alkyl radical การใช้

• However, they undergo rapid decarbonylation to afford the alkyl radical.
• The ability of Selectfluor to transfer fluorine to alkyl radicals has recently been demonstrated.
• The oxyferryl radical takes the hydrogen from carbon-24 to create an alkyl radical intermediate.
• In the presence of oxygen, the alkyl radical is trapped and forms an organic peroxy radical.
• The cholesterol alkyl radical then combines with the activated oxygen on the heme to create 24S-hydroxycholesterol.
• In the absence of other radical sources or other proximal reactive groups, the alkyl radical recombines with the nitrosyl radical.
• In the primary reaction product the intermediate alkyl radical is then captured by the diazonium counterion X which is usually a halogen or a tetrafluoroborate.
• Pyrolysis yields elemental lead and alkyl radicals; their interreaction causes the synthesis of HEDL . They also decompose upon sunlight or UV-light.
• The alkyl radical formed after hydrogen atom transfer is susceptible to standard radical reactions when scavengers are present in sufficient excess to outcompete the nitrosyl radical.
• Oxidation of a radical clock substrate, norcarane, produced significant amounts of radical rearranged products, suggesting the presence of a long-lived free alkyl radical.
• The use of metal alkyls, e . g . triethylaluminium and diethylzinc as the reducing agent leads to the oxidative coupling of the alkyl radical to the dimer:
• The first option is to dissociate its three alkyl radicals by acquiring thermal energy from the surface, and leaving behind the elemental group III atoms on the surface.
• Large excesses of activated alkenes can be used to intercept the alkyl radical and results in formation of a C-C bond from an unactivated C-H bond.
• Subsequently, single-electron oxidation of the alkyl radical generated by this addition produces a cation which can be trapped by water, an alcohol, or a nitrile.
• Isotopic labeling of the nitrite with 15N has shown the mechanism non- caged and that the nitrosyl radical formed from a given nitrite recombines randomly with other alkyl radicals.
• The radical mechanism starts with abstraction of the hydrogen atom from the substrate to form QH ( the rate determining step ), hydroxyl bridged compound Q and the free alkyl radical.
• The fate of this radical in the troposphere is dependent on factors such as the amount of sunlight, pollution in the atmosphere and the nature of the alkyl radical that formed it.
• This lack of tight radical pairing is also supported by the observation that alkyl radicals generated by Barton conditions can undergo radical cyclization while analogous intermediates generated by lead tetraacetate oxidation do not.
• One mechanism invokes the single-electron oxidation of the olefin, trapping the radical cation by a pendant hydroxyl or amine functional group, and quenching the resulting alkyl radical by H-atom transfer from a highly labile donor species.
• "' Primary "'is a term used in organic chemistry to classify various types of compounds ( e . g . alcohols, alkyl halides, amines ) or reactive intermediates ( e . g . alkyl radicals, carbocations ).