For the following reaction, which of the following change(s) in the IR spectrum is consistent with conversion of the reactant to the product?
a. absorption at 2150 cm -1 should disappear
b. absorption at 3300 cm -1 and 2150 cm -1 should disappear
c. absorption at 2250 cm -1 should disappear, a new absorption at 3300 cm -1 should appear
d. absorption at 1650 cm -1 should disappear, a new absorption at 3300 cm -1 should appear
e. absorption at 3300 cm -1 and 2150 cm -1 should disappear, a new absorption at 1720 cm -1 should appear
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