Identify A, B, C, D, E, R and R1 in the following:
i) Bromocyclohexane is reacting with the metal Mg to give organo-metallic compound/Grignard reagent i.e. Cyclohexyl Magnesium Bromide (A).
Grignard reagents are highly reactive with hydrocarbons to give alkanes. Cyclohexyl Magnesium Bromide reacts with water to cyclohexane (B) and Mg(OH)Br.
ii) As the above reaction, haloalkane with metal Mg react to form the Grignard reagent, alkyl magnesium halide, RMgX, and further with hydrocarbon gives alkane.
∴ C is CH3CH(MgBr)CH3, a Grignard Reagent, R is CH3CH(Br)CH3 and D ≅ H
iii) In the Wurtz Reaction, alkyl halide in the presence of sodium in dry ether gives the double number of carbons.
Now, in the reaction 2,2,3,3-tetramethyl butane is formed after the alkyl halide reacting in the presence of sodium in dry ether.
∴ Number of carbons will be 3 in R1
R1 –X is CH3C(X)(CH3)CH3
And the remaining reaction is same as the above i.e. alkyl halide reacting with Magnesium to give Grignard Reagent (D) and further with hydrocarbon H2O to give alkane (E)
∴ D is CH3C(CH3)(CH3)MgBr
E is CH3CH(CH3)CH3
