Nickelous acetate

Details:

Melting point     1555°C
Boiling point     16.6°C
density     1.798 g/cm3
form     solid
CAS DataBase Reference    373-02-4
EPA Substance Registry System    Nickel(II) acetate (373-02-4)
Safety Information
Hazardous Substances Data    373-02-4(Hazardous Substances Data)

Uses    Nickel acetate is used as a catalyst. It also is used as a dye mordant in textiles. Other applications are in electroplating nickel and as a sealer for anodizing aluminum.
Preparation    Nickel acetate is prepared by reacting nickel hydroxide or nickel carbonate with dilute acetic acid. The tetrahydrate is crystallized from solution. Ni(OH)2 + 2CH3COOH → (CH3COO)2Ni + 2H2O
NiCO3 + 2CH3COOH → (CH3COO)2Ni + CO2 + 2H2O
On heating, the solution hydrolyzes depositing nickel hydroxide.
Description    Nickel (II) acetate (Ni (CH3 COO)2 ) is an inorganic compound of nickel and acetic acid. This inorganic compound is usually found as the tetrahydrate. It is used for electroplating.
It can be made by reacting nickel or nickel (II) carbonate with acetic acid.
Ni + 2 CH3 COOH → C4 H6 NiO4 + H2
NiCO3 + 2 CH3 COOH → C4 H6 NiO4 + CO2 + H2 O
The green tetrahydrate has been determined by X-ray crystallography to be octahedral about the central nickel atom, coordinated by four water molecules and two acetate fragments.It may be dehydrated in vacuo, by reaction with acetic anhydride,or by heat.
Chemical Properties    Nickel(II) acetate crystallizes from solutions of the hydroxide in acetic acid at room temperature as the green tetrahydrate. This is isomorphous with the cobalt(II) salt having a distorted octahedral structure with the nickel atoms surrounded by four water molecules and two oxygens from two acetato groups which are trans to each other. Its magnetic moment is 3.30 BM at room temperature. The hygroscopic anhydrous acetate is obtained by dehydration of the tetrahydrate in vacuo or by heating the tetrahydrate under reflux with acetic anhydride. Like the tetrahydrate it is magnetically dilute at room temperature. Upon thermal decomposition in nitrogen (or in vacuo) at 300° it evolves acetone, acetic acid, carbon monoxide, carbon dioxide and water leaving nickel and N13C.