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An example would be the synthesis of Cr 3+ tetraphenylporphyrin chloride: water is added to the dimethylformamide (DMF) solution in which the reaction occurred, and the product precipitates. [10] Precipitation is useful in purifying many other products: e.g. , crude bmim -Cl is taken up in acetonitrile , and dropped into ethyl acetate , where ...
In chemistry, a phase-transfer catalyst or PTC is a catalyst that facilitates the transition of a reactant from one phase into another phase where reaction occurs. Phase-transfer catalysis is a special form of catalysis and can act through homogeneous catalysis or heterogeneous catalysis methods depending on the catalyst used.
Osmeth can be dissolved in tetrahydrofuran (THF) and diluted in an aqueous buffer solution to make a dilute (0.25%) working solution of OsO 4. [18] With tert-BuNH 2, the imido derivative is produced: OsO 4 + Me 3 CNH 2 → OsO 3 (NCMe 3) + H 2 O. Similarly, with NH 3 one obtains the nitrido complex: OsO 4 + NH 3 + KOH → K[Os(N)O 3] + 2 H 2 O
All India Secondary School Examination, commonly known as the class 10th board exam, is a centralized public examination that students in schools affiliated with the Central Board of Secondary Education, primarily in India but also in other Indian-patterned schools affiliated to the CBSE across the world, taken at the end of class 10. The board ...
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
The chemistry of xenon in each oxidation state is analogous to that of the neighboring element iodine in the ... This page was last edited on 1 January 2025, ...
10 September – Researchers in Sweden demonstrate a battery made of carbon fibre composite as stiff as aluminium and energy-dense enough to be used commercially. [400] 11 September. A study finds that the bluestreak cleaner wrasse (Labroides dimidiatus), a small tropical fish, may possess a form of self-awareness. [401] [402] [403]
Caulton's reagent", V 2 Cl 3 6] [Zn 2 Cl 6], which is used in organic chemistry, is an example of a salt containing [Zn 2 Cl 6] 2−. [ 26 ] [ 27 ] The compound Cs 3 ZnCl 5 contains tetrahedral [ZnCl 4 ] 2− and Cl − anions, [ 9 ] so, the compound is not caesium pentachlorozincate, but caesium tetrachlorozincate chloride.