Vanadium III chloride

Vanadium(III) Chloride. Vanadium(III) chloride (vanadium trichloride, VCl ) is a pink-violet sohd, is readily hydrolyzed, and is insoluble in nonpolar solvents but dissolves in donor solvents, eg, acetonitrile, to form coordination compounds. Chemical behavior of the tribromide (VBr ) is similar to that of VCl. ... [Pg.391]

Vanadlum-chlorid, n. vanadium chloride, specif. vanadium(III) chloride, VCI3. -chloriir, n. vanadous chloride, vanadium (IT) chloride, VClj. -eisen, n. ferrovanadium. [Pg.474]

Phthalocyanine 2 can be prepared from 3-phenylphthalic acid (1) and vanadium(III) chloride in the presence of urea and ammonium vanadate at high temperature in a melt.401... [Pg.741]

Vanadium compounds in a low oxidation state are known to be effective for inducing one-electron reduction. The highly stereoselective monodebromination of gem-dibromocyclopropanes proceeds with the help of a low-valent vanadium species generated from vanadium(III) chloride and zinc in dimethoxyethane in cooperation with diethyl phosphonate or triethyl phosphite... [Pg.140]

The BASF route started from hydroquinone, which was converted to 2,5-dihydroterephthalic acid by a Kolbe-Schmitt reaction. One mole of this acid was treated with two moles of an arylamine, both components being in the form of a suspension in aqueous methanol. This was added to a small amount of a solution of vanadium(III) chloride and sodium chlorate. Gentle heating gave a 95% yield of 2,5-bis(arylamino)benzo-l,4-quinone-3,6-dicarboxylic acid. Ring closure to the trans-quinacridonequinone took place in the presence of concentrated sulphuric acid at 60-80 °C. This was then reduced to the required crude pigment by zinc or aluminium powder in caustic soda under pressure,in an aluminium chloride/urea melt or by the use of a sulphuric acid/polyphosphoric acid mixture. [Pg.72]

An interesting oxidative decarboxylation process was reported for a /(-hydroxy acid. Reaction of 2-ethyl-2-(l -hydroxycyclobutyl)butanoic acid with vanadium(III) chloride in the presence of 1 equivalent of l,8-bis(dimethylamino)naphthalcne (Proton Sponge) gave 3-cyclobutylidene-pentane (20).181... [Pg.406]

Grignard reagents-Vanadium(III) chloride, 219 Magnesium, 170, 235 Magnesium bromide, 259 Magnesium chloride-Sodium iodide,... [Pg.410]

Organovanadium reagents, 219 Phenylmagnesium bromide-Vanadi-um(III) chloride, 219 Vanadium(III) chloride, 219 Vanadyl acetylacetonate, 54 Vanadyl trichloride, 289 Zinc Compounds Bis(acetylacetonate)zinc(II), 33... [Pg.415]

N-((Benzyl)oxy)carbonyl)-L-phenylalaninal Phosphorous pentasulfide Vanadium(III) chloride Ethyl chloroacetate a-Acetoxyisobutyryl bromide Thioformamide... [Pg.2990]

Vanadium, powder by reduction of oxide with calcium, 6 50 Vanadium(II) chloride, 4 126 Vanadium (III) chloride, 4 128 6-hydrate, 4 130... [Pg.252]

Vanadium(II) chloride is formed when a mixture of vanadium (IV) chloride and hydrogen is passed through a hot tube1 and by the reduction of vanadium(III) chloride with hydrogen.2 It is also produced by the thermal disproportionation of vanadium(III) chloride3,4 into the nonvolatile dichloride and the volatile tetrachloride. [Pg.126]

About 30 g. of vanadium(III) chloride (0.19 mol) is placed at the middle of a pyrex tube 60 cm. long and 25 mm. in diameter, through which dry nitrogen is passing. This operation can be performed without moisture coming in contact with the salt with the apparatus described in syn-... [Pg.126]

Vanadium(III) chloride is formed by the decomposition of vanadium(IV) chloride1-4 and by the reaction of vanadium (IV) chloride or vanadium(V) oxychloride with sulfur.3 It may also be produced by the chlorination of vana-dium(III) sulfide,8 by the action of carbon tetrachloride on vanadium (III) oxide6 and of hydrogen chloride on powdered vanadium,2 and by the reaction of liquid chlorine with vanadium metal in a sealed tube.7 The method... [Pg.128]

If the vanadium (III) chloride is to be stored, the apparatus (Fig. 14) is sealed below the delivery tube D, but if the salt is to be used immediately, it can be transferred in a stream of dry inert gas after the tube is cracked off above tube D. The yield is about 40 g., or approximately 90% of the theoretical. [Pg.129]

Vanadium(III) chloride is a violet solid which undergoes disproportionation into the dichloride and tetrachloride when heated in a vacuum to a sufficiently high temperature. The trichloride is very soluble in water and behaves like iron(III) chloride and aluminum chloride with respect to... [Pg.129]

Fig. 24. The solid state structure of bis-(cyclopentadienyl)vanadium(III) chloride, which possesses crystallo-graphically imposed mirror plane symmetry (Ref. 257)...

Dichlorotetrakis(2-propanol) vanadium (III) chloride forms bright green crystals which are readily hydrolyzed and oxidized. Indeed, the coordinated alcohol molecules are readily displaced by most other ligands. In solution the band reported at 21,300 cm.-1 disappears after only a few hours even in a stoppered cell, and so all spectra must be taken in a sealed coll.4 Conductivity... [Pg.178]

Vanadocene halide is another important analog that is transformed to various vanadocene derivatives. Vanadocene chloride is prepared from vanadium(III) chloride and thallium cyclopentadienide or vanadocene and hydrogen chloride. Vanadocene dihalide is similarly synthesized from vana-dium(IV) halide via nucleophilic substitution. " Displacement of the chloro group results in functionalization as shown in Scheme 15. [Pg.5044]

VANADIUM BROMIDE see VEKOOO VANADIUM CHLORIDE see VEFOOO VANADIUM(III) CHLORIDE see VEPOOO VANADIUM COMPOUNDS see VCZOOO VANADIUM DUST and FUME (ACGIH) see VDUOOO VANADIUM DUST and FUME (ACGIH) see VDZOOO VANADIUM (OSHA) see VDZOOO VANADIUM OXIDE see VEAOOO VANADIUM(V) OXIDE see VDUOOO VANADIUM OXYTRICHLORIDE see VDPOOO VANADIUM PENTAOXIDE see VDUOOO VANADIUMPENTOXID (GERMAN) see VDUOOO VANADIUM PENTOXIDE (dust) see VDUOOO VANADIUM PENTOXIDE (fume) see VDZOOO... [Pg.1933]

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