Addition of lithium aryl(tetraisopropoxy)titanates [ArTi(OPri)4 Li ] to , -unsaturated ketones proceeded with high enantioselectivity (up to 99% ee) in the presence of an excess amount of chlorotrimethylsilane and a rhodium catalyst (3 mol % Rh), generated from [RhCl(C2H4)2]2 and (S)-binap, in tetrahydrofuran at 20°C to give high yields of the corresponding silyl enolates as 1,4-addition produc...

The respiration of individual 'Hass' and 'Fuerte' fruit was monitored during storage at 8oC and 10oC respectively for 14 days, under a continuous flow of humidified air containing ethylene (C2H4) at 0, 0.01, 0.05, 0.25, 1.0 and 5.0 μL.L. Respiration rates of 'Fuerte' fruit under 0.01 μL.L C2H4 were significantly higher than the controls after 3.3 days of storage, but for 'Hass' fruit respiratio...

An iridium pincer complex {p-KO-C6H2-2,6-[OP(t-Bu)2]2}Ir(C2H4) is immobilized in a propyl bromide-functionalized microporous polymer network using the concepts of surface organometallic chemistry. The support material enables formation isolated active metal sites embedded chemically robust and highly hydrophobic environment. catalyst maintained high porosity – without prior activation exhibited...

The three component reaction of LnCp3, LnCp2Cl (Ln = Nd, Y) and N,N-bis[2-(pyrid-2yl)ethyl]hydroxylamine [HON(C2H4-o-py)2] results in the formation of the [Nd(ON(C2H4-opy)2)2]+[NdCp3Cl]− salt in the case of neodymium and the [Y(ON(C2H4-o-py)2)2]+[YCp2Cl2]− salt if yttrium is used in the synthesis. The N,N-bis[2-(pyrid-2-yl)ethyl]hydroxylaminato ligand is able to coordinate doubly to the metal a...

The slurry polymerization of ethylene was studied by employing a (TiCl4/Mg(OEt)2/TEA) catalyst system in hexane. The effects of triethylaluminum concentration and temperature on polymer yield and polymer viscosity average molecular weight, Mv, were investigated. The maximum polymer yield was obtained at an Al/Ti molar ratio of 124. The highest yield and Mv were achieved at 60 °C. The concentrat...

A new zeolite catalyst, Al-RUB-41, was synthesized for the first time. It was tested as a catalyst in methanol amination, and showed a shape-selective performance that results in a highly favorable product distribution. The shape-selective nature was also evidenced by using Pt-Al-RUB-41 as a bifunctional catalyst for decane hydroconversion. With its unique pore architecture and remarkable shape...

The reaction kinetics for the addition of the muonium (Mu = Jl, + e) atom to C2H4 and C2D4 have been measured over the temperature range 150-500 K at (N2) moderator pressures near 1 atm. A factor of about 8 variation in moderator pressure was carried out for C2H4, with no significant change seen in the apparent rate constant kapp , which is therefore taken to be at the high pressure limit, yiel...

The dynamics of carburization of Mo-oxo precursors exchanged onto H-ZSM-5 strongly influence initial induction periods and steady-state rates during catalytic pyrolysis of CH4 to alkenes and arenes at 900-1000 K. The effects of co-reactants and of activating conditions were examined by on-line time-resolved mass spectrometric analysis of effluent streams using rigorous analyses to account for e...

The first, suggested by Samanos et al. , involves the coupling of ethylene directly with chemisorbed acetate. The resulting acetoxyethyl–palladium intermediate then undergoes b-hydride elimination to form vinyl acetate. Alternatively, ethylene could first dehydrogenate to form a vinyl–palladium intermediate, which then couples with an acetate species adsorbed on the surface to form the VAM dire...

In this work, a metal cobalt catalyst was synthesized, and its activity in the hydrogen production process tested. The substrates were water ethanol. Activity tests conducted at temperature range of 350–600 °C, to ethanol molar ratio 3 5, feed flow 0.4 1.2 mol/h. had specific surface area 1.75 m2/g. most active temperatures 500–600 °C. Under favorable conditions, conversion 97%, efficiency 4.9 ...