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Oxidative Coupling and Reductive Fragmentation

In oxidative coupling, Eq. 6.26, a metal couples two alkenes to give a metalacycle or two alkynes to give a metallole. Even CO and CN [Pg.180]

Alkynes undergo the reaction more easily than do alkenes unless activated by the substituents or by strain. C2F4 undergoes the reaction easily because F prefers the sp C-F of the product where the high electronegativity of F is better satisfied by the less electronegative sp carbon and repulsion between the F lone pairs and the C=C pi bond is relieved. [Pg.181]

Oxidative addition needs a metal that can undergo a 2e oxidation and a 2e (4e ionic model) change in electron count. [Pg.181]

Many mechanisms are seen (Table 6.3) concerted (Section 6.2), Sn2 (Section 6.3), radical (Section 6.4), and ionic (Section 6.5). Reductive elimination goes by the reverse of these mechanisms (Section 6.6). [Pg.181]

Sigma bond metathesis is an alternative pathway to oxidative addition followed by reductive elimination (Section 6.7). [Pg.181]


See other pages where Oxidative Coupling and Reductive Fragmentation is mentioned: [Pg.180]    [Pg.181]   


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Oxidants and reductants

Oxidation and reduction

Oxidation reductive coupling

Oxidative fragmentations

Oxidizer fragments

Reduction Reductive coupling

Reduction and Coupling

Reduction couple

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