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Polyether macrocycles, interlocking

The interlocking of secondary amines with polyether macrocycles enables amines to activate H2 in the presence of B(CgF5)3. DF calculations show that the amine-macrocycle complex both preorganizes a frustrated Lewis pair minimum for H2 activation and stabilizes the product through strong hydrogen bonds. ... [Pg.133]

This [2]catenane is composed of a jt-electron-deficient tetracationic cyclophane interlocked with a Jt-electron-rich macrocyclic polyether. In addition to a mechanical bond, [jt Jt] stacking interactions between the complementary aromatic units, [C-H---0] hydrogen bonds between the a-bipyridinium hydrogen atoms and the poly-ether oxygen atoms, and [C-H---Jt] interactions between the 1,4-dioxybenzene hydrogen atoms and the p-phenylene spacers in the tetracationic cyclophane hold the two macrocyclic components together and control their relative movements in solution. As a result of the asymmetry of the tetracationic cyclophane, two transla-... [Pg.226]

The use of interlocked polyether-diimine macrocycle ligand (Fig. 5) has interesting implications for the coordination of metal ions, especially those of iron [32]. [Pg.3953]


See other pages where Polyether macrocycles, interlocking is mentioned: [Pg.311]    [Pg.50]    [Pg.352]    [Pg.157]    [Pg.162]    [Pg.130]    [Pg.351]    [Pg.30]    [Pg.235]    [Pg.576]    [Pg.60]    [Pg.85]    [Pg.86]    [Pg.339]    [Pg.957]    [Pg.434]    [Pg.263]    [Pg.271]    [Pg.324]    [Pg.325]    [Pg.329]    [Pg.333]   
See also in sourсe #XX -- [ Pg.133 ]




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Interlocking

Interlocks

Macrocycles polyether

Macrocyclic polyethers

Polyether macrocycle

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