Question

crystal field theory

Answer 1

Crystal Field Theory (CFT) is a model that describes the breaking of degeneracies of electron orbital states, usually d or f orbitals, due to a static electric field produced by a surrounding charge distribution.

Answer 2

Crystal field theory:

• This theory was given by Hans Bethe to explain bonding in complex compounds.

• This theory assumes metal and attacking compounds with bonding which are purely ionic which arises due to electrostatic interaction.

• As per this theory, metal is considered a point of positive charge and attacking compound as a point of negative charge.

• It explains the splitting of d orbitals in the presence of an attacking compound.

• The splitting of orbitals depends upon the nature of the attacking compound.

• Attacking compound orient themselves around metal in such a way that there is less repulsion.

• The d orbitals split into $t_2_g$ and $e_g$ orbitals.

         $t_2_g$– set of three orbitals ($d_x_y, d_y_z$ and $d_x_z$) with lower energy

        $e_g$ – set of two orbitals ($d_x_2-y_2$ and $d_z_2$) with higher energy

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