The first tetranuclear vanadium(V) peroxo complex: Preparation, vibrational spectra and X-ray crystal structure of K6[V4O4(O2)8(PO4)]·9H2O

Schwendt, Peter; Oravcová, Alena; Tyršelová, J.; Pavelčík, F.; Marek, Jaromı́r

doi:10.1016/0277-5387(96)00185-4

Cited by 21 publications

(6 citation statements)

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“…In the recent studies by Brégeault et al , and Griffith et al, − a wide variety of new mono-, di-, tri-, and tetranuclear tungsten and molybdemum peroxo POMs with η 2 ,η 1 -peroxo moieties and various central groupsPO 4 , PhPO 3 , Ph 2 PO 2 , SO 4 , AsO 4 HAsO 4 , CH 3 AsO 3 , etc.have been isolated and characterized by X-ray and tested in oxidations with H 2 O 2 . Schwendt et al reported the synthesis and characterization of vanadium(V) peroxo complexes (NH 4 ) 5 [V 2 O 2 (O 2 ) 4 PO 4 ] and K 7 [V 4 O 4 (O 2 ) 8 PO 4 ] …”

Section: Venturello−ishii Systemmentioning

confidence: 99%

“…In the recent studies by Bre ´geault et al 242,243 and Griffith et al, [244][245][246][247] a wide variety of new mono-, di-, tri-, and tetranuclear tungsten and molybdemum peroxo POMs with η 2 ,η 1 251 Ballistreri et al 248 and Hill et al 249 have shown that the Venturello-Ishii epoxidation is first-order in both {PO 4 [WO(O 2 ) 2 ] 4 } 3and alkene. Hill et al 249 obtained kinetic and spectroscopic evidence that two processes dominate during the reaction: a slow epoxidation by oxygen atom transfer from the peroxo POM to alkene (eq 60):…”

Section: Venturello−ishii Systemmentioning

confidence: 99%

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Catalysis by Heteropoly Acids and Multicomponent Polyoxometalates in Liquid-Phase Reactions

1998

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ContentsI. Introduction 171 II. Acid Catalysis by Heteropoly Acids 172 A. HPA Catalysts 172 1. Structure 172 2. Acid Properties 173 3. Supported HPAs 175 4. Salts of HPAs 177 B. Homogeneous Reactions 177 1. Hydration of Olefins 178 2. Esterification and Related Reactions 179 3. Condensation 179 4. Miscellaneous Reactions 180 C. Biphasic Reactions 180 1. Polymerization of Tetrahydrofuran 180 2. Esterification 181 3. Other Reactions 181 D. Heterogeneously Catalyzed Liquid-Phase Reactions 181 1. Paraffin Alkylation 182 2. Friedel−Crafts and Related Reactions 182 3. Esterification, Hydrolysis, and Related Reactions 183 4. Miscellaneous Reactions 184 III. Multicomponent Polyoxometalates in Liquid-Phase Oxidation 184 A. Oxidation with Dioxygen 184 1. General Principles 184 2. Homogeneous Oxidation 185 3. Biphasic Oxidation 187 4. Heterogeneously Catalyzed Oxidation 188 5. Mechanism 189 B. Oxidation with Hydrogen Peroxide 191 1. Venturello−Ishii System 191 2. Other Polyoxometalate Systems 193 IV. Conclusion 194 V. Acknowledgments 195 VI. References 195 Ivan V. Kozhevnikov was born in Novosibirsk, Russia. He received his M.Sc. in chemistry from Novosibirsk University in 1969 and Ph.D. from Boreskov Institute of Catalysis (BIC) in 1972, where he studied with Professor E. S. Rudakov. After three years of postdoctoral studies at the Institute of Physicoorganic Chemistry in Donetsk, he returned to BIC and joined Professor K. I. Matveev group. In 1984 he received his D.Sc. degree and was promoted to Head of laboratory at BIC and appointed Professor at Novosibirsk University. He has held visiting positions at Lund University, Sweden (1990),

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Section: Venturello−ishii Systemmentioning

confidence: 99%

Section: Venturello−ishii Systemmentioning

confidence: 99%

Catalysis by Heteropoly Acids and Multicomponent Polyoxometalates in Liquid-Phase Reactions

1998

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“…61 Another important observation is the two new bands at 912 and 627 cm À1 , which reflect the n(O-O) and n(V-O-O), respectively. 62,63 It is known that the creation of the n(O-O) structure enables the catalytic POM intermediates to be dissolved readily in the reaction system, 64,65 which makes the present H 2 O 2 -based phase-transfer phenomenon understandable.…”

Section: Reusability Of [C 3 Cnpy] 4 Hpmov 2 Catalyst For Hydroxylati...mentioning

confidence: 99%

Phase-transfer hydroxylation of benzene with H2O2 catalyzed by a nitrile-functionalized pyridinium phosphovanadomolybdate

Zhao

Wang

Chen

et al. 2013

Catal. Sci. Technol.

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A new nitrile-tethered pyridinium polyoxometalate (POM) was prepared by anion-exchange of the ionic liquid precursor [N-butyronitrile pyridine]Cl ([C 3 CNpy]Cl) with the Keggin phosphovanadomolybdic acid H 5 PMo 10 V 2 O 40 (PMoV 2 ), and the obtained organic POM salt [C 3 CNpy] 4 HPMoV 2 was characterized by XRD, SEM, TG, 1 H NMR, 13 C NMR, ESI-MS, CHN elemental analysis, nitrogen sorption experiment, and melting point measure. When used as a catalyst, [C 3 CNpy] 4 HPMoV 2 causes the first example of reactioncontrolled phase-transfer hydroxylation of benzene with H 2 O 2 , showing high activity and stable reusability. Based on spectral characterizations and comparisons of reaction results, plus the reversible color change between fresh and recovered catalyst, a unique reaction mechanism is proposed for understanding the highly efficient [C 3 CNpy] 4 HPMoV 2 -catalyzed phase-transfer catalysis. The formation of dissolvable active species [VO(O 2 )] + is responsible for the phase-transfer behavior, while the intramolecular charge transfer and the protonated nitrile in cations accelerate the reaction and favor a better catalyst recovery rate.

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“…and [56][57][58] These compounds possess the simplest oxo-anions, such as [PO 4 ] 3− and [IO 3 ] 5− . Compound V12-OO t Bu was the first report on the structure of alkylperoxo-vanadium species on polyoxometalate.…”

Section: Ligand Exchange Property Of Difluoride-incorporated Dodecava...mentioning

confidence: 99%

Synthesis and oxidation catalysis of a difluoride-incorporated polyoxovanadate and isolation of active vanadium alkylperoxo species

Kikukawa

Sakamoto

Hirasawa

et al. 2022

Catal. Sci. Technol.

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The first tetranuclear vanadium(V) peroxo complex: Preparation, vibrational spectra and X-ray crystal structure of K6[V4O4(O2)8(PO4)]·9H2O

Cited by 21 publications

References 9 publications

Catalysis by Heteropoly Acids and Multicomponent Polyoxometalates in Liquid-Phase Reactions

Catalysis by Heteropoly Acids and Multicomponent Polyoxometalates in Liquid-Phase Reactions

Phase-transfer hydroxylation of benzene with H2O2 catalyzed by a nitrile-functionalized pyridinium phosphovanadomolybdate

Synthesis and oxidation catalysis of a difluoride-incorporated polyoxovanadate and isolation of active vanadium alkylperoxo species

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