Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Atom abstraction, photoinitiated reactions

Figure 6.10 Two examples of free radical photoinitiation reactions dissociation of dioxolane and hydrogen atom abstraction of anthraquinone in tetrahydrofuran... Figure 6.10 Two examples of free radical photoinitiation reactions dissociation of dioxolane and hydrogen atom abstraction of anthraquinone in tetrahydrofuran...
R CHORj. Such radicals have been formed by hydrogen atom abstraction from the ether by radicals produced from thermal decomposition of peroxides (67, 75, 76). Similar radicals may be produced in photochemical processes, either by direct irradiation (29, 54), or by the use of a photosensitizer or a photoinitiator, such as acetone or benzophenone (21, 64, 66). The ether radicals once produced, participate in a variety of chemical reactions. It might be noted that resonance forms as illustrated... [Pg.101]

The main requirements of a solvent to be utilized in SRN1 reactions are that (1) it should dissolve both the organic substrate and the ionic alkali metal salt of the nucleophile (2) it should not have hydrogen atoms that can be readily abstracted by aryl radicals (3) there must not be protons that can be ionized by the bases or the basic nucleophiles and radical anions involved in the reaction and (4) it should not undergo ET reactions with the various intermediates of the reaction. In addition to these requirements, the solvent should not absorb significantly in the wavelength range normally used in photoinitiated reactions (300-400 nm). [Pg.502]

See other pages where Atom abstraction, photoinitiated reactions is mentioned: [Pg.46]    [Pg.401]    [Pg.66]    [Pg.39]    [Pg.86]    [Pg.95]    [Pg.97]    [Pg.191]    [Pg.191]    [Pg.357]    [Pg.416]    [Pg.413]    [Pg.182]    [Pg.990]    [Pg.202]    [Pg.248]    [Pg.357]    [Pg.50]    [Pg.230]    [Pg.431]    [Pg.138]    [Pg.53]    [Pg.59]    [Pg.458]    [Pg.470]    [Pg.230]    [Pg.247]    [Pg.103]    [Pg.219]    [Pg.68]    [Pg.68]    [Pg.334]    [Pg.448]    [Pg.425]    [Pg.3938]    [Pg.5594]    [Pg.329]    [Pg.566]    [Pg.921]    [Pg.396]    [Pg.283]   
See also in sourсe #XX -- [ Pg.66 , Pg.67 , Pg.68 , Pg.69 , Pg.70 , Pg.71 , Pg.72 , Pg.73 , Pg.74 ]



SEARCH



Abstraction reaction

Atom abstraction reaction

Atom abstractions

Photoinitiated

Photoinitiated reactions

Photoinitiation

Photoinitiator

Photoinitiators

© 2024 chempedia.info