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

(i) Given complex `[Fe(en)_(2)Cl_(2)]Cl`
` x + (0) + 2(-1) + (-1) = 0`
`implies " " x - 3 = 0`
`therefore " " x = 3`
`therefore " " ` oxidation number of Fe = 3
(ii) Hybridisation : `d^(2) sp^(3)`
Shape of complex : octahedral
(iii) Paramagnetic
(vi) Two
(v) No
(vi) Dichloridobis (ethan-1,2-diamine ) Iron (III) Chloride.