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the best most stable configuration for an octahedr
Question:
The best (most stable) configuration for an octahedral complex is:
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Compare the Crystal Field Stabilization Energy (CFSE) for each configuration.
CPET - 2025
CPET
Updated On:
Jul 3, 2026
\(d^{10}\)
\(d^8\) (high spin)
\(d^8\) (low spin)
\(d^0\)
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The Correct Option is
C
Solution and Explanation
Step 1:
CFSE=(-0.4nt2g+0.6neg)delta_o.
Step 2:
d0, d10 have CFSE=0.
Step 3:
d8 is t2g6eg2 in both high/low spin, CFSE=-1.2delta_o, largest stabilization.
\[\boxed{d^8 \text{ (low spin) is the most stable}}\]
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