Nickel(II) chloride

The nickel chlorides are deliquescent, absorbing moisture from the air to form a solution.

Nickel salts have been shown to be carcinogenic to the lungs and nasal passages in cases of long-term inhalation exposure.

It is generated upon extraction nickel matte and residues obtained from roasting refining nickel-containing ores using hydrochloric acid.

It consists of infinite chains of NiCl2, wherein both chloride centers are bridging ligands.

Nickel(II) chloride solutions are acidic, with a pH of around 4 due to the hydrolysis of the Ni2+ ion.

Reactions starting from NiCl2·6H2O can be used to form a variety of nickel coordination complexes because the H2O ligands are rapidly displaced by ammonia, amines, thioethers, thiolates, and organophosphines.

Prolonged inhalation exposure to nickel and its compounds has been linked to increased cancer risk to the lungs and nasal passages.

Nickel(II) chloride hexahydrate
Nickel(II) chloride hexahydrate
NFPA 704 four-colored diamond Health 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gas Flammability 0: Will not burn. E.g. water Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen Special hazards (white): no code
Structure of hydrated nickel chloride based on X-ray crystallography . Color code: red = O, green = Cl
Color of various Ni(II) complexes in aqueous solution. From left to right, [Ni(NH 3 ) 6 ] 2+ , [Ni( en ) 3 ] 2+ , [Ni(H 2 O) 5 Cl] + , [Ni(H 2 O) 6 ] 2+
Application of NiCl 2 precatalyst.