The effect of added molecular sieves on alkene epoxidation reactions catalysed by [MoO2Cl2L], where L is a 3-(diethoxyphosphoryl) derivative of camphor

Clarke, Russell; Cole‐Hamilton, David J.

doi:10.1039/dt9930001913

Cited by 17 publications

(3 citation statements)

References 4 publications

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“…The interaction of hydrogen bonds in organic solids has been utilized in the construction of a variety of supramolecular materials [6], such as molybdenum-based supramolecular networks. These molybdenum-based supramolecular networks differ from the previous molybdenum (VI) complexes containing the cis-MoO 2 fragment, such as MoO 2 X 2 (L 1 ) p [7][8][9][10][11][12][13][14][15][16] and MoO 2 X (L 2 ) q (L 1 ) r [17][18][19] (X = F, Cl, Br or CH 3 ; L = mono or bidentate neutral (L 1 ) or anionic (L 2 ) ligand; p = 2, q ? r = 3) containing coordinative bonds and a bond between Mo and organic ligands (L 1 or L 2 ).…”

Section: Introductionmentioning

confidence: 99%

Two hydrogen-bond-cross-linked molybdenum (VI) network polymers: synthesis, crystal structures and cyclooctene epoxidation with H2O2

Wang

Shi

et al. 2009

Struct Chem

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Two molybdenum (VI) hydrogen-bonded network polymers [MoO 2 F 4 ]Á(4,4 0 -H 2 bpd)(H 2 O) 2 (1) and [MoO 2 Cl 3 (H 2 O)]Á(4,4 0 -H 2 bpd)Cl (2) (bpd = bipiperidine) have been synthesized and examined as catalysts for epoxidation of cyclooctene. Complexes of the Mo compounds containing the bpd ligand are prepared and characterized by infrared spectroscopy, thermogravimetric and elemental analyses. They have been structurally characterized by single crystal X-ray diffraction analysis. The structures of both the complexes are shown to be comprised of molybdenum and two protonated N-ligand cations that have resulted in a crosslinked hydrogen-bonded network structure. These complexes are applicable as catalysts for the cis-cyclooctene epoxidation reactions with hydrogen peroxide as a source of oxygen and NaHCO 3 as a cocatalyst. It has been observed that the formation of the oxidant peroxymonocarbonate ion, HCO 4 -by hydrogen peroxide and bicarbonate enhances the epoxidation reaction. Both the complexes have exhibited a good activity and a very high selectivity for the formation of cyclooctene oxide.

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Section: Introductionmentioning

confidence: 99%

Two hydrogen-bond-cross-linked molybdenum (VI) network polymers: synthesis, crystal structures and cyclooctene epoxidation with H2O2

Wang

Shi

et al. 2009

Struct Chem

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“…[35] In the case of complex 1, after 10 min, 86 % conversion was reached, and afterwards the reaction slowed down considerably (Figure 7). During the course of the catalytic reaction tert-butyl alcohol (tBuOH), a byproduct associated to the consumption of tBuOOH, may act as an inhibitor for the coordination of the oxidant to the metal centre.…”

Section: Catalytic Performance Of Complexmentioning

confidence: 94%

Nanostructured Dioxomolybdenum(VI) Catalyst for the Liquid‐Phase Epoxidation of Olefins

et al. 2010

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A new organosilica hybrid mesoporous material (HM) containing phosphane oxide surface groups was prepared via the "dual" organosilane templated co-condensation of 4-bis-(triethoxysilyl)benzene and (diphenylphosphanyl)propyltriethoxysilane, followed by post-synthesis oxidation of the phosphane surface groups. The HM material was used to immobilise the [Mo(O) 2 Cl 2 ] complex. The resultant material (HM-Mo) is an active and selective catalyst in the liquidphase epoxidation of olefins [cis-cyclooctene, (R)-(+)-limonene, trans-2-octene, 1-octene] with tBuOOH at 55°C and gives comparable epoxide yields to those observed for the

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“…Molybdenum(VI) complexes of the type MoO(O 2 ) 2 L n [1][2][3][4], MoO 2 X 2 L n [5][6][7][8][9][10][11][12][13][14][15][16] and (h 5 -C 5 R 5 )MoO 2 X [17][18][19][20] (X = F, Cl, Br, alkyl; L = mono or bidentate neutral N,O,S-ligand) are good catalysts or catalyst precursors for olefin epoxidation reactions, usually employing tert-butyl hydroperoxide (t-BuOOH) as the mono-oxygen source. Important properties, such as the solubility of the complex and the Lewis acidity of the metal center, can be fine-tuned by variation of either X or L. Up until recently, Mo VI complexes like these have been mainly used as homogeneous catalysts.…”

Section: Introductionmentioning

confidence: 99%

Dioxomolybdenum(VI) modified mesoporous materials for the catalytic epoxidation of olefins

et al. 2006

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The effect of added molecular sieves on alkene epoxidation reactions catalysed by [MoO2Cl2L], where L is a 3-(diethoxyphosphoryl) derivative of camphor

Cited by 17 publications

References 4 publications

Two hydrogen-bond-cross-linked molybdenum (VI) network polymers: synthesis, crystal structures and cyclooctene epoxidation with H2O2

Two hydrogen-bond-cross-linked molybdenum (VI) network polymers: synthesis, crystal structures and cyclooctene epoxidation with H2O2

Nanostructured Dioxomolybdenum(VI) Catalyst for the Liquid‐Phase Epoxidation of Olefins

Dioxomolybdenum(VI) modified mesoporous materials for the catalytic epoxidation of olefins

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