Test: MCAT Biology

1.

Cyclohex

Students in an organic chemistry lab perform two E2 elimination reactions, using compounds 1 and 2. The students observe that while compound 2 undergoes elimination with reagent X (not shown), compound 1 is unreactive. What is the best explanation for this discrepancy?

Compound 1 is too sterically hindered

Bromine is not a good enough leaving group

Reagent X is more selective for compound 2 than for compound 1

Compound 1 has no hydrogen molecules anti-periplanar to the bromine leaving group

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