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
How many moles of O2 are produced when 0.400 mol of KO2 reacts in this fashion? 4KO2+2CO2 ----> 2K2CO3+3O2


how trans uranium elements are seperated by solvent extraction

The ionization energy of hydrogen atom is -13.6eV.  The energy required to excite the electron in a hydrogen atom from the ground state to the first excited state is (Avogadro's co


how much glucose C6H12O6 you need to start with to prepare 4.6 times 10 to power 4 Kg of C2H5OH if the yield in the reaction is %64.5 C6H12O6+3O2= 4CO2+C2H5oh+3H2O

(a) Give short notes of two basic types of sewerage system for collection of wastewater and surface water from built-up areas. (b) Many countries have included wastewater reuse


Q. Determine the total ash content in flour? After undertaking this activity, you will be able to: • assess the mineral content in the given sample of flour, • check th

If there is a fire accident in an industry, what  a safety enginner will do? Ans) Fire engineering is the application of engineering and science principles to protect prope