An organic compound (A), C_(8)H_(4) O_(3) in dry benzene in the preseneof anhydorusAlCl_(3) givescompound(B). Compound (B) on treatmentwith PCl_(5) followedby reaction with H_(2)//Pd (BaSO_(4)) gives compound (C)which on reaction with hydrazine gives a cyclised compound (D),(C_(14) H_(10) N_(2)) Idenyify (A),(B),(C) and (D). Explain the formation of (D) from(C).

An organic compound (A), C_(8)H_(4) O_(3) in dry benzene in the presen

1.	An organic compound (A), C_(8)H_(4) O_(3) in dry benzene in the preseneof anhydorusAlCl_(3) givescompound(B). Compound (B) on treatmentwith PCl_(5) followedby reaction with H_(2)//Pd (BaSO_(4)) gives compound (C)which on reaction with hydrazine gives a cyclised compound (D),(C_(14) H_(10) N_(2)) Idenyify (A),(B),(C) and (D). Explain the formation of (D) from(C).
Answer» Solution : `C underset(-2H_(2)O)OVERSET(NH_(2)-NH_(2))(rarr)` Here, `2 MOL H_(2)O` is removed by `NH_(2)NH_(2)` due to two `(gtgt C = 0)`