enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Work-up - Wikipedia

    en.wikipedia.org/wiki/Work-up

    separating the reaction mixture into organic and aqueous layers by liquid-liquid extraction. removal of solvents by evaporation. purification by chromatography, distillation or recrystallization. The work-up steps required for a given chemical reaction may require one or more of these manipulations.

  3. 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone - Wikipedia

    en.wikipedia.org/wiki/2,3-Dichloro-5,6-dicyano-1...

    2 C 6 Cl 2 (CN) 2 O 2 + C 10 H 12 → 2 C 6 Cl 2 (CN) 2 (OH) 2 + C 10 H 8. The resulting hydroquinone is poorly soluble in typical reaction solvents (dioxane, benzene, alkanes), which facilitates workup. Solutions of DDQ in benzene are red, due to the formation of a charge-transfer complex. [9]

  4. Hoesch reaction - Wikipedia

    en.wikipedia.org/wiki/Hoesch_reaction

    The mechanism of the reaction involves two steps. The first step is a nucleophilic addition to the nitrile with the aid of a polarizing Lewis acid, forming an imine, which is later hydrolyzed during the aqueous workup to yield the final aryl ketone. Hoesch reaction mechanism

  5. Acid–base extraction - Wikipedia

    en.wikipedia.org/wiki/Acid–base_extraction

    Acid–base extraction is a subclass of liquid–liquid extractions and involves the separation of chemical species from other acidic or basic compounds. [1] It is typically performed during the work-up step following a chemical synthesis to purify crude compounds [2] and results in the product being largely free of acidic or basic impurities.

  6. McMurry reaction - Wikipedia

    en.wikipedia.org/wiki/McMurry_reaction

    The McMurry reaction of benzophenone. The McMurry reaction is an organic reaction in which two ketone or aldehyde groups are coupled to form an alkene using a titanium chloride compound such as titanium(III) chloride and a reducing agent.

  7. Corey–House synthesis - Wikipedia

    en.wikipedia.org/wiki/Corey–House_synthesis

    The Corey–House synthesis (also called the Corey–Posner–Whitesides–House reaction and other permutations) is an organic reaction that involves the reaction of a lithium diorganylcuprate with an organic halide or pseudohalide (′) to form a new alkane, as well as an ill-defined organocopper species and lithium (pseudo)halide as byproducts.

  8. Workup - Wikipedia

    en.wikipedia.org/wiki/Workup

    Workup may refer to: Workup (chemistry) , manipulations carried out after the main chemical reaction to secure the desired product Workup, a game of practice baseball (see scrub baseball )

  9. Grignard reagent - Wikipedia

    en.wikipedia.org/wiki/Grignard_reagent

    Such reactions usually involve an aqueous acidic workup, though this step is rarely shown in reaction schemes. In cases where the Grignard reagent is adding to an aldehyde or a prochiral ketone, the Felkin-Anh model or Cram's Rule can usually predict which stereoisomer will be formed.