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Which of the following will be produced upon adding lithium diisopropylamide, Li

ID: 493989 • Letter: W

Question

Which of the following will be produced upon adding lithium diisopropylamide, LiN(CH(CH_3)_2)_2, to 1-butyne (CH_3CH_2C=CH)? Select one: a. CH_3CH_2C=C-C=CH_2CH_3 + LiH b. CH_3CH_2C=CLi + LiH + HN(CH(CH_3)_2)_2 c. CH_3CH_2C=CLi + HN(CH(CH_3)_2)_2 d. LiCH_2CH_2CsCH + HN(CH(CH_3)_2)_2 e. CH_3CH(Li)CCH + HN(CH(CH_3)_2)_2 Which of the following series of steps will efficiently convert the starting compound to the final one? Select one: a. 1) BH_3, then NaOH and H_2O_2; 2) CrO_3, H_2SO_4 in H_2O; 3) NH_2-CH_3 b. 1) Br_2; 2) excess of NaOH in H_2O; 3) NH_2-CH_3 c. 1) Br_2 in H_2O; 2) 1 mole of NaOH; 3) NH_2-CH_3 d. 1) HBr, ROOR; 2) NaOH in H_2O; 3) NH_2-CH_3

Explanation / Answer

option C is correct

Addition of Br2, H2O produces a halohydrin as product. bromide ion is substituted by OH- ion. NOw, CH3NH2 substitutes hydroxide ion and forms the reuquired product.

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