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The reaction of a Grignard reagent, [tex]C_2H_5MgBr[/tex], with [tex]C_8H_8O[/tex] followed by hydrolysis gives compound A, which reacts instantly with Lucas reagent to give compound B ([tex]C_{10}H_{13}Cl[/tex]).

What is compound B?

Answer :

Final answer:

A multi-step organic synthesis involving a Grignard reagent and the Lucas reagent leads to a secondary or tertiary alcohol that reacts to form a chloroalkane, compound B.

Explanation:

The question pertains to a multi-step organic synthesis problem involving a Grignard reaction followed by a reaction with Lucas reagent. When C2H5MgBr reacts with C8H8O, an alcohol (compound A) is formed due to nucleophilic addition to a ketone or aldehyde, followed by protonation during hydrolysis. Compound A reacts immediately with Lucas reagent to form compound B (C10H13Cl), which suggests that compound A must be a secondary or tertiary alcohol for it to react quickly, as primary alcohols react slowly with Lucas reagent. The instant reaction indicates a highly reactive alcohol that, when treated with Lucas reagent, undergoes a nucleophilic substitution to form the corresponding chloroalkane, which in this case is compound B.

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