Question

Which of the following is an oxidising agent?

• A. $Mn(CO{)}_5$
• B. $Fe(CO{)}_5$
• C. $M{n}_2(CO{)}_{10}$
• D. $F{e}_2(CO{)}_9$

Answer 1

The correct option is B $Fe(CO{)}_5$

1. Oxidising agent means it undergoes reduction.

2. That is the complex which undergoes reduction so as to produce the most stable configuration will be the oxidising agent.

$Mn(CO{)}_5+e^{-}⟶[Mn(CO{)}_5{]}^{-}$

oxidation state of $Mn$ in $\left[Mn\right(CO{)}_5]-=x+5(0)=-x=-1$

$EAN=Z\pm$oxidation state $+2$ Coordination Number $=25+1+2\left(5\right)=36$

(which is the stable configuration of $Kr$)