Q5 · CSIR NET Chemistry, June 2016
Paper: CSIR NET June 2016 · Subject: Inorganic Chemistry · Chapter: Inorganic Spectroscopy · Topic: Inorganic Spectroscopy – General · Marks: 2 · Difficulty: Medium
Identify correct statements for the EPR spectrum of $\mathrm{VO(acac)_2}$ [with square pyramidal geometry at vanadium] at 77K $[I({}^{51}\mathrm{V}) = 7/2]$ (A) It has two g values (C) It has one g value (B) It has 8 lines only (D) It has two patterns of 8 lines each. Correct statements are -
(a)A and D
(c)B and C
(b)A and C
(d)B and D
Answer
Answer (as printed): A
Explanation
For vanadium, I= 7/2 . So, 2nI+1= 2(1)(7/2) + 1 = 8 So, in EPR spectrum it has two g values and it has two patterns of 8 lines each.
Explanation as extracted from the printed page; notation may be imperfect.
Study loop for Inorganic Spectroscopy