question_answer 31)

What happens when (i) n- butyl chloride is treated with alcoholic KOH. (ii) bromobenzene is treated with Mg in the presence of dry ether. (iii) chlorobenzene is subjected to hydrolysis. (iv)ethyl chloride is treated with aqueous KOH. (v) methyl bromide is treated with sodium in die presence of dry ether. (vi) methyl chloride is treated with KCN?   (i) Dehydrohalogenation (elimination) as alc. KOH is a dehydrohalogenating reagent. (ii) Formation of Grignard reagent. (iii) No reaction, due to double bond character in  bond. (iv) is replaced by ? OH. (v) Wurtz reaction (vi) replaced by ? CN.  

Answer:

(i) But-1-ene is formed as a result of dehydrohalogenation. (ii) Phenyl magnesium bromide is formed.     (iii) Chlorobenzene does not react of hydrolyzed by . (iv) Ethanol is formed. (v) Ethane is formed as a result of Wurtz reaction.   (vi) Cyano methane is formed.