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  2. File:A higher English grammar (IA higherenglishgra00bainrich).pdf

    en.wikipedia.org/wiki/File:A_higher_English...

    No pages on the English Wikipedia use this file (pages on other projects are not listed). Metadata This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.

  3. Sakurai reaction - Wikipedia

    en.wikipedia.org/wiki/Sakurai_reaction

    The silicon plays the key role in stabilizing the carbocation of carbon at the β-position. Hosomi-Sakurai reaction is also applicable for other functional groups such as enones, where conjugate addition is usually seen. In figure 2, the Hosomi- Sakurai reaction has been shown using a cinnamoyl ketone.

  4. Conjugated system - Wikipedia

    en.wikipedia.org/wiki/Conjugated_system

    Cinnamaldehyde is a naturally-occurring compound that has a conjugated system penta-1,3-diene is a molecule with a conjugated system Diazomethane conjugated pi-system. In theoretical chemistry, a conjugated system is a system of connected p-orbitals with delocalized electrons in a molecule, which in general lowers the overall energy of the molecule and increases stability.

  5. Regular and irregular verbs - Wikipedia

    en.wikipedia.org/wiki/Regular_and_irregular_verbs

    The most straightforward type of regular verb conjugation pattern involves a single class of verbs, a single principal part (the root or one particular conjugated form), and a set of exact rules which produce, from that principal part, each of the remaining forms in the verb's paradigm.

  6. Adduct - Wikipedia

    en.wikipedia.org/wiki/Adduct

    A good example from solid-state chemistry is the adducts of ethylene or carbon monoxide of CuAlCl 4. The latter is a solid with an extended lattice structure . Upon formation of the adduct, a new extended phase is formed in which the gas molecules are incorporated (inserted) as ligands of the copper atoms within the structure.

  7. Gilman reagent - Wikipedia

    en.wikipedia.org/wiki/Gilman_reagent

    A conjugated 1,4 addition using a Gilman reagent with an arbitrary R group. These reagents are useful because, unlike related Grignard reagents and organolithium reagents, they react with organic halides to replace the halide group with an R group (the Corey–House reaction).

  8. SN1CB mechanism - Wikipedia

    en.wikipedia.org/wiki/Sn1CB_mechanism

    In coordination chemistry, the S N 1cB (conjugate base) mechanism describes the pathway by which many metal amine complexes undergo substitution, that is, ligand exchange. Typically, the reaction entails reaction of a polyamino metal halide with aqueous base to give the corresponding polyamine metal hydroxide: [ 1 ]

  9. Negative hyperconjugation - Wikipedia

    en.wikipedia.org/wiki/Negative_hyperconjugation

    In organic chemistry, negative hyperconjugation is the donation of electron density from a filled π- or p-orbital to a neighboring σ *-orbital. [1] This phenomenon, a type of resonance, can stabilize the molecule or transition state. [2] It also causes an elongation of the σ-bond by adding electron density to its antibonding orbital. [1]

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