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  2. Terminal alkene - Wikipedia

    en.wikipedia.org/wiki/Terminal_alkene

    There are two types of alpha-olefins, branched and linear (or normal). The chemical properties of branched alpha-olefins with a branch at either the second (vinylidene) or the third carbon number are significantly different from the properties of linear alpha-olefins and those with branches on the fourth carbon number and further from the start of the chain.

  3. Alkene - Wikipedia

    en.wikipedia.org/wiki/Alkene

    Alkenes having four or more carbon atoms can form diverse structural isomers. Most alkenes are also isomers of cycloalkanes. Acyclic alkene structural isomers with only one double bond follow: [6] C 2 H 4: ethylene only; C 3 H 6: propylene only; C 4 H 8: 3 isomers: 1-butene, 2-butene, and isobutylene

  4. Propadiene - Wikipedia

    en.wikipedia.org/wiki/Propadiene

    Allene exists in equilibrium with methylacetylene (propyne) and the mixture is sometimes called MAPD for methylacetylene-propadiene: . H 3 CC≡CH ⇌ H 2 C=C=CH 2. for which K eq = 0.22 at 270 °C or 0.1 at 5 °C.

  5. Straight-chain terminal alkene - Wikipedia

    en.wikipedia.org/wiki/Straight-chain_terminal_alkene

    Straight-chain terminal alkenes, also called linear alpha olefins (LAO) or normal alpha olefins (NAO), are alkenes (olefins) having a chemical formula C n H 2n, distinguished from other alkenes with a similar molecular formula by being terminal alkenes, in which the double bond occurs at the alpha (α-, 1-or primary) position, and by having a linear (unbranched) hydrocarbon chain.

  6. Pyramidal alkene - Wikipedia

    en.wikipedia.org/wiki/Pyramidal_alkene

    In one study, [3] the strained alkene 4.4 was synthesized with the highest pyramidalizion angles yet, 33.5° and 34.3°. This compound is the double Diels–Alder adduct of the diiodo cyclophane 4.1 and anthracene 4.3 by reaction in presence of potassium tert-butoxide in refluxing dibutyl ether through a di aryne intermediate 4.2 .

  7. Rearrangement reaction - Wikipedia

    en.wikipedia.org/wiki/Rearrangement_reaction

    In organic chemistry, a rearrangement reaction is a broad class of organic reactions where the carbon skeleton of a molecule is rearranged to give a structural isomer of the original molecule. [1] Often a substituent moves from one atom to another atom in the same molecule, hence these reactions are usually intramolecular. In the example below ...

  8. CEO turnover reaches record levels in 2024 as 'increasing ...

    www.aol.com/finance/record-number-ceos-heading...

    The consulting firm Russell Reynolds, which also tracks CEO changes, said high turnover shows growing risk appetites and "a desire for leaders who can navigate increasing complexity in the macro ...

  9. Ene reaction - Wikipedia

    en.wikipedia.org/wiki/Ene_reaction

    In organic chemistry, the ene reaction (also known as the Alder-ene reaction by its discoverer Kurt Alder in 1943) is a chemical reaction between an alkene with an allylic hydrogen (the ene) and a compound containing a multiple bond (the enophile), in order to form a new σ-bond with migration of the ene double bond and 1,5 hydrogen shift.