JEE Main202325 Jan 2023Morning ShiftChemistryHydrocarbonsActual
The correct sequence of reagents for the preparation of Q and R is:
Options
- A(i) Cr 2 O 3 ,   770   K ,   20   atm ; (ii) CrO 2 Cl 2 ,   H 3 O + ; (iii) NaOH ; (i
- B(i) CrO 2 Cl 2 ,   H 3 O + ; (ii) Cr 2 O 3 ,   770   K ,   20   atm ; (iii) NaOH ; (i
- C(i) KMnO 4 ,   OH - ; (ii) Mo 2 O 3 ,   Δ ; (iii) NaOH ; (iv) H 3 O +
- D(i) Mo 2 O 3 ,   Δ ; (ii) CrO 2 Cl 2 ,   H 3 O + ; (iii) NaOH ; (iv) H 3 O +
Correct answer
A. (i) Cr 2 O 3 ,   770   K ,   20   atm ; (ii) CrO 2 Cl 2 ,   H 3 O + ; (iii) NaOH ; (i
Step-by-step solution
It is a sequence of reactions where heptane is oxidised to methyl benzene, further oxidised to benzaldehyde, and finally cannizzaro reaction occurs to give the desired product.