Vanadyl -acetylacetonate

R spectra, 2, 511 Vanadium tetramethoxide spectroscopy, 2, 347 Vanadyl acetylacetonate, 2, 388 hydrolysis, 2, 379 Vanadyl complexes cupferron... 

In Table 5 the values for the free standard enthalpies for the reactions of neutral donors and anion donors with vanadyl acetylacetonate are listed. It can be seen that towards the reference molecule iodide ion is a somewhat weaker ligand than propanediol carbonate, whereas the bromide ion is between tri-methylphosphate and acetone, and the chloride ion between DMF and DMSO 22>. The fluoride ion and the NCS -ion are stronger donors than all neutral donors but are somewhat weaker than the azide and the cyanide ion. 

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... 

Vanadyl acetylacetonate (6) and vanadium pentoxide have been found to inhibit smoke formation in combustion tests on poly(vinyl chloride). The former is more active.5... 

In presence of triphenyl phosphite or tri(4-methyl 6-f-butylphenyl) phosphite, (6) also acts as an oxidation inhibitor for polyenes. The complexes formed have not been studied, but the effect is attributed to termination of radical chains and the complexes are more active than the phosphites alone.29 Vanadyl acetylacetonate is also employed as a hardener for unsaturated polyesters.30... 

Bis(acctonitro)chloronitropalladium(II). /-Butyl hydroperoxide-Dialkyl taitratesr-Vanadium(IV) isoproxide. t-Butylhydroperoxide-Molybdenum carbonyl. t-Butylhydroperoxide-Vanadyl acetylacetonate. [(— )-Camphor-10-ylsulfonyl]-3-aryloxaziridines. m-Chloroperbenzoic acid-Potassium fluoride. Dimethylsulfonium methylidc. 3,5-Dinitroperbenzoic acid. Hydrogen peroxide-Vilsmeier reagent. p3-Oxohexakis(p-... 

IIMui-etylacetonatejoxovanadium (Vanadyl acetylacetonate), VO(C5H70,) . Mol. wt. 7(,5.16. Supplier Alfa. 

Butyl hydroperoxide-Vanadyl acetylacetonate-Titanium (IV) isopropoxide. 

Fig. 32 Vanadyl acetylacetonate-catalyzed oxidative ring expansion of bicyclic cyclopropanols...

However, since the catalytic system is homogenous, carefully adjusted reaction conditions were needed to circumvent the second nonselective catalytic cycle. Slow addition of the alkene and the hydrogen peroxide was necessary to obtain good enantioselectivities (Table 6) [13]. Recently, Backvall s group reported that the Cinchona alkaloid ligand participated in the reoxidation process and took the role of NMO in the catalytic cycle [15]. Versions of the triple catalytic system with vanadyl acetylacetonate replacing the flavin analogue [16] or m-CPBA as the terminal oxidant [17] have been developed and successfully applied to racemic dihydroxylation reactions. 

In addition, the polymerization could be performed catalytically in the presence of air. For example, 4,4 -bis(naphthoxy)diphenyl sulfone was polymerized using atmospheric oxygen as the oxidant, 1 mol% vanadyl-acetylacetonate and 10% triflic acid in CHC13 [Eq. (63)] [211]. 

Bis(trimethylsUyl)peroxide-Vanadyl acetylacetonate, (CH3)2SiOOSi(CH3)3-VO(acac)2. 

ALLYLIC REARRANGEMENT Bis(trimethyl-silyl)peroxide-Vanadyl acetylacetonate. 

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