Q117 · CSIR-NET Chemistry, June 2011

Paper: CSIR-NET June 2011 · Subject: Physical Chemistry · Chapter: Group Theory · Topic: Character Tables · Marks: 2 · Difficulty: Medium

Identify the Mulliken notation for the following irreducible representation 2

(a)$\mathrm{A}_{\mathrm{lu}}^{\prime}$

(b)$\mathrm{A}_{2 \mathrm{u}}^{\prime \prime}$

(c)$\mathrm{B}_{2 \mathrm{u}}^{\prime}$

(d)$\mathrm{A}_{2 \mathrm{u}}^{\prime}$

Answer

Answer: B ✓ checked by 4AB · confidence high

Explanation

Symmetric under Cₙ gives A; antisymmetric under C₂′ gives subscript 2; σh = −1 gives ″; i = −1 gives u. The label is A₂u″, as in the chapter key (b).

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