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- W2238173725 endingPage "1376" @default.
- W2238173725 startingPage "1366" @default.
- W2238173725 abstract "Active metal template Glaser coupling has been used to synthesize a series of rotaxanes consisting of a polyyne, with up to 24 contiguous sp-hybridized carbon atoms, threaded through a variety of macrocycles. Cadiot–Chodkiewicz cross-coupling affords higher yields of rotaxanes than homocoupling. This methodology has been used to prepare [3]rotaxanes with two polyyne chains locked through the same macrocycle. The crystal structure of one of these [3]rotaxanes shows that there is extremely close contact between the central carbon atoms of the threaded hexayne chains (C···C distance 3.29 A vs 3.4 A for the sum of van der Waals radii) and that the bond-length-alternation is perturbed in the vicinity of this contact. However, despite the close interaction between the hexayne chains, the [3]rotaxane is remarkably stable under ambient conditions, probably because the two polyynes adopt a crossed geometry. In the solid state, the angle between the two polyyne chains is 74°, and this crossed geometry appears to be..." @default.
- W2238173725 created "2016-06-24" @default.
- W2238173725 creator A5033112387 @default.
- W2238173725 creator A5049602108 @default.
- W2238173725 creator A5062945473 @default.
- W2238173725 creator A5067834045 @default.
- W2238173725 creator A5075655472 @default.
- W2238173725 creator A5087369600 @default.
- W2238173725 date "2016-01-26" @default.
- W2238173725 modified "2023-10-12" @default.
- W2238173725 title "Polyyne Rotaxanes: Stabilization by Encapsulation" @default.
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