Answer the following : (i) Haloalkanes easily dissolve in organic solvents, why? (ii) What is known as a racemic mixture ? Give an example. (iii) Of the two bromoderivatives, C_(6)H_(5)CH(CH_(3))Br " and " C_(6)H_(5)CH(C_(6)H_(5))Br, which one is more reactive in S_(N)1substitution reaction and why?

Answer the following : (i) Haloalkanes easily dissolve in organic sol

1.	Answer the following : (i) Haloalkanes easily dissolve in organic solvents, why? (ii) What is known as a racemic mixture ? Give an example. (iii) Of the two bromoderivatives, C_(6)H_(5)CH(CH_(3))Br " and " C_(6)H_(5)CH(C_(6)H_(5))Br, which one is more reactive in S_(N)1substitution reaction and why?
Answer» Solution :(i) Haloalkanes easily dissolve in organic solvents. This is because the interaction between the haloalkane and the organic solvent is almost similar to that between the molecules of the haloalkane and between the molecules of the organic solvent. Therefore, the molecules of the haloalkane gradually move into the molecules of the organic solvent. (ii) A mixture of equal AMOUNTS dextro and laevo forms of the same compound is called racemic mixture. Here the optical rotation of one form is balanced by the rotation of the other form so that the mixture shows no net rotation. EXAMPLE: `(pm)` butan-2-ol (iii) The two compounds to be compared are: `underset(I)underset(CH_(3))underset(\|)(C_(6)H_(5)CH - Br) ""underset (II) underset (C_(6)H_(5))underset(\|) (C_(6)H_(5)CH - Br)` The carbocation obtained from II is more stabilised through resonance compared to that obtained from I. Therefore, `C_(6)H_(5)CH(C_(6)H_(5))Br`is more reactive in `S_(N)1`SUBSTITUTION.