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Protonation, Oligomerization, and

Protonation, Oligomerization, and Condensation Reactions of Vanadate(V), Molybdate(VI), and Tungstate(VI)... [Pg.651]

PROTONATION, OLIGOMERIZATION, AND CONDENSATION REACTIONS OF VANADATE(V), MOLYBDATE(VI), AND TUNGSTATE(VI)... [Pg.127]

Protonation or Lewis acid complexation of a heteroatom invites nucleophilic attack, including nucleophilic attack by a parent molecule. Oligomerization and polymerization are thus often the results of bringing heterocycles into an acid environment without making sure that all of the potentially nucleophilic sites are protonated. [Pg.23]

Linear oligomerization and telomerization of butadiene take place with nickel complexes in the presence of a proton source (7). In addition, cooligomerization of butadiene with functionalized olefins such as methacrylate is catalyzed by nickel complexes [Eq. (4)] (12, 13) ... [Pg.143]

The protonation of substituted styrenes generally leads to sequential oligomerization and polymerization reactions (3). Only when carefully... [Pg.20]

An essential prerequisite for successful oligomerization and polymerization is a sufficiently strong base in solution to accept the protons from the a-intermediates. [Pg.615]

The silyl fragmentation in superacids initiated by a controlled temperature increase is a method to generate persistent carbocations, such as the vinyl cation 378, which are not accessible by direct protonation of unsaturated hydrocarbons because of excessive formation of oligomeric and polymeric products. [Pg.672]

See other pages where Protonation, Oligomerization, and is mentioned: [Pg.129]    [Pg.135]    [Pg.155]    [Pg.161]    [Pg.169]    [Pg.179]    [Pg.181]    [Pg.445]    [Pg.443]    [Pg.319]    [Pg.129]    [Pg.135]    [Pg.155]    [Pg.161]    [Pg.169]    [Pg.179]    [Pg.181]    [Pg.445]    [Pg.443]    [Pg.319]    [Pg.953]    [Pg.320]    [Pg.7]    [Pg.240]    [Pg.274]    [Pg.274]    [Pg.478]    [Pg.610]    [Pg.508]    [Pg.420]    [Pg.228]    [Pg.320]    [Pg.907]    [Pg.953]    [Pg.659]    [Pg.138]    [Pg.370]    [Pg.123]   


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Protonation, Oligomerization, and Condensation Reactions

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