NMR

Question 1

number of resonance/signals

Answer 1

number of unique hydrogens

Question 2

predicted integration

Answer 2

number of hydrogens on that C

Question 3

splitting pattern/multiplicity

Answer 3

number of hydrogens on neighboring C
Name would be n+1
Ex. 2 neightboring would be triple

Question 4

higher ppm = more halogen atoms

Question 5

isolated ethyl group

Answer 5

quartet (2H) with triplet (3H)

Question 6

isolated isopropyl group

Answer 6

septet with doublet

Question 7

isolated tert butyl group

Answer 7

1 peak with 9H written by it

Question 8

rules to analyze NMR

Answer 8

1. find MF
2. find degrees of Un
3. look at number of signals and integration of each signal
   - take integration heights and divide by smallest number
   - multiply by 2 to get full number
4. draw out fragments
   - recognize ethyl, isopropyl, tert butyl
5. assemble fragments

Question 9

degrees of U

Answer 9

U=0, no pi bonds or rings
U=1, 1 ring or 1 pi bond
U=4, ring
* for every degree of U, lose 2 H