The ground state and the maximum number of spin-allowed electronic transitions possible in a Co²⁺ tetrahedral… · ABC26IN0664
Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Coordination Compounds – General · Exam: JAM 2005-2022 · Marks: 2 · Difficulty: Medium
The ground state and the maximum number of spin-allowed electronic transitions possible in a $\mathrm{Co}^{2+}$ tetrahedral complex, respectively, are
(a)${ }^{4} \mathrm{A}_{2}$ and 3
(b)${ }^{4} \mathrm{T}_{1}$ and 2
(c)${ }^{4} \mathrm{A}_{2}$ and 2
(d)${ }^{4} \mathrm{T}_{1}$ and 3
Answer
Answer: A ✓ checked by 4AB · confidence high
The source book printed 3; on checking, A is correct — see the explanation.
Explanation
Tetrahedral d⁷ Co²⁺: ground ⁴A₂, three spin-allowed transitions (→⁴T₂, ⁴T₁(F), ⁴T₁(P)) (a).
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