Dear student,

When the geometry and the metal are held constant, the splitting of the d orbitals decreases in the following order.

CO

CN-

>

NO2-

>

NH3

>

-NCS-

>

H2O

>

OH-

F-

-SCN-

Cl-

>

Br-

strong-field ligands

weak-field ligands

Ligands that give rise to large differences between the energies of the t_2g and e_g orbitals are called strong-field ligands. Those at the opposite extreme are known as weak-field ligands.

Because they result from studies of the absorption spectra of transition-metal complexes, these generalizations are known as the spectrochemical series. The range of values of for a given geometry is remarkably large. The value of _o is 100 kJ/mol in the Ni(H₂O)₆²⁺ ion, for example, and 520 kJ/mol in the Rh(CN)₆^3- ion.

Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.

All the best.

Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar  respectively : Click here to download the toolbar..

Askiitians Expert

Sagar Singh

B.Tech, IIT Delhi