Reagents used in Etard reaction (I) and Stephen reaction (II) are: I II (a) PCC SnCl 2 / HCl (b) SnCl 2 / HCl CrO 2 Cl 2 (c) CrO 2 Cl 2 SnCl 2 / HCl (d) CrO 2 Cl 2 PCC

Question

Reagents used in Etard reaction (I) and Stephen reaction (II) are: I II (a) PCC SnCl 2 / HCl (b) SnCl 2 / HCl CrO 2 Cl 2 (c) CrO 2 Cl 2 SnCl 2 / HCl (d) CrO 2 Cl 2 PCC (A) a (B) b (C) c (D) d

Tardigrade Admin · Accepted Answer

The reagents used in Etard reaction (I) is

C r O_{2} C l_{2}

and Stephen reaction (II) is

S n C l_{2} / H Cl

. In Etard reaction, toluene in presence of chromyl chloride gives a brown complex which gives benzaldehyde

In Stephen's reaction, nitriles underges reduction followed by hydrolysis to give aldehyde.

C H_{3} - C \equiv N + 2 [H] S n C l_{2} / H Cl Ether

C H_{3} - C H = N H \cdot H Cl H_{2} O / H^{+} C H_{3} C H O + N H_{4} Cl

	I	II
(a)	PCC	$S n C l_{2} / H Cl$
(b)	$S n C l_{2} / H Cl$	$C r O_{2} C l_{2}$
(c)	$C r O_{2} C l_{2}$	$S n C l_{2} / H Cl$
(d)	$C r O_{2} C l_{2}$	$PCC$

Q. Reagents used in Etard reaction (I) and Stephen reaction (II) are: I II (a) PCC SnCl2​/HCl (b) SnCl2​/HCl CrO2​Cl2​ (c) CrO2​Cl2​ SnCl2​/HCl (d) CrO2​Cl2​ PCC

a

b

c

d

Q. Reagents used in Etard reaction (I) and Stephen reaction (II) are:

I II

(a) PCC $S n C l_{2} / H Cl$

(b) $S n C l_{2} / H Cl$ $C r O_{2} C l_{2}$

(c) $C r O_{2} C l_{2}$ $S n C l_{2} / H Cl$

(d) $C r O_{2} C l_{2}$ $PCC$