Spectroscopy, Chemistry

Spectroscopy:

1. Run IR spectra on both of your purified products and on pinacolone.

Comment on any features of interest, including the C=O stretch frequencies.

2. Obtain, and interpret, electron-impact induced mass spectra of both products.

3. Obtain 1H and 13C nmr spectra of both products, as solutions in CDCl3.
(Remember that, in DEPT 90 and 135 spectra, peaks which ‘should' vanish, when compared with the CH decoupled spectrum., may not do so completely. If they are present, they will be present at very greatly reduced intensity, however.)

(a) Interpret the spectra of the enone, from Stage 1, as thoroughly as you can. Establish the compound's stereochemistry using the coupling constant associated with the splitting of the 1H nmr resonance of the vinyl protons. Use resonance arguments to explain why the α-vinyl proton is more deshielded than its β-vinyl counterpart.

(b) Use the integrations in the 1H nmr spectrum of the Stage 2 product to establish the relative numbers of protons resonating at the various chemical shift values. Which resonance (integration and multiplicity) corresponds to the t-butyl group?

Which resonance (integration and multiplicity) corresponds to the CH part of the isopropyl group?

Which two resonances (integration and multiplicity) correspond to the two isopropyl methyl groups

Posted Date: 2/11/2013 6:47:54 AM | Location : United States







Related Discussions:- Spectroscopy, Assignment Help, Ask Question on Spectroscopy, Get Answer, Expert's Help, Spectroscopy Discussions

Write discussion on Spectroscopy
Your posts are moderated
Related Questions
what technique can be used to improve water quality ?

Q. Illustrate about Borohydrides? Borohydrides like NaBH 4 ,, Be(BH 4 ,) 2 and Al(BH 4 )are the salts of complex  tetrahydridoborate anion, BH - 4 ,. Since in BH - 4 ,. bor

Protein classification on the basis of size

Silicon has 4 electrons in the outermost orbit. In forming the bonds: (1) It gains electrons (2) It loses electrons (3) It shares electrons (4) None of these Ans: I


What aspects of amino acid structure are involved in the formation and stabilisation of beta-sheets in proteins? Start with a paragraph that describes important basic informatio

D BLOCK ELIMENT

Gold has a molar mass of 197g/mol. How many atoms are in the sample?Please give me procedure also. Ans) molecular wieght of gold is 197 g 1mole/g of molecule is occupies t

The de-Broglie wavelength of a particle with mass 1gm  and velocity  100m/ sec is: (1) 6.63 x 10 -53 m                             (2) 6.63 x 10 -34 m                (3