The halide shown is converted to its Grignard reagent with magnesium in dry ether; propanone (acetone) is added, followed by $H X_{3} O X^{+}$ . Which structure is the product?

AStructure A
BStructure B
CStructure C
DStructure D

Answer: B

The isobutyl carbanion adds to the ketone carbon; hydrolysis gives a tertiary alcohol, 2,4-dimethylpentan-2-ol. The secondary alcohol 4-methylpentan-2-ol is the ethanal product, and the ketone is not formed.

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The halide shown is converted to its Grignard reagent with magnesium in dry ether; propanone (acetone) is added, followed by HX3​OX+. Which structure is the product?

Answer: B

More questions on Grignard reagent products from drawn halides

The halide shown is converted to its Grignard reagent with magnesium in dry ether; propanone (acetone) is added, followed by $H X_{3} O X^{+}$ . Which structure is the product?