Question

The observed magnetic moment value $\left({\mu }_{abs}\right)$ is higher than calculated magnetic moment value $\left({\mu }_{cal}\right)$ for which of the following species?

• A. Ti${}^{+3}$
• B. V${}^{+2}$
• C. Co${}^{+2}$
• D. Cr${}^{+2}$

Answer 1

Answer: (C)

Co${}^{+2}$

The observed magnetic moment value $\left({\mu }_{abs}\right)$ of $C{o}^{2+}$ is in the range of $4.3-5.2$ which is higher than calculated magnetic moment value $\left({\mu }_{cal}\right)$ which is $3.87$. Values are different enough that they usually confirm the number of unpaired spins (S) and indicate whether the complex is high spin or low spin.