Q4 / 118 · NTA Abhyas (JEE Main) 2020 · Chemistry · Coordination Compounds

The crystal field splitting energy (CFSE) for CoCl64- is about 18000 cm-1 . What would be the CFSE value for [CoCl4]2- ?

Correct answer: 8000

Solution

CFSE Δ0 of [CoCl6]4-=18000cm-1

CFSE Δt of [CoCl4]2-=?

From formula, Δt=49×Δ0

=49×18000 cm-1

=8000 cm-1

Hence, the correct answer is 8000.

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