You attempt to perform the bromination of trans -cinnamic acid shown below. You
ID: 501722 • Letter: Y
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
OH Br-Br: Br CO OH BrExplanation / 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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