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dbr:Metal_vapor_synthesis

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Condensation de vapeurs métalliques Metal vapor synthesis

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La condensation de vapeurs métalliques, ou metal vapor synthesis (MVS) en anglais, est une méthode de production de complexes métalliques par combinaison d'atomes ou de petites particules de métal fraîchement produites avec des ligands. In chemistry, metal vapor synthesis (MVS) is a method for preparing metal complexes by combining freshly produced metal atoms or small particles with ligands. In contrast to the high reactivity of such freshly produced metal atoms, bulk metals typically are unreactive toward neutral ligands. The method has been used to prepare compounds that cannot be prepared by traditional synthetic methods, e.g. Ti(η6-toluene)2. The technique relies on a reactor that evaporates the metal, allowing the vapor to impinge on a cold reactor wall that is coated with the organic ligand. The metal evaporates upon being heated resistively or irradiated with an electron beam. The apparatus operates under high vacuum. In a common implementation, the metal vapor and the organic ligand are co-condensed at liquid nit

owl:sameAs

dbr:Metal_vapor_synthesis dbpedia-fr:Condensation_de_vapeurs_métalliques n7:2qrTM yago-res:Metal_vapor_synthesis wd:Q30715375

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n4:_Bocarsly dbr:Organomolybdenum_chemistry n8:chromium dbr:Carbothermic_reaction dbr:Enthalpy_of_vaporization dbr:Transition_metal_arene_complex dbr:Geoffrey_Ozin n13: dbr:Vaporizer n19:this wikipedia-en:Metal_vapor_synthesis dbr:Rieke_metal

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n17:Chemistry n22:Chemical_processes

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dbc:Vacuum dbc:Chemical_processes

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52555162

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1107522644

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dbr:Metal_complex dbr:Resistive_heating dbr:Ligand n18:_chloride dbc:Vacuum dbr:Chemistry dbc:Chemical_processes dbr:Electron_beam

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wikipedia-en:Metal_vapor_synthesis

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n21:0

dbo:abstract

La condensation de vapeurs métalliques, ou metal vapor synthesis (MVS) en anglais, est une méthode de production de complexes métalliques par combinaison d'atomes ou de petites particules de métal fraîchement produites avec des ligands. In chemistry, metal vapor synthesis (MVS) is a method for preparing metal complexes by combining freshly produced metal atoms or small particles with ligands. In contrast to the high reactivity of such freshly produced metal atoms, bulk metals typically are unreactive toward neutral ligands. The method has been used to prepare compounds that cannot be prepared by traditional synthetic methods, e.g. Ti(η6-toluene)2. The technique relies on a reactor that evaporates the metal, allowing the vapor to impinge on a cold reactor wall that is coated with the organic ligand. The metal evaporates upon being heated resistively or irradiated with an electron beam. The apparatus operates under high vacuum. In a common implementation, the metal vapor and the organic ligand are co-condensed at liquid nitrogen temperatures. In several case where compounds are prepared by MVS, related preparations employ conventional routes. Thus, tris(butadiene)molybdenum was first prepared by co-condensation of butadiene and Mo vapor, but yields are higher for the reduction of molybdenum(V) chloride in the presence of the diene.

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2169