The Following Compound Was Treated with the Following Sequence of Reagents

question 25

Multiple Choice

The following compound
was treated with the following sequence of reagents
1. HBr, H₂O₂
2. Li, ether
3. Formaldehyde, followed by H₃O⁺
4. CrO₃, pyridine
5. Ph₃P=CH₂
Which of the following absorptions would you not expect to see in the IR spectrum of the final product of this multistep synthesis?

• A) C=O stretch
• B) C-O stretch
• C) C=C stretch
• D) C-H stretch
• E) a and b

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Definitions:

Neuron

Morphologic and functional unit of the nervous system, consisting of the nerve cell body, the dendrites, and the axon; also called nerve cell.

Synaptic Vesicles

Small organelles within neurons that store and release neurotransmitters at the synapse.

Neurotransmitters

Chemicals released by neurons to transmit signals across a synaptic gap to a target cell.

Presynaptic Terminals

The ends of axons where neurotransmitters are stored before being released into the synaptic cleft in response to a nerve impulse.