Nickel(Ii) Oxide Anion

The chemical formula for nickel(II) oxide anion is NiO2^(2-), where the nickel ion has a +2 charge and the oxide ion has a -2 charge. The compound consists of one nickel atom that is bonded to two oxygen atoms through covalent bonds.

Nickel(II) oxide anion is a dark green or black powder with a molecular weight of 90.69 g/mol. It is insoluble in water but soluble in acids and alkalis. The compound is often used as a catalyst in various chemical reactions due to its high reactivity.

The crystal structure of nickel(II) oxide anion is typically cubic or tetragonal, with a lattice constant of around 0.417 nm. The compound has a high melting point of approximately 1984°C and a density of 6.67 g/cm^3.

In terms of its electronic configuration, the nickel ion in nickel(II) oxide anion has a d^8 electron configuration, which means it has eight electrons in its outermost d orbital. This configuration makes the nickel ion highly reactive and able to form complexes with a wide range of ligands.

Overall, nickel(II) oxide anion is an important compound in various fields, including catalysis, electronics, and materials science.