Question 4 Question 3 Dec 4 at 6:31pm Instructions am covers chapters 17-21. Be

Question

Question 4 Question 3 Dec 4 at 6:31pm Instructions am covers chapters 17-21. Be sure and read this material before you take t Which nucleophile would you expect to add reversibly to an á unsaturated carbonyl? Which of the following alkyl halides could not be used to generate a Wittig reagent? O CH3Li Question 1 NaCN which of the following correctly explains whyUAH4 is a stronger reducin: 0 NaBH4 NaBH4? LIAIH4 1MG-0608.JPG O LIAIH4 has less steric hindrance than NaBH4. O The electronegativity of Li ls higher than that of Na. O The electronegativity difference between Li and H is greater than Search between Na and H O The electronegativity of Al Is lower than that of B. Question 2 Hydrogen has a greater partial positive charge in LiAIH4 than in Na Which of the following is the correct order of reactivity for this set of nucleophiles Question 2 (CH3CH2)2Culi > CH3CH2u» CH3CH2MgBr Which of the following is the correct order of reactivity for this set of newSNAR.. MacBook Air

Explanation / Answer

Question 1: The electronegativity of Al is lower than that of B. option 4 is correct.

Question 2: The order of reactivity is: CH3CH2Li > CH3CH2MgBr > (CH3CH2)2CuLi

Explanation: organolithium reagents are more reactive due to more electropositivity if Li metal. organocopper reagents are least reactive.

Question 3: option 3 is cannot be used to prepare wittig reaction.

Explanation: Wittig reaction invovles SN2 mechanism. tertiary alkyl halides does not give SN2 mechanism.

Question: 4: NaCN adds reversibly to alpha, beta-unsaturated carbonyl compounds.

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