For the complex `[Fe(en)_(2)Cl_(2)]Cl` (en = ethylene diamine ) , identify
(i) the oxidation number of iron ,
(ii) the hybrid orbitals and the shape of the complex,
(iii) the magnetic behaviour of the complex ,
(iv) the number of geometrical isomers ,
(v) whether there is an optical isomer also , and
(vi) name of the complex . (At. no. of Fe = 26)

Explanation

a) `[Fe(en)_(2)Cl_(2)]Cl : x + 0 + 2(-1)=+1` or x`=+3`
b) The complex is octahedral in shape. It has `d^(2)sp^(3)` hybridisation.
c) It is an inner orbital complex. With one unpaired electron, it is paramagnetic in nature. ltbr) d) The complex can exist as two geometrical isomers. These are cis nad trans.

e) cis isomere can exist as two optical isomers.
ltrbgt f) IUPAC name of complex : dichloridobis (ethane -1, 2-diamine) iron(III) chloride.