COMEDK · Chemistry · 26. Alcohols Phenols and Ethers
Choose the correct reason:
o-hydroxybenzaldehyde is a liquid at room temperature while \(p\)-hydroxy-benzaldehyde is a high melting solid, because
- A p-hydroxybenzaldehyde, shows intramolecular hydrogen bonding while in o-hydroxy benzaldehyde there is stronger intermolecular hydrogen bonding
- B o-hydroxybenzaldehyde shows association of the molecules while in \(p\)-hydroxy benzaldehyde there is no association among the molecules
- C o-hydroxybenzaldehyde shows only weak Vanderwal's forces of attraction while in \(p\)-hydroxy benzaldehyde there is strong Vanderwal's forces of attraction in solid state
- D o-hydroxybenzaldehyde shows intramolecular hydrogen bonding while in \(p\)-hydroxy benzaldehyde there is no intramolecular hydrogen bonding
Answer & Solution
Correct Answer
(D) o-hydroxybenzaldehyde shows intramolecular hydrogen bonding while in \(p\)-hydroxy benzaldehyde there is no intramolecular hydrogen bonding
Step-by-step Solution
Detailed explanation
o-hydroxybenzaldehyde exhibits intramolecular hydrogen bonding due to the proximity of the -OH and -CHO groups. This restricts the formation of intermolecular hydrogen bonds, resulting in weaker intermolecular forces and making it a liquid at room temperature. In…
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