Paper: CSIR-NET June 2013 · Subject: Physical Chemistry · Chapter: Group Theory · Topic: Symmetry Elements Point Groups · Marks: 2 · Difficulty: Hard
A molecules contains the following symmetry operations: $\mathrm{E}, 2 \mathrm{C}_{6}, 2 \mathrm{C}_{3}, \mathrm{C}_{2}, 3 \sigma_{\mathrm{d}}, 3 \sigma_{\mathrm{v}}$. The number of classes and order of the symmetry point group is:
(a)3,12
(b)5,12
(c)6,12
(d)6,6
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
E, 2C₆, 2C₃, C₂, 3σ_v, 3σ_d are the six classes of C₆v; the order is 1 + 2 + 2 + 1 + 3 + 3 = 12.