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  2. Ei mechanism - Wikipedia

    en.wikipedia.org/wiki/Ei_mechanism

    In organic chemistry, the E i mechanism (Elimination Internal/Intramolecular), also known as a thermal syn elimination or a pericyclic syn elimination, is a special type of elimination reaction in which two vicinal (adjacent) substituents on an alkane framework leave simultaneously via a cyclic transition state to form an alkene in a syn elimination. [1]

  3. Electron ionization - Wikipedia

    en.wikipedia.org/wiki/Electron_ionization

    Electron ionization (EI, formerly known as electron impact ionization [1] and electron bombardment ionization [2]) is an ionization method in which energetic electrons interact with solid or gas phase atoms or molecules to produce ions. [3] EI was one of the first ionization techniques developed for mass spectrometry. [4]

  4. Elimination reaction - Wikipedia

    en.wikipedia.org/wiki/Elimination_reaction

    An elimination reaction is a type of organic reaction in which two substituents are removed from a molecule in either a one- or two-step mechanism. [2] The one-step mechanism is known as the E2 reaction, and the two-step mechanism is known as the E1 reaction. The numbers refer not to the number of steps in the mechanism, but rather to the ...

  5. E1cB-elimination reaction - Wikipedia

    en.wikipedia.org/wiki/E1cB-elimination_reaction

    An example of the E1cB reaction mechanism in the degradation of a hemiketal under basic conditions. The E1cB elimination reaction is a type of elimination reaction which occurs under basic conditions, where the hydrogen to be removed is relatively acidic, while the leaving group (such as -OH or -OR) is a relatively poor one.

  6. Fast atom bombardment - Wikipedia

    en.wikipedia.org/wiki/Fast_atom_bombardment

    As previously stated, in FAB the samples are mixed with a non-volatile environment in order to be analyzed.FAB uses a liquid matrix that is mixed with the sample in order to provide a sample ion current that is sustained, reduces damages made to the sample by absorbing the impact of the primary beam, and keeps the sample molecules form aggregating. [8]

  7. Would a government shutdown affect mail delivery? What to know

    www.aol.com/news/government-shutdown-affect-mail...

    With a potential government shutdown looming ahead of the holidays, here's what you need to know if mail services will be impacted by it.

  8. Neighbouring group participation - Wikipedia

    en.wikipedia.org/wiki/Neighbouring_group...

    A classic example of NGP is the reaction of a sulfur or nitrogen mustard with a nucleophile, the rate of reaction is much higher for the sulfur mustard and a nucleophile than it would be for a primary or secondary alkyl chloride without a heteroatom. [4] Ph−S−CH 2 −CH 2 −Cl reacts with water 600 times faster than CH 3 −CH 2 −CH 2 ...

  9. Just How Worried About Social Security Should You Be Right Now?

    www.aol.com/just-worried-social-security-now...

    Furthermore, 43% of retirees believe their benefits will be cut in the future, while 47% of nonretired adults worry that Social Security won't be able to pay them a benefit at all once they retire.