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- Nickel compounds are chemical compounds containing the element nickel which is a member of the group 10 of the periodic table. Most compounds in the group have an oxidation state of +2. Nickel is classified as a transition metal with nickel(II) having much chemical behaviour in common with iron(II) and cobalt(II). Many salts of nickel(II) are isomorphous with salts of magnesium due to the ionic radii of the cations being almost the same. Nickel forms many coordination complexes. Nickel tetracarbonyl was the first pure metal carbonyl produced, and is unusual in its volatility. Metalloproteins containing nickel are found in biological systems. Nickel forms simple binary compounds with non metals including halogens, chalcogenides, and pnictides. Nickel ions can act as a cation in salts with many acids, including common oxoacids. Salts of the hexaaqua ion (Ni · 6 H2O2+) are especially well known. Many double salts containing nickel with another cation are known. There are organic acid salts. Nickel can be part of a negatively charged ion (anion) making what is called a nickellate. Numerous quarternary compounds (with four elements) of nickel have been studied for superconductivity properties, as nickel is adjacent to copper and iron in the periodic table can form compounds with the same structure as the high-temperature superconductors that are known. (en)
- 镍化合物是镍和其它元素形成的化合物。镍在化合物中，最稳定的价态是+2价，此外，还存在+3、+4两种高价态和+1、0、-1、-2四种低价态。镍的配位化合物是多彩的，不同配体能使镍(II)产生不同的颜色，如最常见的[Ni(H2O)6]2+是以水为配体的配离子，它显绿色。 (zh)
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- 镍化合物是镍和其它元素形成的化合物。镍在化合物中，最稳定的价态是+2价，此外，还存在+3、+4两种高价态和+1、0、-1、-2四种低价态。镍的配位化合物是多彩的，不同配体能使镍(II)产生不同的颜色，如最常见的[Ni(H2O)6]2+是以水为配体的配离子，它显绿色。 (zh)
- Nickel compounds are chemical compounds containing the element nickel which is a member of the group 10 of the periodic table. Most compounds in the group have an oxidation state of +2. Nickel is classified as a transition metal with nickel(II) having much chemical behaviour in common with iron(II) and cobalt(II). Many salts of nickel(II) are isomorphous with salts of magnesium due to the ionic radii of the cations being almost the same. Nickel forms many coordination complexes. Nickel tetracarbonyl was the first pure metal carbonyl produced, and is unusual in its volatility. Metalloproteins containing nickel are found in biological systems. (en)
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- Nickel compounds (en)
- 镍化合物 (zh)
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