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(i) Write the structure of major alkene formed by beta-elimination of 2, 2, 3-trimethyl-3- bromopentane with sodium ethoxide in ethanol. (ii) Which one of the compounds in the following pairs is chiral ? (iii) Identify (A) and (B) in the following : OR How can you convert the following ? (i) But-1-ene to 1-iodobutane (ii) Benzene to acetophenone (iii) Ethanol to propanenitrile |
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Answer» Solution :(i) `CH_(3) -CH=overset(overset(CH_3)|)C-overset(overset(CH_3)|)C-underset(underset(CH_3)|)CH_3` (II)  OR (i) But-1-ene to 1-iodobutane `CH_(3) -underset("But-1-ene")(CH_(2)) -CH=CH_(2) overset("HBr")underset("Peroxide")(to)CH_(3) - CH_(2) -CH_(2) -CH_(2)Br overset("nal")(to)underset("1-Iodobutane")(CH_(3) CH_(2) CH_(2) CH_(2) I) ` (ii) Benzene to acetophenone  (iii) ETHANOL to propanenitrile `underset("Ethanol")(CH_(3) CH_(2) OH) overset(PCI_(3)) (to)CH_(3) CH_(2) CI overset("KCN")(to) underset("Propanenitrile")(CH_(3) CH_(2) CN )` |
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