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

Okay for 6B #1 you have a proton signal at >10 which strongly suggests a caboxylic acid, the remaining 3 signals correspond to a 3 carbon fragment where all the protons are in different environments i.e. two triplets and a hextat (n+1 rule)

 

6B #2 you have a proton in the 9-10 range, strongly suggesting an aldehyde and the two reamining signals and 3 carbons, this means symmetry in the molecule so two signals are equivalent

 

6A #4 is very similar to 6B #1 except its a bromoalkane instead of the acid