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Rate determining step benzidine rearrangement

Secondly, it has been found that the benzidine rearrangement is subject to a solvent isotope effect d2o/ h2o > 1- If a proton is transferred from the solvent to the substrate in a rate-determining step the substitution of protium by deuterium will lead to a retardation in the rate of reaction (primary isotope effect) whereas if a proton is transferred in a fast equilibrium step preceeding the rate-determining step as in... [Pg.441]

Diaminobiphenyl is formed by a completely different mechanism, though the details are not known. There is rate-determining breaking of the N—N bond, but the C—C bond is not formed during this step. The formation of the o-semidine also takes place by a nonconcerted pathway. Under certain conditions, benzidine rearrangements have been found to go through radical cations. [Pg.1456]

See other pages where Rate determining step benzidine rearrangement is mentioned: [Pg.452]    [Pg.503]    [Pg.899]    [Pg.900]    [Pg.905]    [Pg.910]    [Pg.917]    [Pg.232]    [Pg.233]    [Pg.238]    [Pg.243]    [Pg.250]    [Pg.185]    [Pg.897]    [Pg.435]    [Pg.1146]    [Pg.230]    [Pg.143]    [Pg.35]   
See also in sourсe #XX -- [ Pg.1680 ]



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Benzidines, determination

Determining step

Rate determining step

Rate-determinating step

Rates determination

Rates rate determining step

Rearrangements benzidine

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