High School

Since a Grignard reagent contains a carbon atom with a partial negative charge, it acts as a base and reacts with the OH group of the starting halide, BrCH\(_2\)CH\(_2\)CH\(_2\)CH\(_2\)OH. This acid-base reaction destroys the Grignard reagent, preventing addition from occurring.

Answer :

The Grignard reagent acts as a nucleophile and reacts with the OH group in the starting halide. This acid-base reaction destroys the Grignard reagent, preventing further addition reactions.

I summarized the key points of the process. To elaborate, the Grignard reagent, which contains a carbon atom with a partial negative charge, is highly reactive and acts as a nucleophile. It attacks the electrophilic carbon in the halide compound, displacing the halogen atom and forming a carbon-carbon bond. However, in the presence of an alcohol (OH) group, an acid-base reaction occurs. The Grignard reagent donates its electron pair to the proton of the OH group, resulting in the formation of an alcohol. This reaction consumes the Grignard reagent, preventing further addition reactions from taking place.

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