Subject: Inorganic Chemistry · Chapter: Inorganic Spectroscopy · Topic: Inorganic Spectroscopy – General · Exam: CSIR-NET JUNE 2016 · 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 $\left({}^{51}\mathrm{V}\right)=7/2$ ](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 the EPR spectrum it has two $g$ values and it has two patterns of 8 lines each.