Inelastic electron tunneling spectroscopic investigation of the interaction of molybdenum hexacarbonyl with an aluminum oxide surface

Journal Article · Wed Jan 07 00:00:00 EST 1987 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00235a011· OSTI ID:6812716

Gajda, G J; Grubbs, R H; Weinberg, W H

Molybdenum hexacarbonyl chemisorbs reversibly on fully hydroxylated aluminum oxide surfaces at room temperature to form a molybdenum carboxylic acid which desorbs at room temperature. Heating the surface during the vapor phase exposure of the hexacarbonyl leads to decomposition to a molybdenum oxide (of undetermined oxidation state) and molybdenum carbonyl oxides at 100/sup 0/C and to complete decomposition to multilayers of metallic molybdenum at 140/sup 0/C. Exposure of multilayers of molybdenum hexacarbonyl, deposited on the alumina surface from hexane solution, to 594 ..mu.. W/cm/sup 2/ of 366-nm UV irradiation failed to produce any identifiable irreversibly adsorbed molybdenum species. The exposure of the molybdenum oxide, formed on a 100/sup 0/C surface by adsorption and reaction of the hexacarbonyl, to ethylene at 2 Torr and 100/sup 0/C failed to form any detectable molybdenum carbene type complexes that are proposed to be active metathesis catalysts. Indeed, there was no evidence of any adsorption or reaction of the ethylene with the surface.

• Research Organization: California Institute of Technology, Pasadena
• OSTI ID: 6812716
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 109:1; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBONYLS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
DATA
ELECTRONS
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
INFORMATION
LEPTONS
MEDIUM TEMPERATURE
MOLYBDENUM COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
SEPARATION PROCESSES
SORPTION
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
TUNNEL EFFECT