An organic (A) reacts with PCl_(5)to produce another compound (B). (B) reacts with magnesium metal in presence of ether to produce a Grignard reagent (C). (C) reacts with ethanal and the3 product is hydrolysed to produce propan-2-ol. Identify (A), (B) and (C) and explaiin the reactions.

An organic (A) reacts with PCl_(5)to produce another compound (B). (B)

1.	An organic (A) reacts with PCl_(5)to produce another compound (B). (B) reacts with magnesium metal in presence of ether to produce a Grignard reagent (C). (C) reacts with ethanal and the3 product is hydrolysed to produce propan-2-ol. Identify (A), (B) and (C) and explaiin the reactions.
Answer» Solution :(i) Since prop-2-ol is OBTAINED by the action of a grignard reagent (C) on ethanal followed by hydrolysis, therefore, grignard reagent (C) must be `CH_(3)MgCl` `underset("Methylmagg. Chloride")(CH_(3)MgCl)+underset("Ethanal")(CH_(3)CHO) to [CH_(3)-overset(OMgBr)overset(\|)(C)H-CH_(3)]overset(H^(+)//H_(2)O)to underset("Propan-2-ol")(CH_(3)-overset(OH)overset(\|)(C)H-CH_(3))` (ii) Since `CH_(3)MgCl` is obtained by the action of Mg metal on COMPOUND (B), therefore, (B) must be methyl chloride, `CH_(3)Cl` `underset("Methyl chloride (B)")(CH_(3)Cl) + Mg overset("Ether")to underset("Methylmag. chloride (C)")(CH_(3)MgCl)` (iii) Since `CH_(3)Cl` is formed by the action of `PCl_(5)` on compound (A), therefore, compound (A) must be methanol, `CH_(3)OH`. `underset("Methanol (A)")(CH_(3)OH)+PCl_(5)to underset("Methyl chloride (B)")(CH_(3)Cl)+POCl_(3)+HCl`