Characteristic
Nickel(II) iodide is an inorganic compound with the formula NiI2. This paramagnetic black solid dissolves readily in water to give blue-green solutions of the aquo complexes.
Chemical formula:NiI2
Molar mass:312.5023 g·mol−1
Appearance:iron-black solid (anhydrous)
bluish-green solid (hexahydrate)
Density:5.384 g/cm3
Melting point:780 °C (1,440 °F; 1,050 K) (anhydrous)
43 °C (hexahydrate, loses water)
Solubility in water:124.2 g/100 mL (0 °C)
188.2 g/100 mL (100 °C)
Solubility:alcohols
Magnetic susceptibility (χ):+3875.0·10−6 cm3/mol
Application
NiI2 has found some industrial applications as a catalyst in carbonylation reactions. It is also has niche uses as a reagent in organic synthesis, especially in conjunction with samarium(II) iodide.
Like many nickel complexes, those derived from hydrated nickel iodide have been used in cross coupling.