It is obtained by reacting nickel chloride with potassium cyclopentadienyl chloride in liquid ammonia or with sodium cyclopentadienyl chloride in diethyl ether. It can also be prepared by reacting sodium cyclopentadienyl chloride with nickel dichloride in an ether solvent. Alternatively, it can be prepared by reacting sodium cyclopentadienyl chloride with nickel chloride, or by reacting cyclopentadiene with nickel chloride hexahydrate in dimethyl sulfoxide. To obtain a pure product, it can be purified with petroleum ether or by sublimation under vacuum at 130°C.
GREEN TO DARK GREEN CRYSTALS OR CRYST. POWDER
Nickelocene is a solid crystalline substance of dark green
color, insoluble in water or carbon tetrachloride, slightly
soluble in alcohol and liquid ammonia, and readily soluble in
nonpolar organic solvents.
Nickelocene is obtained through reacting nickel halides with
sodium cyclopentadienide. It is used as a catalyst or as a
complexing agent.
Catalyst, complexing agent.
This metal alkyl may be used to synthesize hybrid organic-inorganic polymeric molecular layer deposition (MLD). Bis(cyclopentadienyl) nickel (Cp 2 Ni) may be used as a Ni precursor for the atomic layer deposition (ALD) of NiO/carbon nanotubes hybrids.
Dark liquid in an 8-10% solution in toluene. Insoluble in water.
Highly flammable. The neat material is sensitive to air. . Insoluble in water.
Organometallics, such as NICKELOCENE, are reactive with many other groups. Incompatible with acids and bases. Organometallics are good reducing agents and therefore incompatible with oxidizing agents. Often reactive with water to generate toxic or flammable gases.
Toxic by inhalation and skin contact, a carcinogen (OSHA).
ACUTE/CHRONIC HAZARDS: NICKELOCENE can be absorbed through the skin.
NICKELOCENE is flammable.
core: nickel
reagent type: catalyst
Confirmed carcinogen
with experimental carcinogenic,
neoplastigenic, and tumorigenic data. Poison
by intraperitoneal and intramuscular routes.
Moderately toxic by ingestion. When heated
to decomposition it emits acrid smoke and
irritating fumes. See also NICKEL
COMPOUNDS.
Dissolve the complex in Et2O, filter and evaporate in a vacuum. Purify it rapidly by recrystallisation from pet ether using a solid CO2/Me2CO bath, m 171-173o(in an evacuated tube). Also purify it by vacuum sublimation. [Wilkinson et al. J Am Chem Soc 76 1970 1954, Beilstein 16 IV 1831.]
