Search results for "Molybdenum complexes"

showing 3 items of 3 documents

Dioxomolybdenum(VI) and -Tungsten(VI) Amino Bisphenolates as Epoxidation Catalysts

2016

Low-cost metallate salts Na2MO4·2H2O (M = molybdenum, tungsten) react with a tridentate amine bisphenol bis(2-hydroxy-3-tert-butyl-5-methylbenzyl)methylamine (H2ONOtBu) under ambient conditions in acidic methanol solutions. The reactions lead to the formation of isostructural dioxo complexes [MO2(ONOtBu)(MeOH)]·MeOH in convenient yields. Spectral data as well as X-ray analyses reveal these complexes to be isostructural. Both compounds were tested as catalysts for epoxidation of olefins using cis-cyclooctene, cyclohexene, norbornene and styrene as substrates and tert-butyl hydroperoxide and hydrogen peroxide as oxidants. The molybdenum complex catalyses selectively the oxidation of cis-cyclo…

tridentate ligands010405 organic chemistryCyclohexenemolybdenum complexesGeneral Chemistry010402 general chemistry01 natural sciencesCatalysis0104 chemical sciencesStyreneCatalysischemistry.chemical_compoundMetallatechemistryBenzoinkatalyysiepoxidationPolymer chemistryOrganic chemistryBenzilIsostructuraltungsten complexesNorborneneTopics in Catalysis
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Synthesis and characterization of [Mo(μ-EPh)(CO)3(CH3CN)]2 (E=Se, Te), including the X-ray structure of the tellurium derivative

2000

International audience; The reaction of Mo(CO)3(MeCN)3 and E2Ph2 (E=Se, Te) yields the edge-sharing bioctahedral, metalmetal bonded Mo(I) products [Mo(CO)3(MeCN)(μ-EPh)]2. The structure of the tellurolato derivative was confirmed by X-ray crystallography: triclinic, space group , a=7.3149(17), b=9.6959(16), c=9.7090(10) Å, α=80.366(10), β=76.563(13), γ=72.877(16)°, V=636.43(19) Å3, Dcalc=2.222 Mg m−3, μ=3.271 mm−1, R1=0.0418, wR2=0.0689 for 163 parameters and 2238 data with I>2σ(I). The interaction of these compounds with excess E2Ph2 as a possible entry to homoleptic Mo(EPh)3 has been investigated.

Molybdenum complexesX-rayErythropoietin-producing hepatocellular (Eph) receptorchemistry.chemical_elementCrystal structureTriclinic crystal system010402 general chemistry010403 inorganic & nuclear chemistry01 natural sciences0104 chemical sciences3. Good healthInorganic Chemistrychemistry.chemical_compoundCrystallographychemistryCrystal structures[CHIM.CRIS]Chemical Sciences/CristallographyMaterials Chemistry[CHIM.COOR]Chemical Sciences/Coordination chemistryTellurium complexesPhysical and Theoretical ChemistryHomolepticTelluriumDerivative (chemistry)Inorganica Chimica Acta
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A cocrystal of two Mo(VI) complexes bearing different diastereomers of the 2,4-di-tert-butyl-6-{[(1-oxido-1-phenylpropan-2-yl)(methyl)amino]methyl}ph…

2013

The title cocrystal contains two chiral conformational diastereomers, viz. (1S,2R,RN)- and (1S,2R,SN)-, of [2,4-ditert-butyl-6-{[(1-oxido-1-phenylpropan-2-yl)(methyl)amino]- methyl}phenolato](methanol)-cis-dioxidomolybdenum(VI), [Mo(C25H35NO2)O2(CH3OH)], representing the first example of a structurally characterized molybdenum complex with enantiomerically pure ephedrine derivative ligands. The MoVI cations exhibit differently distorted octahedral coordination environments, with two oxide ligands positioned cis to each other. The remainder of the coordination comprises phenoxide, alkoxide and methanol O atoms, with an amine N atom completing the octahedron. The distinct complexes are linked…

ephedrine derivative ligandsmolybdenum complexescocrystal
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