4AB › Chemistry PYQ › CSIR-NET › December 2019 › Q7Q7 · CSIR-NET Chemistry, December 2019 Paper: CSIR-NET December 2019 · Subject: Inorganic Chemistry · Chapter: Inorganic Spectroscopy · Topic: Inorganic Spectroscopy – General · Marks: 2 · Difficulty: Hard
For an a an octahedral $\mathrm{Cu^{2+}}$ complex depicting axial EPR spectrum (g), the geometry of Cu and the orbital containing the unpaired electron are respectively
(a) Tetragonally elongated, $\mathrm{d}_{x^2-y^2}$
(b) Tetragonally compressed, $\mathrm{d}_{z^2}$
(c) Tetragonally elongated, $\mathrm{d}_{z^2}$
(d) Tetragonally compressed, $\mathrm{d}_{x^2-y^2}$
Answer Answer: A ✓ checked by 4AB · confidence high
The source book printed no answer; this one was worked out and checked — see the explanation.
Explanation An axial spectrum with g∥ > g⊥ > 2.0 is the signature of a tetragonally elongated Cu(II) octahedron with the unpaired electron in d_x²−y².
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