Solve Spectroscopy Questions: Worksheet 6a & 6b - Get Help Now!

[srose9625]

I have done a few Spectroscopy questions already, However I am having troble with these last three problems. Any help would be GREAT!
Here is the link tothe spectroscopy questions.
On worksheet 6b, I need help on #1 and #2.
On worksheet 6a I need help on #4.

http://chemistry.usf.edu/faculty/data/weldegirma/files/worksheet6-2210L.pdf

 

[ace123]

Well I personally have no clue on the problem unless you can show us any work you have done on those problems...

 

[chemisttree]

C'mon!

6B, #1 is too easy. What functional group do you know of that will give you a sharp singlet (proton spectrum) way down at 11.5 ppm? Treat the group of peaks at 0.9 and 2.3 ppm as triplets and the absorbance at 1.6 ppm as a multiplet. The C13 spectrum has a carbon way down at 180 ppm. Four types of carbon are present.

#2 is also easy. You have a singlet way down at 11 ppm. Treat the absorbance at 1ppm as a doublet and the multiplet at 2.4 as a quartet. The C13 spectrum has a carbon way down at 205 ppm. Only three types of carbon are present in roughly a 2:1:1 ratio.

6A, #4 can be divined by the proton spectrum alone. Three carbons with three types of protons. One is a triplet at the typical place you find methyl groups next to methylene protons. Nuff said...