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Triplet molecular bridge

High quantum and chemical yields of ODPM rearrangements are obtained with substrates in which the ly-enone chromophore is part of a conformationally rigid molecular assembly which at the same time guarantees adequate orbital overlap of the C=C and rr-bonds. Whereas in bicyclic and bridged 3, y-unsaturated ketones these prerequisites are widely met, acyclic p,7-unsaturated ketones usually rearrange inefficiently since other channels of energy dissipation from the triplet state predominate. Exceptions to this rule are substrates in which the C= ir-bond is part of a styrene or an a, -enone moiety (Section 2.6.3.1). In this context it should also be noted that p,7-unsaturated aldehydes, except for one case, are ODPM unreactive (Section 2.6.3.2). [Pg.218]

See other pages where Triplet molecular bridge is mentioned: [Pg.546]    [Pg.23]    [Pg.45]    [Pg.645]    [Pg.193]    [Pg.193]    [Pg.123]    [Pg.40]    [Pg.193]    [Pg.193]    [Pg.565]    [Pg.287]    [Pg.179]    [Pg.266]    [Pg.34]    [Pg.3]    [Pg.39]    [Pg.109]    [Pg.35]    [Pg.36]    [Pg.45]    [Pg.23]    [Pg.25]    [Pg.68]    [Pg.150]    [Pg.28]    [Pg.217]    [Pg.280]    [Pg.2476]    [Pg.71]    [Pg.217]    [Pg.208]    [Pg.367]    [Pg.438]    [Pg.172]    [Pg.504]    [Pg.350]    [Pg.2475]    [Pg.219]    [Pg.1025]    [Pg.2404]    [Pg.9]    [Pg.910]    [Pg.2743]    [Pg.592]    [Pg.592]    [Pg.208]    [Pg.344]    [Pg.218]   
See also in sourсe #XX -- [ Pg.39 ]



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Molecular bridge

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