NEET-XII-Chemistry
exam-2 year:2016
- #142Jahn-Teller effect not observed in high
spin complexes of :-
(1) ``d^4``
(2) ``d^9``
(3) ``d^7``
(4) ``d^8``digAnsr: 4Ans : (4)
Sol. John Teller effect explain axial distortion in perfect
octahedral geometry. It is present in d4 high spin,
d7 low spin and d9 configuations which have odd
number of electrons in eg set.
A weak John Teller effect in also present in d7 high
spin complex which has odd number of electrons
in the set.