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  2. Acetal - Wikipedia

    en.wikipedia.org/wiki/Acetal

    In organic chemistry, an acetal is a functional group with the connectivity R 2 C(OR') 2. Here, the R groups can be organic fragments (a carbon atom, with arbitrary other atoms attached to that) or hydrogen, while the R' groups must be organic fragments not hydrogen. The two R' groups can be equivalent to each other (a "symmetric acetal") or ...

  3. Acetyl group - Wikipedia

    en.wikipedia.org/wiki/Acetyl_group

    In organic chemistry, an acetyl group is a functional group denoted by the chemical formula −COCH 3 and the structure −C(=O)−CH 3. It is sometimes represented by the symbol Ac [5] [6] (not to be confused with the element actinium). In IUPAC nomenclature, an acetyl group is called an ethanoyl group.

  4. Functional group - Wikipedia

    en.wikipedia.org/wiki/Functional_group

    Functional group interconversion can be used in retrosynthetic analysis to plan organic synthesis. A functional group is a group of atoms in a molecule with distinctive chemical properties, regardless of the other atoms in the molecule. The atoms in a functional group are linked to each other and to the rest of the molecule by covalent bonds.

  5. Protecting group - Wikipedia

    en.wikipedia.org/wiki/Protecting_group

    The 1,2‑diols present for protecting-group chemistry a special class of alcohols. One can exploit the adjacency of two hydroxy groups, e.g. in sugars, in that one protects both hydroxy groups codependently as an acetal. Common in this situation are the benzylidene, isopropylidene and cyclohexylidene or cyclopentylidene acetals.

  6. Tetrahedral carbonyl addition compound - Wikipedia

    en.wikipedia.org/wiki/Tetrahedral_carbonyl...

    Acid catalyzed acetal formation from the corresponding hemiacetal. Acetals, as already pointed out, are stable tetrahedral intermediates so they can be used as protective groups in organic synthesis. Acetals are stable under basic conditions, so they can be used to protect ketones from a base. The acetal group is hydrolyzed under acidic conditions.

  7. Main group organometallic chemistry - Wikipedia

    en.wikipedia.org/wiki/Main_group_organometallic...

    When the alkyl group bridges two main group elements, the bonding is called three-center two-electron bonds. This pattern is seen for dimethyl beryllium and trimethylaluminium. In the case of methyl lithium, the methyl group can be shared (bonded to) three Li centers. These bonding aspects influence the structures: Trimethylaluminium, dimethyl ...

  8. Acetylacetone - Wikipedia

    en.wikipedia.org/wiki/Acetylacetone

    Acetylacetone is a versatile bifunctional precursor to heterocycles because both keto groups may undergo condensation. For example, condensation with hydrazine produces pyrazoles while condensation with urea provides pyrimidines.

  9. Acetic anhydride - Wikipedia

    en.wikipedia.org/wiki/Acetic_anhydride

    As indicated by its organic chemistry, acetic anhydride is mainly used for acetylations leading to commercially significant materials. Its largest application is for the conversion of cellulose to cellulose acetate, which is a component of photographic film and other coated materials, and is used in the manufacture of cigarette filters.