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Kinetic template reactions imine metal complexes

The most important reaction of this type is the formation of imine bonds and Schiff bases. For example, salicylaldehyde and a variety of primary amines undergo reaction to yield the related imines, which can be used as ligands in the formation of metal complexes. However, it is often more desirable to prepare such metal complexes directly by reaction of the amine and the aldehyde in the presence of the metal ion, rather than preform the imine.113 As shown in Scheme 31, imine formation is a reversible process and isolation of the metal complex results from its stability, which in turn controls the equilibrium. It is possible, and quite likely, that prior coordination of the salicylaldehyde to the metal ion results in activation of the carbonyl carbon to amine nucleophilic attack. But it would be impossible for a precoordinated amine to act as a nucleophile and consequently no kinetic template effect could be involved. Numerous macrocyclic chelate systems have been prepared by means of imine bond formation (see Section 61.1.2.1). In mechanistic terms, the whole multistep process could occur without any geometrical influence on the part of the metal ion, which could merely act to stabilize the macrocycle in complex formation. On the other hand,... [Pg.434]


See other pages where Kinetic template reactions imine metal complexes is mentioned: [Pg.153]    [Pg.7200]    [Pg.153]    [Pg.7200]    [Pg.23]    [Pg.450]    [Pg.312]   
See also in sourсe #XX -- [ Pg.185 , Pg.186 , Pg.187 , Pg.188 , Pg.189 , Pg.190 , Pg.191 ]

See also in sourсe #XX -- [ Pg.185 , Pg.186 , Pg.187 , Pg.188 , Pg.189 , Pg.190 , Pg.191 ]

See also in sourсe #XX -- [ Pg.6 , Pg.185 , Pg.186 , Pg.187 , Pg.188 , Pg.189 , Pg.190 , Pg.191 ]




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Complexation kinetics

Imine complexes

Imine reaction

Imines kinetic template reactions

Imines metal complexes

Imines metalated

Imines metalation

Imines metallated

Imines, reactions

Kinetic complexity

Kinetic imine

Kinetic template reactions

Kinetic templation

Kinetics complexes

Metal complexes reactions

Metal template reactions

Metal template reactions kinetic

Metal templates

Template complexes

Template kinetic

Template reactions

Templated reactions

Templating metal

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