After a proton is removed from the OH group, which compound in each pair forms a cyclic ether more rapidly?
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When (±)−2,3−dibromobutane reacts with potassium hydroxide, some of the products are (2S,3R)-3-bromobutan-2-ol and its enantiomer and trans-2-bromobut-2-ene.
Give mechanisms to account for these products.
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trans-2-bromobut-2-ene <IMAGE>