# Organic chemistry problem??

Please help, I have absolutely no idea what to do. I thought X was 3-Chloro-2-methylhexane and Y was 2-Bromo-2-methylhexane but it says I'm wrong.
Compounds X has the formula C7H15Cl; Y is C7H15Br.
X undergoes base-promoted E2 elimination to give a single alkene product Z. Y likewise reacts under similar...
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Please help, I have absolutely no idea what to do. I thought X was 3-Chloro-2-methylhexane and Y was 2-Bromo-2-methylhexane but it says I'm wrong.

Compounds X has the formula C7H15Cl; Y is C7H15Br.

X undergoes base-promoted E2 elimination to give a single alkene product Z. Y likewise reacts under similar conditions to give a single alkene product that is isomeric with Z

Catalytic hydrogenation of Z affords 3-ethylpentane.

X readily reacts in SN2 fashion with sodium iodide in acetone. Y does not undergo a similar SN2 reaction. Propose structures for X and Y.

Compounds X has the formula C7H15Cl; Y is C7H15Br.

X undergoes base-promoted E2 elimination to give a single alkene product Z. Y likewise reacts under similar conditions to give a single alkene product that is isomeric with Z

Catalytic hydrogenation of Z affords 3-ethylpentane.

X readily reacts in SN2 fashion with sodium iodide in acetone. Y does not undergo a similar SN2 reaction. Propose structures for X and Y.

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