The colour of the coordination compounds depends on the crystal field splitting . What will be the correct order of absorption of wavelength of light in the visible region, for the complexes, `[Co(NH_(3))_(6)]^(3+)`, `[Co(CN)_(6)]^(3-)` and `[Co(H_(2)O)_(6)]^(3+)`?

Options

A. `IIIgtIgtIVgtII`
B. `IIgtIVgtIgtIII`
C. `IIIgtIgtIIgtIV`
D. `IgtIIIgtIVgtII`

Answer

1

Explanation

`Delta` corresponds to the wavelength of the visible light and `Delta =(hc)/(lambda)`
The order of ability to produce`d-` orbital splitting of various ligands ,
`COgtCN^(-)gtNO_(2)^(-)gtengtNH_(3)gtH_(2)OgtOH^(-)gtF^(-)gtCl^(-)gtBr^(-)gtI^(-)`
`{:("strong field","weak field"),("ligands","ligands"),("(larger "Delta")","(smaller"Delta")"):}`