The following alkenes can be prepared by dehydration of an appropriate alcohol. Show the structure of the alcohol in each case that would provide the alkene shown as the major product.
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Verified step by step guidance

1. Identify the alkene structure from the image provided.
2. Recall that dehydration of alcohols involves the removal of a water molecule (H2O) to form an alkene.
3. Determine the position of the double bond in the alkene structure, as this will guide the placement of the hydroxyl group (OH) in the alcohol.
4. Consider the Zaitsev's rule, which states that the more substituted alkene is usually the major product in dehydration reactions.
5. Draw the structure of the alcohol by adding an OH group to the carbon atom that will lose the hydrogen during the dehydration process, ensuring that the resulting alkene matches the given structure.

Key Concepts

Dehydration Reaction

A dehydration reaction is a chemical process where a water molecule is removed from a compound, typically resulting in the formation of a double bond. In organic chemistry, this often involves the conversion of alcohols into alkenes. Understanding this reaction is crucial for predicting the products formed when an alcohol undergoes dehydration.

Alcohol Structure

Alcohols are organic compounds characterized by the presence of one or more hydroxyl (-OH) groups attached to a carbon atom. The structure of the alcohol significantly influences the outcome of the dehydration reaction, as the position of the hydroxyl group and the carbon skeleton determine the major alkene product formed. Identifying the correct alcohol structure is essential for synthesizing the desired alkene.

Zaitsev's Rule

Zaitsev's Rule states that in elimination reactions, the more substituted alkene is typically the major product. This principle helps predict which alkene will be favored during the dehydration of alcohols. Understanding this rule is important for determining the structure of the alcohol that will yield the specified alkene as the major product.