Consider the following molecule and answer the questions below: How many differe
ID: 838517 • Letter: C
Question
Consider the following molecule and answer the questions below:
How many different types of protons are present in this molecule?
On the structure above, indicate each different proton type by circling them and
numbering them.
How many different types of carbon atoms are present in this molecule?
How many degrees of unsaturation are present in this molecule?
Where would the benzene ring C=C stretching frequencies be found in the IR
spectrum of this compound?
Explanation / Answer
a - There ARE 4 types of protons
b -1 # H atom - CH3 group near to O atom
2 - 4- H atom of the benzene ring
3 - 2 H atom at the C connected to the benzene ring
4 - 3 H atom in the CH3 group near the CH2 attached to benzene
c - There are3 types of C present in the structure
d-
-1CH3 group near to O atom - 10 Carbon
2 - 4- C atom of the benzene ring - 30 Carbon
3 -C atom at the C connected to the benzene ring -20
4 -1 C atom in the CH3 group near the CH2 attached to benzene - 10
e - IR frequency is about 3100 cm-1