Sanakirja
Tekoälykääntäjä
Kuvat
8
| Kieli | Käännökset |
|---|---|
| italia | alchilazione |
| portugali | alquilação |
| ranska | alkylation |
| saksa | Alkylierung |
| suomi | alkylointi, alkylaatio |
Määritelmät
Substantiivi
Taivutusmuodot
| Monikko | alkylations |
Luokat
(organic chemistry) Any reaction in which an alkyl group is added to a molecule; used in the production of high-octane petroleum fuels.
Typical route for alkylation of benzene with ethylene and ZSM-5 as a heterogeneous catalyst
(organic chemistry) Any reaction in which an alkyl group is added to a molecule; used in the production of high-octane petroleum fuels.
The Kumada coupling employs both a nucleophilic alkylation step subsequent to the oxidative addition of the aryl halide (L = Ligand, Ar = Aryl). The starting material, an aryl bromide (Ar-Br) reacts with nickel with ligands (NiL2). Then, a Grignard reagent (R-MgBr) alkylates the nickel center, replacing the bromide ligand (Br) with an alkyl ligand (R). This nickel-aryl-alkyl complex undergoes rearrangement and reductive elimination to expel an alkylated aryl (Ar-R). The outcome of this reaction is that the aryl group (Ar) is alkylated with an alkyl group (R), replacing bromide (Br), creating an alkylated aryl (Ar-R), the intended product. The bromide is expelled as magnesium bromide (MgBr2). Nickel with ligands (NiL2) acts as the catalyst, being reused multiple times.
