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(D) The reaction is the acid-catalyzed dehydration of an alcohol using $H_3PO_4$ and heat.$1.$ It is a dehydration reaction as a water molecule is rem

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$1, 3, 4$

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(D) The reaction is the acid-catalyzed dehydration of an alcohol using $H_3PO_4$ and heat.$1.$ It is a dehydration reaction as a water molecule is removed.$2.$ The mechanism is $E_1$,not $E_2$,as it involves the formation of a carbocation intermediate.$3.$ The reaction involves a $1,2-methyl$ shift (carbon skeleton migration) to form a more stable carbocation.$4.$ The major product is the most stable alkene (the one with more $\alpha-hydrogens$,i.e.,$12 \alpha-H$ in this case).$5.$ It is a multi-step reaction involving carbocation formation and rearrangement.Therefore,statements $1, 3,$ and $4$ are correct.

Consider the following reaction:
Which response contains all the correct statements about this process?
$1.$ Dehydration
$2.$ $E_2$ mechanism
$3.$ Carbon skeleton migration
$4.$ Most stable alkene will form
$5.$ Single-step reaction

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Consider the following reaction:Which response contains all the correct statements about this process?$1.$ Dehydration$2.$ $E_2$ mechanism$3.$ Carbon skeleton migration$4.$ Most stable alkene will form$5.$ Single-step reaction