Water of Crystallization - Table of Crystallization Water in Some Inorganic Halides

Table of Crystallization Water in Some Inorganic Halides

In the table below are indicated the number of molecules of water per metal in various salts.

Formula of
hydrated metal halides		 Coordination
sphere of the metal		 equivalents
of water of
crystallization that
are not bound to M		 Remarks
VCl3(H2O)6 trans-+ two
VBr3(H2O)6 trans-+ two bromides and
chlorides are usually
similar
VI3(H2O)6 3+ none iodide competes
poorly with water
CrCl3(H2O)6 trans-+ two dark green isomer
CrCl3(H2O)6 2+ one blue-green isomer
CrCl2(H2O)4 trans- none molecular
CrCl3(H2O)6 3+ none violet isomer
MnCl2(H2O)6 trans- two
MnCl2(H2O)4 cis- none note cis
molecular
MnBr2(H2O)4 cis- none note cis
molecular
MnCl2(H2O)2 trans- none polymeric with
bridging chloride
MnBr2(H2O)2 trans- none polymeric with
bridging bromide
FeCl2(H2O)6 trans- two
FeCl2(H2O)4 trans- none molecular
FeBr2(H2O)4 trans- none molecular
FeCl2(H2O)2 trans- none polymeric with
bridging chloride
CoCl2(H2O)6 trans- two
CoBr2(H2O)6 trans- two
CoBr2(H2O)4 trans- none molecular
CoCl2(H2O)4 cis- none note: cis
molecular
CoCl2(H2O)2 trans- none polymeric with
bridging chloride
CoBr2(H2O)2 trans- none polymeric with
bridging bromide
NiCl2(H2O)6 trans- two
NiCl2(H2O)4 cis- none note: cis
molecular
NiBr2(H2O)6 trans- two
NiCl2(H2O)2 trans- none polymeric with
bridging chloride
CuCl2(H2O)2 2 none tetragonally distorted
two long Cu-Cl distances
CuBr2(H2O)4 n two tetragonally distorted
two long Cu-Br distances

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