Chapter 5, Problem 5.25P

The isomenc ions ${\text{NSO}}^{-}$ (thiazate) and ${\text{SNO}}^{-}$ (thionitrite) ions have been reported. (S. P. So,Inorg. Chem., 1989, 28, 2888).
a. On the basis of the resonance structures of these ions, predict which would be morestable.
b. Sketch the approximate shapes of the $\pi$ and $\pi *$ orbitals of these ions.
c. Predict which ion would have the shorter $\text{N}—\text{S}$ bond and which would have the higherenergy $\text{N}—\text{S}$ stretching vibration? (Stronger bonds have higher energy vibrations.)