Vanadium tetrachloride

• Vanadium tetrachloride
• Vanadium (IV ) chloride
• Vanadium tetrachloride

Reddish- brown liquid with a pungent odor

Liquid

1.82 g · cm -3

-28 ° C

148.5 ° C

7.9 hPa (20 ° C)

Decomposes in water with vigorous reaction

Risk

160 mg · kg -1 ( LD50, rat, oral)

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Vanadium ( IV) chloride is a chemical compound selected from the group of chlorides. It is in the form of an unstable, non-flammable, reddish brown liquid with a pungent odor. On exposure to light or humidity, it decomposes to form chlorine gas or hydrogen chloride.

Production and representation

Vanadium ( IV) chloride is obtained by chlorinating vanadium at about 300-350 ° C.

Properties

Vanadium (IV ) chloride is a dark brown, viscous, fuming in air liquid. With water hydrolysis takes place ( blue solution ). It is soluble in concentrated hydrochloric acid ( brown solution ) and ether ( deep red solution ). Vanadium ( IV) chloride is a strong oxidizing agent.

Vanadium ( IV) chloride are added at room temperature slowly chlorine, since it disproportionates into the trichloride:

This can lead to blowing up tightly sealed. Without risk of decomposition, solutions can be kept in carbon tetrachloride, from which it can be obtained pure in case of need by fractionation.

Use

Vanadium ( IV) chloride is used for the preparation of other compounds of vanadium, as well as in organic synthesis and used as a catalyst for polymerization of alkenes. For example, the coupling of phenols:

Safety

Vanadium (IV ) chloride decomposes in water with a violent reaction. It is classified as a Carcinogen and Mutagen category 2.