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  2. Work-up - Wikipedia

    en.wikipedia.org/wiki/Work-up

    The product is isolated from the mixture by the following work-up: [3] Synthesis of 4-methylcyclohexene with work-up step in red. A concentrated solution of sodium chloride in water, known as a brine solution, is added to the mixture and the layers are allowed to separate. The brine is used to remove any acid or water from the organic layer.

  3. 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.

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

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

    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]

  5. 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

  6. Mukaiyama aldol addition - Wikipedia

    en.wikipedia.org/wiki/Mukaiyama_aldol_addition

    In the cited example the Lewis acid TiCl 4 is used. First, the Lewis acid activates the aldehyde component followed by carbon-carbon bond formation between the enol silane and the activated aldehyde. With the loss of a chlorosilane the compound 1 is built. The desired product, a racemate of 2 and 3, is obtained by aqueous work-up. [3]

  7. Watchdog warns credit card companies over devaluing ... - AOL

    www.aol.com/watchdog-warns-credit-card-companies...

    The Consumer Financial Protection Bureau (CFPB) on Wednesday warned that credit card companies devaluing or canceling reward points, cash back or miles rewards programs may be breaking the law.

  8. Grignard reagent - Wikipedia

    en.wikipedia.org/wiki/Grignard_reagent

    For example, nonylmagnesium bromide reacts with methyl p-chlorobenzoate to give p-nonylbenzoic acid, in the presence of Tris(acetylacetonato)iron(III) (Fe(acac) 3), after workup with NaOH to hydrolyze the ester, shown as follows. Without the Fe(acac) 3, the Grignard reagent would attack the ester group over the aryl halide. [21]

  9. What should you set your heat to in the winter? Avoid ... - AOL

    www.aol.com/finance/set-heat-winter-avoid...

    What you should set your thermostat at in the winter. Turns out there's a magic number for your thermostat setting in the winter, experts say. That setting? 68 degrees, according to the Energy ...