Grignard reagent is reactive due to___________________?
Correct answer: C. the polarity of C-Mg bond
- A. the presence of halogen atom
- B. the presence of magnesium atom
- C. the polarity of C-Mg bond
- D. all
Explanation
A Grignard reagent is reactive because the C-Mg bond is strongly polar, giving the carbon atom partial negative character and making it a powerful nucleophile. Students often choose magnesium because it is the distinctive metal in the reagent, but the bond polarity is what directly explains the carbon's reactivity.
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About Nucleophilic Addition Reactions
Nucleophilic addition occurs at the polar carbonyl group of aldehydes and ketones, where a nucleophile attacks the electron-deficient carbon atom. Reactions with hydrogen cyanide, sodium bisulfite, alcohols and Grignard reagents are explained through tetrahedral intermediates, acid or base catalysis, and the different reactivity of aldehydes and ketones.
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