Question

The complex $Fe(CO{)}_x$ follows the EAN rule.

Then the value of x is:

• A. 3
• B. 4
• C. 5
• D. 6

Answer 1

The correct option is C 5

EAN= [Z metal – (ox. state of the metal) + 2(coordination number of the metal)].

Assume the value of the ccoordination number of the metal as x.

So, according to EAN rule, $26-0+x\times 2=36$

$x=5$.

Option C is correct.