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Assertion : In tetrahedral complexes lo...

Assertion : In tetrahedral complexes low spin configuration are rarely observed .
Reason : `Delta_(t) = ((4)/(9)) Delta_(0)`

A

If both Assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

if both assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
A
`Delta_(t)` is smaller is compared to `Delta_(0)` . Consequently the orbital splitting energies are not sufficiently large for forcing the pairing . Therefore , low spin configuration are rarely observed .
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Statement-1: All tetrahedral complexes are mainly high spin and the low spin configurations are rarely observed. Statement-2: Delta_(t) is always much smaller even with stronger field ligands and it is never energetically favourable to pair up the electrons.

Assertion (A) : Low spin tetrahedral complexes are rarely observed. Reason (R) : Crystal field splitting is less than pairing energy for tetrahedral complexes.

Low spin configuration are rarely observed in tetrahedral coordination entity formation. Explain.

Why are low spin tetrahedral complexes not formed ?