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1)For the following reaction sequence (it is not necessary to understand the che

ID: 884746 • Letter: 1

Question

1)For the following reaction sequence (it is not necessary to understand the chemistry) what significant change(s) would be expected by IR (ignoring C-H absorptions)?

None of these choices

2)For the following reaction sequence (it is not necessary to understand the chemistry) what significant change(s) would be expected by IR (ignoring C-H absorptions)?

None of these choices.

3)For the functional group(s) on the following molecule, what characteristic IR absorption(s) would be expected (ignoring C-H absorptions)?

None of these choices.

Please provide explanations! thank you in advanced.

A peak around 3300 cm-1 would disappear and nothing new would appear. OH pCC

Explanation / Answer

1. A new peak around 1710 cm-1 would appear and a peak around 3300 cm-1 would disappear.

In IR -oH gives absorbtion at 3300 cm-1 , In reaction -OH converts in to -C=O gives absorbtion at 1710 cm-1.

2. A)A peak around 1710 cm-1 would disappear and a new peak around 3300-3500 cm-1 would appear.

3. peaks around 1650 and 3300 cm-1