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Question: EAN Of \(Fe\) is …….\(Fe{\left( {{C_2}{O_4}} \right)_3}^{3 - }\) \(\left( a \right)27\) \(\left(...

EAN Of FeFe is …….Fe(C2O4)33−Fe{\left( {{C_2}{O_4}} \right)_3}^{3 - }
(a)27\left( a \right)27
(b)24\left( b \right)24
(c)35\left( c \right)35
(d)29\left( d \right)29

Explanation

Solution

Coordination complex consists of central metal , surrounded by ions which are called ligands. Example vitamin B12{B_{12}} is one example of coordination complex. In which the central metal is cobalt and ligands are nitrogen.

Complete step by step answer:
Ligand is an ion or molecule which is neutral in nature , that bonds with the central metal atom and forms a complex . ligands are of two types Lewis acid and Lewis base.
Lewis acids are the one which accept electrons and Lewis base is which donate electrons .
EAN is an effective atomic number . It is the total number of electrons surrounding the nucleus of the metal in a metal complex . EAN rules decide the stability of a complex. EAN is generally equal to nearest noble gas .
EAN=Z−X+2nLEAN = Z - X + 2nL
Here , Z=Z = atomic number of the metal in a complex
X=X = Oxidation state of metal
n=n = number of ligand
L=L = number of coordinate bonds formed by ligands
Now , EAN of Fe(C2O4)33−Fe{\left( {{C_2}{O_4}} \right)_3}^{3 - }
Here atomic number of ferrous is 2626
Oxidation state of central metal which is ferrous is 33
Number of coordination bond is 22
Number of ligands are 33
So putting the values EAN=26−3+12EAN = 26 - 3 + 12
EAN=35EAN = 35
So, the option (c)\left( c \right) is correct.
Additional information : The EAN rule is important for the recognition of how protons interact with a substance. There are many types of ligands depending upon the number of atoms in the ligand forming bond with the central metal . Monodentate ligand is one who has one atom which can coordinate with central metal . Bidentate ligand in which two atoms can form coordinate bonds . similarly tridentate ligands and tetradentate ligands have three and four atoms respectively .

Note:
Just like EAN , there is another rule which is known as the 1818electron rule . in this rule the total electrons comes to be 1818. But in EAN rule it can come to the nearest noble gas electronic configuration .