You attempt to perform the bromination of trans -cinnamic acid shown below. You

Question

You attempt to perform the bromination of trans-cinnamic acid shown below. You decide to take an IR spectrum of your product and see a strong, broad signal at 3500 cm-1. Is this signal definitive proof of a successful reaction? (2 pts) select all that apply

No, because the IR spectrum of the starting material would have that stretch while the IR spectrum of the product would not

Yes, because the IR spectrum of the product would have that stretch while the IR spectrum of the starting material would not

No, because the IR spectra for both the starting material and product would have that stretch

Yes, because the IR spectrum of the starting material would have that stretch while the IR spectrum of the product would not

No, because the IR spectrum of the starting material would have that stretch while the IR spectrum of the product would not

Yes, because the IR spectrum of the product would have that stretch while the IR spectrum of the starting material would not

No, because the IR spectra for both the starting material and product would have that stretch

Yes, because the IR spectrum of the starting material would have that stretch while the IR spectrum of the product would not

Explanation / Answer

Answer:      No, because the IR spectra for both the starting material and product would have that stretch

Because carboxylic acid IR O-H stretching frequency is 3500 cm-1 since both the starting material and product would have that stretch. Hence this signal is not a definitive proof of a successful reaction.

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