Question

(a) For the complex `[Fe(H_(2)O)_(6)]^(3+)` , write the hybridization, magnetic character and spin of the complex. (At. Number : Fe =26)
(b) Draw one of the geometrical isomers of the complex `[Pt(en)_(2)Cl_(2)]^(2+)` which is optically inactive.

Answer 1

`[Fe(CN)^(6)]^(3-) Fe = 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(6)3d^(6)4s^(2)`
`Fe^(3+) = 3d^(5)`

Hybridisation = `d^(2)sp^(3)`
Magnectic character = paramagnetic (1 unparied `e^(-)`)
Spin nature : - Inner orbital or low spin complex
(b) `[Pt (en)^(2)Cl_(2)]^(2+)`
Cis-isomer of `[Pt (en)_(2)Cl_(2)]^(2+)` is optically active.