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Alcohols, Phenols and Ethers

Short Answer Type

181.

Write the structures of the compounds whose IUPAC names are given below:
2, 3-Diethylphenol.

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182.

Write the structures of the compounds whose IUPAC names are given below:
2-Ethoxy- 3-methylpentane

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Long Answer Type

183.

Give the structural formulas and IUPAC name of the isomers of C₇H₈O containing benzene ring.

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Short Answer Type

184. Give the structures and IUPAC names of the products expected from the following reactions:
(a)    Catalytic reduction of butanal.
(b)    Hydration of propene in the presence of dilute sulphuric acid.
(c)    Reaction of propanone with methyl magnesiumbromide followed by hydrolysis.

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185. Arrange the following sets of compounds in order of their increasing boiling points:
Pentan-1 -ol, butan-1-ol, butan-2-ol, ethanol, propan-1-ol, methanol.

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186. Arrange the following sets of compounds in order of their increasing boiling points:
Penta-1-ol, n-butane, pentanal, ethoxyethane.

Pentan-1-ol molecules are associated with extensive hydrogen bonding, therefore, the boiling point of pentan-1-ol would be highest. Pentanal is more polar than ethoxyethane. Therefore, the intermolecular dipole -dipole attraction is stronger in the former. n-butane is have only weak vander waals forces. Hence increasing order of boiling points of the given compounds is as follows:

n-Butane< ethoxyethane< pentanal< penta-1-ol.

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