Discussion Forum



1)

Reagent(s)  which  can be  used to bring about the following transformation is (are)

1622021328_chemistry 27.JPG


A) $LiAlH_{4} in (C_{2}H_{5})_{2}O$

B) $BH_{3}$ in THF

C) $NaBH_{4}$ in $C_{2}H_{5}OH$

D) Raney $Ni/H_{2}$ in THF

Answer:

Option C

Explanation:

Only -CHO group is to be reduced to -CH2OH

   It can be done using $NaBH_{4}$  in  $C_{2}H_{5}OH$

1322021145_C8.JPG

(a)$LiAlH_{4} / (C_{2}H_{5})_{2}O$ reduces I,II and III  into - $CH_{2}OH$ , and IV  into diol.

(b) $BH_{3}$ / THF show same properties as (a)

(c) $NaBH_{4}$ /  $C_{2}H_{5}OH$ reduces  III into -$CH_{2}OH$

(d) Raney nickel, same as (a) and (b) thus (c) is correct reagent