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  2. Work-up - Wikipedia

    en.wikipedia.org/wiki/Work-up

    In this example the organic layer is the product, which is a liquid at room temperature. The bottom aqueous layer is removed with a pipette and discarded. The top layer is transferred to an Erlenmeyer flask where it is treated with anhydrous sodium sulfate to remove any remaining water.

  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. Reductions with samarium(II) iodide - Wikipedia

    en.wikipedia.org/wiki/Reductions_with_samarium...

    The mechanism of reductions of aldehydes and ketones by samarium(II) iodide is based primarily on mechanisms elucidated for similar one-electron reducing agents. [12] Upon single-electron transfer, a ketyl dimer iv forms. In the absence of protic solvent, this dimer collapses to form 1,2-diols.

  5. Chemical synthesis - Wikipedia

    en.wikipedia.org/wiki/Chemical_synthesis

    Chemical synthesis (chemical combination) is the artificial execution of chemical reactions to obtain one or several products. [1] This occurs by physical and chemical manipulations usually involving one or more reactions.

  6. Aqueous two-phase system - Wikipedia

    en.wikipedia.org/wiki/Aqueous_two-phase_system

    It is a common observation that when oil and water are poured into the same container, they separate into two phases or layers, because they are immiscible.In general, aqueous (or water-based) solutions, being polar, are immiscible with non-polar organic solvents (cooking oil, chloroform, toluene, hexane etc.) and form a two-phase system.

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  8. Ariana Grande, the pop music and "Wicked" star, is speaking out about comments surrounding her body, calling the comments "horrible."

  9. Trump isn't president yet. His Cabinet picks are already ...

    www.aol.com/trump-isnt-president-yet-cabinet...

    For example, former President Bill Clinton's nominee for attorney general, Zoë Baird, dropped out of consideration when it was revealed she had hired an undocumented immigrant as a nanny for her ...