7 documents found, page 1 of 1
Comparing spectroscopic and electrochemical properties of complexes of type Cp'...
Gonçalves, I.; Gamelas ou Carla A. Gamelas, Carla; Cabrita, C.; Hunstock, E.; Calhorda, M.; Geraldes, C.; Green, J.; Packham, E.; Drew, M.; Felix, V.
Use of organomolybdenum compounds for promoted hydrolysis of phosphoester bonds...
Gomes, A.; Gamelas ou Carla A. Gamelas, Carla; Fernandes, J.; Almeida-Paz, F.; Nunes, P.; Pillinger, M.; Gonçalves, I.; Romão, C.; Abrantes, M.The dissolution of the indenyl (Ind) complex [{(η5‐Ind)Mo(CO)2(μ‐Cl)}2] (1) in N,N′‐dimethylformamide (DMF) gives the ring‐slipped complex [(η3‐Ind)Mo(CO)2Cl(DMF)2] (2). The aerial oxidation of 2 leads to the formation of the dinuclear oxomolybdenum(V) chloride [Mo2O2(DMF)4(μ‐O)2Cl2] (3). The structures of 2 and 3·DMF have been determined by single‐crystal X‐ray diffraction. Compounds 1 and 3 were examined as p...
Application of an Indenyl Molybdenum Dicarbonyl Complex in the Isomerisation of...
Bruno, S.; Gomes, A. C.; Gamelas ou Carla A. Gamelas, Carla; Abrantes, M.; Oliveira, M. C.; Valente, A.; Almeida-Paz, Filipe; Pillinger, M.; Romão, C.The complex [{(Z5-Ind)Mo(CO)2(m-Cl)}2] (1) has been tested for the industrially relevant catalytic isomerisation of a-pinene oxide (PinOx) to campholenic aldehyde (CPA) in the liquid phase. PinOx conversion and CPA selectivity are strongly influenced by the solvent employed. Complete conversion of PinOx was achieved within 1 min at 55 1C or 30 min at 35 1C using 1,2-dichloroethane as solvent, giving CPA in 68% ...
Intercalation of a molybdenum eta3-allyl dicarbonyl complex in a layered double...
Gomes, A.; Bruno, S.; Gamelas ou Carla A. Gamelas, Carla; Valente, A.; Abrantes, M.; Gonçalves, I.; Romão, C.; Pillinger, M.A Zn–Al layered double hydroxide (LDH) intercalated by [Mo(η3-C3H5)Cl(CO)2(bpdc)]2− anions (bpdc = 2,2′-bipyridine-5,5′-dicarboxylate) has been prepared by coprecipitation from aqueous solution and characterised by various techniques. The one-pot method gives rise to a highly organised intercalate with an interlayer spacing of 18.3 Å and up to six (00l) basal reflections in the powder X-ray diffraction pattern....
Isomerization of alfa-pinene oxide in the presence of indenyl allyl dicarbonyl ...
Bruno, S. M.; Gamelas ou Carla A. Gamelas, Carla; Gomes, A. C.; Valente, A.; Pillinger, M.; Romão, C.; Gonçalves, I.The indenyl complexes IndM(η3-C3H5)(CO)2 (M=Mo (1), W (2)), (IndMe)Mo(η3-C3H5)(CO)2 (3) and (IndSiMe3)Mo(η3-C3H5)(CO)2 (4) display catalytic activity for the isomerisation of α-pinene oxide. Conversion reached 97% after 3 h at 35 °C in the presence of 1 and 1,2-dichloroethane as solvent, giving campholenic aldehyde in 56% yield. Solvent polarity and basicity appear to affect the reaction rate. Whereas the type ...
Molybdenum(II) Diiodo-Tricarbonyl Complexes Containing Nitrogen Donor Ligands a...
Gamelas ou Carla A. Gamelas, Carla; Neves, P.; Gomes, A. C.; Valente, A.; Romão, C.; Gonçalves, I.; Pillinger, M.The molybdenum(II) tricarbonyl complexes [Mo(CO)3I2L n ] (n = 1, L = 2,2′-bipyridine, 4,4′-di-tert-butyl-2,2′-bipyridine; n = 2, L = pyridine, 4-tert-butylpyridine) have been examined as catalyst precursors for the epoxidation of the biorenewable olefin methyl oleate with tert-butylhydroperoxide. In situ oxidative decarbonylation of the precursors gives highly active and selective molybdenum(VI) catalysts, whic...
Molybdenum(VI) Catalysts obtained from eta3-Allyl Dicarbonyl Precursors: Synthe...
Gamelas ou Carla A. Gamelas, Carla; Gomes, A. C.; Bruno, S.; Almeida-Paz, F.; Valente, A.; Pillinger, M.; Romão, C.; Gonçalves, I.The oxidative decarbonylation of the η3-allyl dicarbonyl complexes [Mo(η3-C3H5)Cl(CO)2(L)] (L = 2,2′- bipyridine (bipy) (1), 4,4′-di-tert-butyl-2,2′-bipyridine (di-tBu-bipy) (2)) by reaction with aqueous tertbutylhydroperoxide (TBHP) or H2O2 gave the following compounds in good to excellent yields: the oxobridged dimers [MoO2Cl(L)]2O (L = bipy (3), di-tBu-bipy (6)) using TBHP(10 equiv.)/CH3CN/r.t.; the molybden...