6533b834fe1ef96bd129e0db
RESEARCH PRODUCT
Chasing Weak Forces: Hierarchically Assembled Helicates as a Probe for the Evaluation of the Energetics of Weak Interactions.
Markus AlbrechtLaura KempChristoph A. SchalleyKari RissanenWolfgang Hubertus RathJan M. WollschlägerChristoph RäuberDavid Van CraenArto ValkonenMarina Huthsubject
sondit010405 organic chemistryChemistryStereochemistryDirect observationhelicatesGeneral ChemistryWeak interactioninteractions010402 general chemistry01 natural sciencesBiochemistryLondon dispersion forceCatalysis0104 chemical scienceschemistry.chemical_compoundColloid and Surface ChemistryMonomerContact surfacesChemical physicsweak forcesMoleculeSolvent effectsprobesta116description
London dispersion forces are the weakest interactions between molecules. Because of this, their influence on chemical processes is often low, but can definitely not be ignored, and even becomes important in cases of molecules with large contact surfaces. Hierarchically assembled dinuclear titanium(IV) helicates represent a rare example in which the direct observation of London dispersion forces is possible in solution even in the presence of strong cohesive solvent effects. Hereby, the dispersion forces do not unlimitedly support the formation of the dimeric complexes. Although they have some favorable enthalpic contribution to the dimerization of the monomeric complex units, large flexible substituents become conformationally restricted by the interactions leading to an entropic disadvantage. The dimeric helicates are entropically destabilized. peerReviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-01 | Journal of the American Chemical Society |