Which among the following statements is incorrect for manganate and permanganate ions?
- Both ions are tetrahedral structure.
- In both the ions, \(p \pi-d \pi\) bonding is observed between oxygen and manganese.
- Both ions are paramagnetic.
- Permanganate is stronger oxidising agent than manganate.
Solution
\(\Rightarrow\) Tetrahedral \(\Rightarrow d \pi(\mathrm{Mn}) \_p \pi(\mathrm{O})\) is present. \(\Rightarrow\) Paramagnetic, due to presence of one unpaired \(d\)-electron of \(\mathrm{Mn}^{+6}\left(3 d^{\prime}\right)\) of \(\mathrm{MnO}_4^{2-}\). \(\Rightarrow\) Oxidising agent.
\(\Rightarrow\) Tetrahedral \(\Rightarrow d \pi(\mathrm{Mn}) \_p \pi(\mathrm{O})\) is present. \(\Rightarrow\) Diamagnetic, due to the absence of unpaired \(d\)-electron in \(\mathrm{Mn}^{+7}\left(3 d^0\right)\) of \(\mathrm{MnO}_4^{-}\). \(\Rightarrow\) Stronger oxidising agent.
Asked in: AP EAMCET 2020 (17 Sep Shift 2)