Which of the following species can act as reducing agent ? - Vidyadip

MCQ

Which of the following species can act as reducing agent ?

A
$[Co(CO)_4]^-$
B
$Cr(CO)_6$
C
$Mn(CO)_5$
✓
$Mn(CO)_6$

✓

Answer

Correct option: D.

$Mn(CO)_6$

d
The $CO$ donates two electrons and $NO$ donates three electrons.

So, $\left(3 \times 2 e ^{-}=6 e ^{-}\right) ; 2$ $NO$ can easily replaced $3 CO$.

$\left(6 \times 2 e ^{-}=12 e ^{-}\right) ; 4 NO$ can easily replace $6 CO$

$Fe ( CO )_{5} \rightarrow Fe ( NO )_{2}( CO )_{2}$

$Cr ( CO )_{5} \rightarrow Cr ( NO )_{4}$

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