Vanadium (V) oxide trichloride

Structural formula
General
Surname	Vanadium (V) oxide trichloride
other names	Vanadium oxychloride Vanadium oxytrichloride Vanadium (V) oxide trichloride Vanadium oxytrichloride Vanadyl trichloride
Molecular formula	VOCl 3
Brief description	yellow hygroscopic liquid
External identifiers / databases
CAS number 7727-18-6 EC number 231-780-2 ECHA InfoCard 100,028,892 PubChem 24410 ChemSpider 10613097 Wikidata Q421166
properties
Molar mass	173.30 g mol −1
Physical state	liquid
density	1.83 g cm −3
Melting point	−77 ° C
boiling point	126.7 ° C
Vapor pressure	8.1 h Pa (20 ° C)
solubility	violent decomposition in water Soluble in ethanol, ether and glacial acetic acid
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 301-314 EUH: 014 P: 280-301 + 310-305 + 351 + 338-310
MAK	repealed because it is carcinogenic
Toxicological data	140 mg kg −1 ( LD 50 ,  rat ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Vanadium (V) oxide trichloride is a chemical compound that is in the form of a yellow hygroscopic liquid that hydrolyzes quickly .

Extraction and presentation

Vanadium (V) oxide trichloride is synthesized by the chlorination of vanadium (V) oxide or vanadium (III) oxide .

${\displaystyle \mathrm {6\ Cl_{2}+2\ V_{2}O_{5}\longrightarrow 4\ VOCl_{3}+3\ O_{2}} }$

${\displaystyle \mathrm {3\ SOCl_{2}+V_{2}O_{5}\longrightarrow 2\ VOCl_{3}+3\ SO_{2}} }$

${\displaystyle \mathrm {6\ Cl_{2}+2\ V_{2}O_{3}\longrightarrow 4\ VOCl_{3}+O_{2}} }$

${\displaystyle {\ce {V2O5 + 2 AlCl3 -> 2 VOCl3 + Al2O3}}}$

It is also possible to display it by heating vanadium (III) chloride in a stream of oxygen.

properties

Physical Properties

As a vanadium compound, vanadium (V) oxide trichloride is diamagnetic and has a tetragonal structure with an O – V – Cl bond angle of 111 ° and a Cl – V – Cl bond angle of 108 °. The V – O and V – Cl bond lengths are 1.57 Å and 2.14 Å, respectively.

Chemical properties

Vanadium (V) oxide trichloride is chemically similar to phosphorus oxychloride POCl ₃ , but in contrast is a strong oxidizing agent . It is a Lewis acid and quickly hydrolyzes to vanadium pentoxide and hydrochloric acid .

Vanadium (V) oxide trichloride is also used for the synthesis of vanadium oxide dichloride and vanadium oxide monochloride.

${\displaystyle \mathrm {V_{2}O_{5}+3\ VCl_{3}+VOCl_{3}\longrightarrow 6\ VOCl_{2}} }$

${\displaystyle \mathrm {VOCl_{3}+Cl_{2}O\longrightarrow VO_{2}Cl+2\ Cl_{2}} }$

use

Vanadium (V) oxide trichloride

Vanadium (V) oxide trichloride is used as a catalyst for olefin polymerizations (e.g. EPDM ) and as an oxidizing agent for the synthesis of organovanadium compounds and coupling reactions of phenols .

safety instructions

Vanadium (V) oxide trichloride is classified as carcinogenic (category 2).

Individual evidence

1. ↑ ^{a b c d e f g h i} Entry on vanadium (V) oxide trichloride in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
2. ↑ ^{a b c} Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1417.
3. ↑ Data sheet Vanadium (V) trichloride oxide (PDF) from Strem, accessed on April 21, 2016.
4. ^ Rolf B. Johannsen: Vanadium oxytrichloride [Vanadyl (V) chloride] . In: Eugene G. Rochow (Ed.): Inorganic Syntheses . tape 6 . McGraw-Hill Book Company, Inc., 1960, pp. 119-120 (English).