Which one of the following heptanols can be dehydrated to hept-3-ene o...
Overview:
To determine which heptanol can be dehydrated to hept-3-ene only, we need to consider the position of the hydroxyl group (-OH) in each heptanol molecule. Dehydration of an alcohol involves the removal of a water molecule, resulting in the formation of an alkene. The position of the double bond in the alkene depends on the location of the hydroxyl group in the starting alcohol.
Explanation:
Heptan-3-ol:
- In heptan-3-ol, the hydroxyl group is attached to the third carbon atom.
- When dehydrated, heptan-3-ol can form two different products: hept-3-ene (major product) and hept-2-ene (minor product) due to the possibility of forming a double bond at either the second or third carbon atom.
Heptan-4-ol:
- In heptan-4-ol, the hydroxyl group is attached to the fourth carbon atom.
- When dehydrated, heptan-4-ol can form two different products: hept-3-ene (major product) and hept-4-ene (minor product) due to the possibility of forming a double bond at either the third or fourth carbon atom.
Heptan-2-ol:
- In heptan-2-ol, the hydroxyl group is attached to the second carbon atom.
- When dehydrated, heptan-2-ol can form two different products: hept-2-ene (major product) and hept-3-ene (minor product) due to the possibility of forming a double bond at either the second or third carbon atom.
Heptan-1-ol:
- In heptan-1-ol, the hydroxyl group is attached to the first carbon atom.
- When dehydrated, heptan-1-ol can form two different products: hept-1-ene (major product) and hept-2-ene (minor product) due to the possibility of forming a double bond at either the first or second carbon atom.
Conclusion:
Based on the information above, only heptan-4-ol can be dehydrated to hept-3-ene only. In this case, the hydroxyl group is attached to the fourth carbon atom, allowing for the formation of a double bond at the third carbon atom during dehydration. The other heptanols have the hydroxyl group attached to carbon atoms that can potentially form double bonds at different positions, resulting in the formation of multiple products.
Which one of the following heptanols can be dehydrated to hept-3-ene o...
Hiii Fazal I think answer should be A heptan-3-ol as after drawing structure I applied the rule in which we see the no of substituents and do accordingly(foregetting the name of the rule) and I saw that heptan-4-ol is able to form hept-3-ene and hept-4-ene with same speed while in A only one structure is favourable and that this Heptan-3-ene.... Regards..
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