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A representative catalyst precursor is derived from (cymene)ruthenium dichloride dimer and the tosylated diphenylethylenediamine. These catalysts are mainly employed for the reduction of ketones and imines to alcohols and amines, respectively. The hydrogen-donor (transfer agent) is typically isopropanol, which converts to acetone upon donation ...
Kinetic resolution. In organic chemistry, kinetic resolution is a means of differentiating two enantiomers in a racemic mixture. In kinetic resolution, two enantiomers react with different reaction rates in a chemical reaction with a chiral catalyst or reagent, resulting in an enantioenriched sample of the less reactive enantiomer. [1]
Tencent QQ (Chinese: 腾讯QQ), also known as QQ, is an instant messaging software service and web portal developed by the Chinese technology company Tencent. QQ offers services that provide online social games, music, shopping, microblogging, movies, and group and voice chat software. As of March 2023, there were 597 million monthly active QQ ...
Progressive Corporation. The Progressive Corporation is an American insurance company. In late 2022, Progressive became the largest motor insurance carrier in the U.S. [2] The company was co-founded in 1937 by Jack Green and Joseph M. Lewis, and is headquartered in Mayfield, Ohio. [3] The company insures passenger vehicles, motorcycles, RVs ...
Karstedt's catalyst. C [Si] (C) (C=C)O [Si] (C) (C)C=C. [Pt] Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Karstedt's catalyst is an organoplatinum compound derived from divinyl-containing di siloxane. This coordination complex is widely used in hydrosilylation catalysis.
Phase-transfer catalysis is a special form of catalysis and can act through homogeneous catalysis or heterogeneous catalysis methods depending on the catalyst used. Ionic reactants are often soluble in an aqueous phase but insoluble in an organic phase in the absence of the phase-transfer catalyst. The catalyst functions like a detergent for ...
Catalysis. An air filter that uses a low-temperature oxidation catalyst to convert carbon monoxide to less toxic carbon dioxide at room temperature. It can also remove formaldehyde from the air. Catalysis (/ kəˈtæləsɪs /) is the increase in rate of a chemical reaction due to an added substance known as a catalyst[1][2] (/ ˈkætəlɪst /).
The mechanism for the reduction of a nitrile to an aldehyde with DIBAL-H. The hydride reagent Diisobutylaluminium hydride, or DIBAL-H, is commonly used to convert nitriles to the aldehyde. [ 14 ] Regarding the proposed mechanism, DIBAL forms a Lewis acid-base adduct with the nitrile by formation of an N-Al bond.