from the book but used the
NMR spectra from the lab window...
chase
On Mon, 17 Mar 1997, Gabriel D. Charbonneau wrote:
> 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
> >
> >
>
>