Concept:Grignard reagents react with dry ice, followed by hydrolysis, to give carboxylic acids.
Explanation:Isopropyl magnesium chloride is a Grignard reagent with the structure
(CH3​)2​CHMgCl.
Dry ice is solid carbon dioxide,
CO2​.
The Grignard reagent attacks the carbon of
CO2​, forming a magnesium salt of a carboxylic acid.
The reaction proceeds as:
(CH3​)2​CHMgCl+CO2​→(CH3​)2​CHCOOMgClOn hydrolysis, this magnesium salt is converted to the corresponding carboxylic acid:
(CH3​)2​CHCOOMgCl+H2​O→(CH3​)2​CHCOOHThe product
(CH3​)2​CHCOOH is named 2-methylpropanoic acid.
Therefore, the correct option is C.
Answer:C. 2-Methylpropanoic acid