Vanadium(II) iodide

Vanadium(II) iodide
Identifiers
CAS Number	15513-84-5 ;
3D model (JSmol)	Interactive image;
ChemSpider	76640;
ECHA InfoCard	100.035.935
EC Number	239-545-6;
PubChem CID	84959;
CompTox Dashboard (EPA)	DTXSID40935145 ;
	InChI InChI=1S/2HI.V/h2*1H;/q;;+2/p-2 Key: OJFNQCZRUJTCOZ-UHFFFAOYSA-L;
	SMILES [V+2].[I-].[I-];
Properties
Chemical formula	VI2
Appearance	black mica-like
Density	5.44 g/cm3
Melting point	750–800 °C (1,380–1,470 °F; 1,020–1,070 K) (sublimes)
Related compounds
Other anions	Vanadium(II) chloride; Vanadium(II) bromide;
Related compounds	Vanadium(III) iodide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Vanadium(II) iodide is the inorganic compound with the formula VI₂. It is a black micaceous solid. It adopts the cadmium iodide structure, featuring octahedral V(II) centers.^[2] The hexahydrate [V(H₂O)₆]I₂, an aquo complex, is also known. It forms red-violet crystals. The hexahydrate dehydrates under vacuum to give a red-brown tetrahydrate with the formula V(H₂O)₄I₂.^[3]

Preparation

The original synthesis of VI₂ involved reaction of the elements.^[2]

Solvated vanadium(II) iodides can be prepared by reduction of vanadium(III) chlorides with trimethylsilyl iodide.^[4] It reacts with anhydrous ammonia to give the hexaammine complex.^[5]

References

^ ^a ^b Perry, Dale L. (2016-04-19). Handbook of Inorganic Compounds. CRC Press. p. 450. ISBN 978-1-4398-1462-8.
^ ^a ^b Klemm, Wilhelm; Grimm, Ludwig (1942). "Zur Kenntnis der Dihalogenide des Titans und Vanadins". Zeitschrift für Anorganische und Allgemeine Chemie. 249 (2): 198–208. doi:10.1002/zaac.19422490204.
^ Seifert, Hans-Joachim; Gerstenberg, Burkhard (1962). "Darstellung von Vanadin(II)-Verbindungen aus wäßriger Lösung". Zeitschrift für Anorganische und Allgemeine Chemie. 315 (1–2): 56–63. doi:10.1002/zaac.19623150108.
^ Hitchcock, Peter B.; Hughes, David L.; Leigh, G. Jeffery; Sanders, J. Roger; De Souza, Jaisa; McGarry, Celine J.; Larkworthy, Leslie F. (1994). "Preparation of New Vanadium(II) Iodides and Crystal Structure of Hexakis(acetonitrile)vanadium(II)(Tetraiodide)". Journal of the Chemical Society, Dalton Transactions (24): 3683. doi:10.1039/DT9940003683.
^ Eßmann, Ralf; Kreiner, Guido; Niemann, Anke; Rechenbach, Dirk; Schmieding, Axel; Sichla, Thomas; Zachwieja, Uwe; Jacobs, Herbert (1996). "Isotype Strukturen einiger Hexaamminmetall(II)-halogenide von 3d-Metallen: V(NH₃)₆I₂, Cr(NH₃)₆I₂, Mn(NH₃)₆Cl₂, Fe(NH₃)₆Cl₂, Fe(NH₃)₆Br₂, Co(NH₃)₆Br₂ und Ni(NH₃)₆Cl₂". Zeitschrift für Anorganische und Allgemeine Chemie. 622 (7): 1161–1166. doi:10.1002/zaac.19966220709.

[handbook-1] Perry, Dale L. (2016-04-19). Handbook of Inorganic Compounds. CRC Press. p. 450. ISBN 978-1-4398-1462-8.

[Klemm-2] Klemm, Wilhelm; Grimm, Ludwig (1942). "Zur Kenntnis der Dihalogenide des Titans und Vanadins". Zeitschrift für Anorganische und Allgemeine Chemie. 249 (2): 198–208. doi:10.1002/zaac.19422490204.

[3] Seifert, Hans-Joachim; Gerstenberg, Burkhard (1962). "Darstellung von Vanadin(II)-Verbindungen aus wäßriger Lösung". Zeitschrift für Anorganische und Allgemeine Chemie. 315 (1–2): 56–63. doi:10.1002/zaac.19623150108.

[4] Hitchcock, Peter B.; Hughes, David L.; Leigh, G. Jeffery; Sanders, J. Roger; De Souza, Jaisa; McGarry, Celine J.; Larkworthy, Leslie F. (1994). "Preparation of New Vanadium(II) Iodides and Crystal Structure of Hexakis(acetonitrile)vanadium(II)(Tetraiodide)". Journal of the Chemical Society, Dalton Transactions (24): 3683. doi:10.1039/DT9940003683.

[5] Eßmann, Ralf; Kreiner, Guido; Niemann, Anke; Rechenbach, Dirk; Schmieding, Axel; Sichla, Thomas; Zachwieja, Uwe; Jacobs, Herbert (1996). "Isotype Strukturen einiger Hexaamminmetall(II)-halogenide von 3d-Metallen: V(NH₃)₆I₂, Cr(NH₃)₆I₂, Mn(NH₃)₆Cl₂, Fe(NH₃)₆Cl₂, Fe(NH₃)₆Br₂, Co(NH₃)₆Br₂ und Ni(NH₃)₆Cl₂". Zeitschrift für Anorganische und Allgemeine Chemie. 622 (7): 1161–1166. doi:10.1002/zaac.19966220709.

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