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Account for the following: (a) Lower m...

Account for the following:
(a) Lower members of alcohols are soluble in water but higher members are not.
(b) Alcohols cannot be used as solvent for Grignard reagent.

Text Solution

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(a) Alcohols are soluble in water because they form intermolecular hydrogen bonding with water. Lower membrane are completely miscible with water and the higher membrane are not. This is because of the increase in size of hydrophobic (water repealing) alkyl group in the alcohol.
(ii) Strong basic substances like organo metallic compounds (RMgX - Grignard reagent reagent) are decomposed by alcohol.
`R-OH + CH_(3)MgBr to R-O-Mg-Br + CH_(4)`
Hence, alcohols cannot be used as a solvent for Grignard reagent.
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