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Dichlorobis(ethylenediamine)nickel(II)

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Dichlorobis(ethylenediamine­)nickel(II)
Identifiers
CAS Number
3D model (JSmol)
PubChem CID
InChI
  • InChI=1S/4C2H8N2.4ClH.2Ni/c4*3-1-2-4;;;;;;/h4*1-4H2;4*1H;;/q;;;;;;;;2*+2/p-4Key: RHOYQZVYDDJOIB-UHFFFAOYSA-J
SMILES
  • 11.NCCN.NCCN.NCCN.NCCN..
Properties
Chemical formula C8H32Cl4N8Ni2
Molar mass 499.59 g·mol
Density 1.66 g/cm
Melting point > (decomposes)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

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 . This blue solid is soluble in water and some polar organic solvents. It is prepared by ligand redistribution from Cl2 · 2 H2O and hydrated nickel chloride:

2 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 Cl is the inertness of the isostructural tris(ethylenediamine)cobalt(III) cation.

Structure of the dication that comprises the salt "NiCl2(en)2".

References

  1. 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.
  2. 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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