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Vanadium II chloride

Vanadium II) chloride, VCI2. Green solid formed VCI4. plus H2. [Pg.417]

Direct reduction of carbocations is not common but has been observed, e.g. with vanadium(II) chloride ... [Pg.306]

Vanadium(II) chloride dissolved in water is slowly oxidised by the solvent with evolution of hydrogen. Contact with platinum foil accelerates the reaction to violence. [Pg.1443]

The ability of vanadium(II) chloride to facilitate sulfoxide deoxygenation has been discussed (Section IV,C), and it appears that vana-dium(III) sulfoxide complexes may be prepared by air oxidation of van-adium(II) salts in the presence of the sulfoxide. In this manner, [V(Me2S0)6][C104]3 was prepared from vanadium(II) perchlorate (119) and the kinetics of substitution with thiocyanate ion detailed. Care is necessary in handling the pure compound, as it is reported to be sensitive to detonation. A large number of oxovanadium(IV) species have... [Pg.166]

OXIMES Hydrogen peroxide. Pyridinium chlorochromate-Hydrogen peroxide. Sodium dithionite. Vanadium(II) chloride. [Pg.466]

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]

Calcium dihydrogen orthophosphate 1-hydrate, synthesis 5 Calcium hydrogen orthophosphate, synthesis 6 Arsenic(III) fluoride, synthesis 50 Bismuth (III) iodide, synthesis 38 Vanadium(II) chloride, synthesis... [Pg.48]

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]

The method adopted for the preparation of vanadium (II) chloride is the reduction of the trichloride by hydrogen at temperatures not exceeding 675°. [Pg.126]

Vanadium(II) chloride forms apple-green leaflets which behave toward water somewhat like chromium (II) chloride.5 They may be wetted slowly by water. The salt is soluble in water, forming the violet hydrated vanadium(II) ion. This ion is readily oxidized by the oxygen of the air and by hydrogen ion. The salt dissolves in alcohol and ether, the resulting solutions being respectively blue and greenish yellow.3... [Pg.127]

Reductive cleavage of oximes.1 Vanadium(II) chloride in THF is a convenient reagent for deoximation (75-90% yield). [Pg.500]

The ability of phosphines to act as both a metal oxidation states and as a 7r acceptor to relieve electron density from lower metal oxidation states explains, in part, the observation that diphosphines stabilize the +3, +1, and 0 oxidation states at the expense of the +2 oxidation state.870 Vanadium(II) diphosphine halides, [V(dmpe)2X2] (dmpe = dimethyl-dimethylphosphinoethane, X = Br or I), were prepared as side products in the synthesis of [XV(CO)2(dmpe)2].885 The structurally characterized diphosphino V11 tetrahydroborate complex, tra .s-[V(BH4)2(dmpe)2], (223) was synthesized via the reduction of similar vanadium(III) precursors.832 The reaction of a vanadium(II) chloride salt with dmpe afforded the tra s-[VCl2(dmpe)2] complex which can be alkylated with MeLi or MgMe2 to afford the organometallic trans-[V(Me)2(dm pcVJ compound, which in turn reacts with thiocyanate to form tnms -[V(NCS)2(dmpe)2].8 87 Acetonitrile or propionitrile readily displace the chlorides from trans- WCl2(dmpe)2] to form // tf/ ,v-[V( NCR)2(dmpc)2][BI>h4]2 (R = Me or Et) the acetonitrile derivative reacts with HCPh(S02CF3)2 in acetonitrile solvent to yield the hexaacetonitrile species [V(NCMe)6]2+.887... [Pg.220]


See other pages where Vanadium II chloride is mentioned: [Pg.259]    [Pg.155]    [Pg.463]    [Pg.466]    [Pg.639]    [Pg.126]    [Pg.127]    [Pg.265]    [Pg.459]    [Pg.105]    [Pg.307]    [Pg.500]    [Pg.264]    [Pg.772]    [Pg.1040]    [Pg.764]    [Pg.1026]    [Pg.146]    [Pg.87]    [Pg.136]    [Pg.2302]   
See also in sourсe #XX -- [ Pg.1255 ]




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