I have two questions based on the 1H and 13C NMR. I will post the 2 graphs in ca

ID: 1052361 • Letter: I

Question

I have two questions based on the 1H and 13C NMR. I will post the 2 graphs in case if you need them in answering the 2 questions.

1) What conclusion can be drawn from the following about the structure of styrofoam?

a- it is insoluble in concentrated sulfaric acid

b- it does not react with bromine in methylene chloride or aqueous potassium permanganate.

2) What peaks in the IR spectrum of polystyrene indicate,

a- aliphatic C-H streaching?

b- aromatic C-H straching?

c- the presence of benzene ring?

d- the C6H5 group (monosubstituted benzene)?

e- attributed to CH2 bending?

2Q.

a- aliphatic C-H stretching = 2850

b- aromatic C-H stretching = 3027

c- the presence of a benzene ring = 1601

d- the C6H5 group (monosubstituted benzene) = 906

e- attributed to CH2 bending = 1430