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DESCRIBE THE JOHN TELLER EFFECT AND HYBRIDISATION OF CO[NH3]6

DESCRIBE THE JOHN TELLER EFFECT AND HYBRIDISATION OF CO[NH3]6

Grade:12

1 Answers

SAGAR SINGH - IIT DELHI
878 Points
13 years ago

Dear jayant,

In an octahedral crystal field, the t2g orbitals occur at lower energy than the eg orbitals. This is a reflection of the orientation of the orbitals since the t2g are directed between bond axes while the eg point along bond axes. The shielding effect this has on the electrons is used to explain why the Jahn-Teller effect is generally only important for odd number occupancy of the eg level.
The effect of Jahn-Teller distortions is best documented for Cu(II) complexes (with 3 electrons in the eg level) where the result is that most complexes are found to have elongation along the z-axis.

 

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