Editing Cobalt(II) chloride (section)

===Hydrates===
The crystal unit of the solid hexahydrate {{chem|CoCl|2}}•6{{chem|H|2|O}} contains the neutral molecule ''trans''-{{chem|CoCl|2|(|H|2|O|)|4}} and two molecules of [[water of crystallization]].<ref>{{Wells5th}}</ref> This species dissolves readily in water and [[ethanol|alcohol]].

The anhydrous salt is [[hygroscopic]] and the hexahydrate is [[deliquescent]].{{citation needed|date=February 2019}} The dihydrate, CoCl<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>, is a [[coordination polymer]].  Each Co center is coordinated to four doubly [[bridging chloride ligand]]s.  The octahedron is completed by a pair of mutually trans [[aquo ligand]]s.<ref>{{cite journal |title=Crystal structures of manganese(II) and iron(II) chloride dihydrate |author1=Morosin, B. |author2=Graeber, E. J. |journal=Journal of Chemical Physics |year=1965 |volume=42 |issue=3 |pages=898–901 |doi=10.1063/1.1696078 |bibcode=1965JChPh..42..898M}}</ref>
{{multiple image
 | align = center
 | width = 200
 | footer = Structures of the forms of cobalt(II) chloride 
 | image1 = Cobalt(II)-chloride-3D-balls.png
 | alt1 = 
 | caption1 = Anhydrous
 | image2 = MX2(H2O)2.png
 | alt2 = 
 | caption2 = Dihydrate
 | image3 = MCl2(aq)6forFeCoNi.png
 | alt3 = 
 | caption3 = Hexahydrate}}