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Reactivity (chemistry)

About: Reactivity (chemistry) is a research topic. Over the lifetime, 43813 publications have been published within this topic receiving 833536 citations. The topic is also known as: reactivity (chemistry) & chemical reactivity.


Papers
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Journal ArticleDOI
TL;DR: A critical review of the literature of catalytic hydroprocessing reactions can be found in this article, where the authors present thermodynamic, reactivity, reaction network and kinetic data of hydrogenation of aromatic hydrocarbons, hydrodesulfurization, hydrodenitrogenation and hydrodeoxygenation.
Abstract: Critical review of the literature of catalytic hydroprocessing reactions. Presentation of thermodynamic, reactivity, reaction network and kinetic data of hydrogenation of aromatic hydrocarbons, hydrodesulfurization, hydrodenitrogenation and hydrodeoxygenation

856 citations

Journal ArticleDOI
TL;DR: Experimental and computational evidence indicates that the pivalate anion is a key component in the palladium-pivalic acid cocatalyst system, that it lowers the energy of C-H bond cleavage and acts as a catalytic proton shuttle from benzene to the stoichiometric carbonate base.
Abstract: A palladium−pivalic acid cocatalyst system has been developed that exhibits unprecedented reactivity in direct arylation This reactivity is illustrated with the first examples of high yielding direct metalation−arylation reactions of a completely unactivated arene, benzene Experimental and computational evidence indicates that the pivalate anion is a key component in the palladation/C−H bond breaking event, that it lowers the energy of C−H bond cleavage and acts as a catalytic proton shuttle from benzene to the stoichiometric carbonate base Eight examples of substituted aryl bromides are included which undergo direct arylation with benzene in 55−85% yield

839 citations

Journal ArticleDOI
TL;DR: In this article, a reproducible and simple strategy using generic chemicals is introduced for controlling the size, shape, and size distribution of oxide nanocrystals, which is based on pyrolysis of metal fatty acid salts, the most common metal compounds compatible with nonaqueous solutions.
Abstract: A general, reproducible, and simple strategy using generic chemicals is introduced for controlling the size, shape, and size distribution of oxide nanocrystals. The reaction system was generally composed of the metal fatty acid salts, the corresponding fatty acids, and a hydrocarbon solvent. The method is based on the pyrolysis of metal fatty acid salts, the most common metal compounds compatible with nonaqueous solutions. Synthesis of nearly monodisperse Fe3O4 nanocrystals in a large size range (3−50 nm) was developed as the model system. The method was further applied for the growth of oxide nanocrystals of the other magnetic metals in the fourth rowCr2O3, MnO, Co3O4, and NiO nanocrystals. The size and shape control of the nanocrystals were achieved by varying the reactivity and concentration of the precursors. The reactivity was tuned by changing the chain length and concentration of the ligands, the fatty acids. Alcohols or primary amines could be used as the activation reagents when a given metal fat...

818 citations

Journal ArticleDOI
TL;DR: The fundamental principles that govern the reactivity of intermediates containing metal-boron bonds are emphasized and how an understanding of the effects of the ligands on this reactivity led us to broaden the scope of main group reagents that react under mild conditions to generate synthetically useful organosilanes is described.
Abstract: Methods that functionalize C–H bonds can lead to new approaches for the synthesis of organic molecules, but to achieve this goal, researchers must develop site-selective reactions that override the inherent reactivity of the substrates. Moreover, reactions are needed that occur with high turnover numbers and with high tolerance for functional groups if the C–H bond functionalization is to be applied to the synthesis of medicines or materials. This Account describes the discovery and development of the C–H bond functionalization of aliphatic and aromatic C–H bonds with borane and silane reagents. The fundamental principles that govern the reactivity of intermediates containing metal–boron bonds are emphasized and how an understanding of the effects of the ligands on this reactivity led us to broaden the scope of main group reagents that react under mild conditions to generate synthetically useful organosilanes is described.Complexes containing a covalent bond between a transition metal and a three-coordina...

804 citations


Network Information
Related Topics (5)
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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202231
20211,263
20201,248
20191,221
20181,182
20171,116