Chapter 5, Problem 5.5P

Although the peroxide ion, ${\text{O}}_{\text{2}}{}^{\text{2}-}$ and the acetylide ion, ${\text{C}}_{{\text{2}}^{\text{2-}}}$ have long been known, thediazenide ion ${\text{N}}_{\text{2}}{}^{\text{2}-}$ has only been prepared much more recently. By comparison with the otherdiatomic species, predict the bond order, bond distance, and number of unpaired electrons for ${\text{N}}_{\text{2}}{}^{\text{2}-}$ (See G. Auffermann, Y. Prots, R. Kniep, Angew. Chem.,Int. Ed., 2001, 40, 547.)