QUESTION 1 Arrange the leaving groups in order of increasing leaving group abili

Question

QUESTION 1 Arrange the leaving groups in order of increasing leaving group ability (i.e., poorest leaving group first) CI IV O IV, I, llI, II O IlI, I, IV, II O II, IV, I, III O II, III, I, IV QUESTION 2 Which of the following would you expect to have the weakest C-X bond (or which would have the best leaving group)? o CH3CH2Cl O CH3CH2Br O CH3CH2F O CH3CH2l O (CH3)2 CHBr QUESTION 3 Which of the following would you expect to react fastest with the nucleophile I (iodide)? O CH3CH2CH2Br o (CH3)2CHCH2Br o (CH3)2CHCH2Cl o (CH3)3CCH2Br

Explanation / Answer

1)

Leaving group ability of anion

Larger size anion will be more stable because it will have less electron density

So, order of size is

I- > Br- > Cl- >F-

This will also be order of stability of anion and hence the order of leaving group ability

Answer: option 1

I am allowed to answer only 1 question at a time

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