Dichlorobis(ethylenediamine)nickel(II)
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3D model (JSmol)
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PubChem CID
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| Properties | |
| C8H32Cl4N8Ni2 | |
| Molar mass | 499.59 g·mol−1 |
| Density | 1.66 g/cm3 |
| Melting point | > (decomposes) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Dichlorobis(ethylenediamine)nickel(II) is the inorganic compound with the formula NiCl2(en)2, where en = ethylenediamine. The formula is deceptive: the compound is the chloride salt of the coordination complex [Ni2Cl2(en)4]2+. This blue solid is soluble in water and some polar organic solvents. It is prepared by ligand redistribution from [Ni(en)3]Cl2 · 2 H2O and hydrated nickel chloride:[1]
- 2 [Ni(en)3]Cl2 + NiCl2 → 3 NiCl2(en)2
The rapid ligand redistribution is characteristic of the kinetic lability of octahedral nickel(II) complexes. In contrast with the lability of [Ni(en)3]Cl2+ is the inertness of the isostructural tris(ethylenediamine)cobalt(III) cation.
References
[edit]- ^ State, Harold M. (1960). "Bis(Ethylenediamine)Nickel(II) Chloride". Inorganic Syntheses. Vol. 6. pp. 198–199. doi:10.1002/9780470132371.ch63. ISBN 978-0-470-13165-7.
- ^ Joung, K. O.; O'Connor, C. J.; Sinn, E.; Carlin, R. L. (1979). "Structural and magnetic properties of dimeric di-.mu.-chloro-tetrakis(ethylenediamine)dinickel(II) chloride". Inorganic Chemistry. 18 (3): 804–808. doi:10.1021/ic50193a054.
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