Catalytic Nucleophilic Fluorination of Secondary and Tertiary
... entries 3–6). By comparison with copper–ligand systems successfully used in propargylic substitution reactions with other nucleophiles (Table 1, entries 7 and 8), [(IPr)CuCl] displayed pronounced efficiency. The catalyst loading could be reduced to 5 mol % with little change in the product yield (Ta ...
... entries 3–6). By comparison with copper–ligand systems successfully used in propargylic substitution reactions with other nucleophiles (Table 1, entries 7 and 8), [(IPr)CuCl] displayed pronounced efficiency. The catalyst loading could be reduced to 5 mol % with little change in the product yield (Ta ...
hydrogen storage
... sample. The amount of adsorbed hydrogen from the gas phase at 77 K and electrochemically at RT is 1.5 × 10-3 mass%·m-2 g. Together with the maximum specific surface area of carbon (1315 m2 g-1), the maximum measured absorption capacity of the nanostructured material is 2 mass%. The experimental resu ...
... sample. The amount of adsorbed hydrogen from the gas phase at 77 K and electrochemically at RT is 1.5 × 10-3 mass%·m-2 g. Together with the maximum specific surface area of carbon (1315 m2 g-1), the maximum measured absorption capacity of the nanostructured material is 2 mass%. The experimental resu ...
top organomet chem-2006-19-207 pauson
... results of numerous examples. Thus, Nakamura [53] and Milet and Gimbert [54] have performed high-level theoretical calculations on the cobaltacycle formation step, showing that the insertion of the olefin is the critical stereo- and regiochemical-determining step of the PKR. Continuing with the react ...
... results of numerous examples. Thus, Nakamura [53] and Milet and Gimbert [54] have performed high-level theoretical calculations on the cobaltacycle formation step, showing that the insertion of the olefin is the critical stereo- and regiochemical-determining step of the PKR. Continuing with the react ...
Ion Exchange Resins: Catalyst Recovery and Recycle
... nylation on diverse solid supports.106 The fact that all rhodium complexes involved in the catalytic cycle are anionic suggested this system to be an excellent candidate for noncovalent, ionic immobilization,107 and, indeed, this was one of the earliest applications of molecular catalysts supported ...
... nylation on diverse solid supports.106 The fact that all rhodium complexes involved in the catalytic cycle are anionic suggested this system to be an excellent candidate for noncovalent, ionic immobilization,107 and, indeed, this was one of the earliest applications of molecular catalysts supported ...
CHAPTER TWO SOLID STATE REACTIONS 2.0 Introduction The
... reactions, with product selectivity different from that expected in the liquid phase [8, 9, 16, 17, 18]. It is expected that the crystalline solid state may affect the product selectivity of chemical reactions, not only by rate accelerations but also by slowing down rates of competing processes. Man ...
... reactions, with product selectivity different from that expected in the liquid phase [8, 9, 16, 17, 18]. It is expected that the crystalline solid state may affect the product selectivity of chemical reactions, not only by rate accelerations but also by slowing down rates of competing processes. Man ...
Module 2 Asymmetric Carbon-Carbon Bond Forming Reactions
... Alder-ene and Diels-Alder reactions are six electron pericyclic processes between a “diene” or an alkene bearing an allylic hydrogen and an electrondeficient multiple bond to form two bonds ...
... Alder-ene and Diels-Alder reactions are six electron pericyclic processes between a “diene” or an alkene bearing an allylic hydrogen and an electrondeficient multiple bond to form two bonds ...
Small Phenolic Compounds Production from Kraft Black
... Delignification in the Kraft cooking proceeds in three distinct phases: the initial phase, the bulk phase, and the final or residual phase. The initial phase of delignification takes place at a temperature of about 150 ºC, and it is controlled by diffusion. The bulk phase includes the heating period ...
... Delignification in the Kraft cooking proceeds in three distinct phases: the initial phase, the bulk phase, and the final or residual phase. The initial phase of delignification takes place at a temperature of about 150 ºC, and it is controlled by diffusion. The bulk phase includes the heating period ...
Cracking (chemistry)
In petroleum geology and chemistry, cracking is the process whereby complex organic molecules such as kerogens or heavy hydrocarbons are broken down into simpler molecules such as light hydrocarbons, by the breaking of carbon-carbon bonds in the precursors. The rate of cracking and the end products are strongly dependent on the temperature and presence of catalysts. Cracking is the breakdown of a large alkane into smaller, more useful alkanes and alkenes. Simply put, hydrocarbon cracking is the process of breaking a long-chain of hydrocarbons into short ones. More loosely, outside the field of petroleum chemistry, the term ""cracking"" is used to describe any type of splitting of molecules under the influence of heat, catalysts and solvents, such as in processes of destructive distillation or pyrolysis. Fluid catalytic cracking produces a high yield of petrol and LPG, while hydrocracking is a major source of jet fuel, Diesel fuel, naphtha, and again yields LPG.