Search results
Results from the WOW.Com Content Network
Nickel(II) chloride (or just nickel chloride) is the chemical compound NiCl 2. The anhydrous salt is yellow, but the more familiar hydrate NiCl 2 ·6H 2 O is green. Nickel(II) chloride, in various forms, is the most important source of nickel for chemical synthesis. The nickel chlorides are deliquescent, absorbing moisture from the air to form ...
With nickel-II (tetramethylammonium) 6 [H 3 NiNb 9 O 28 · 17 H 2 O forms a green salt that is very soluble in water, but hardly soluble in ethanol. [50] H 43 K 14 Na 6 Nb 32 Ni 10 O 183 is a nickel-cation-bridged polyoxoniobate which crystallizes in the monoclinic system with cell dimensions a=15.140 b=24.824 c=25.190 Å and β=103.469 and two ...
Nickel(II) chloride is made by dissolving nickel or its oxide in hydrochloric acid. It is usually found as the green hexahydrate, whose formula is usually written NiCl 2 ·6H 2 O. When dissolved in water, this salt forms the metal aquo complex [Ni(H 2 O) 6] 2+. Dehydration of NiCl 2 ·6H 2 O gives yellow anhydrous NiCl 2. [48] Some ...
NiF 2 is prepared by treatment of anhydrous nickel(II) chloride with fluorine at 350 °C: [2]. NiCl 2 + F 2 → NiF 2 + Cl 2. The corresponding reaction of cobalt(II) chloride results in oxidation of the cobalt, whereas nickel remains in the +2 oxidation state after fluorination because its +3 oxidation state is less stable.
Hexaamminenickel chloride is the chemical compound with the formula [Ni(NH 3) 6]Cl 2. It is the chloride salt of the metal ammine complex [Ni(NH 3 ) 6 ] 2+ . The cation features six ammonia (called ammines in coordination chemistry) ligands attached to the nickel (II) ion.
It has been prepared in a one-pot reaction, by deprotonating cyclopentadiene with ethylmagnesium bromide, and adding anhydrous nickel(II) acetylacetonate. [5] A modern synthesis entails treatment of anhydrous sources of NiCl 2 (such as hexaamminenickel chloride) with sodium cyclopentadienyl: [6] [Ni(NH 3) 6]Cl 2 + 2 NaC 5 H 5 → Ni(C 5 H 5) 2 ...
The compound can be prepared by treating nickel or nickel(II) carbonate with acetic acid: . NiCO 3 + 2 CH 3 CO 2 H + 3 H 2 O → Ni(CH 3 CO 2) 2 ·4 H 2 O + CO 2. The mint-green tetrahydrate has been shown by X-ray crystallography to adopt an octahedral structure, the central nickel centre being coordinated by four water molecules and two acetate ligands. [5]
Anhydrous nickel(II) acetylacetonate exists as molecules of Ni 3 (acac) 6. The three nickel atoms are approximately collinear and each pair of them is bridged by two μ 2 oxygen atoms. Each nickel atom has tetragonally distorted octahedral geometry, caused by the difference in the length of the Ni–O bonds between the bridging and non-bridging ...