The Cage Structure of IndanCHF₃ is Based on the Cooperative Effects of CH⋅⋅⋅π and CH⋅⋅⋅F Weak Hydrogen Bonds

Abstract

The structural and energetic features of the C-H⋅⋅⋅π interaction and the internal dynamics of the CHF3 group change drastically in going from benzene-CHF3 to indan-CHF3 , according to the analysis of the rotational spectrum of the latter complex generated in a supersonic expansion.

Construction and interconversion of anion-coordination-based (‘aniono’) grids and double helicates modulated by counter-cations

“…A broad array of discrete structures has been constructed based on metal-coordination-driven assembly, such as helicates, polygons, polyhedra, cages, and interlocked metallo-supramolecules 2. Meanwhile, such architectures can be accessed by (dynamic) covalent bonding3 or hydrogen bonding 4. During the assembling process, interconversion between two topologies in some systems, e.g.…”

Anion-Coordination-Driven Assembly of Chiral Quadruple and Single Helices Controlled by Countercations

“…Helical structures are a particularly important class of supramolecular motifs both in biosystems and in functional materials . Chemists have designed numerous artificial helical systems that can serve as mimics of biological molecules or exhibit unique properties, including discrete and/or infinite single-stranded (foldamer), , double-, , triple-, , and multiple-stranded, , as well as circular helices. , Different strategies, such as metal coordination, hydrogen bonding, , π-stacking, , etc., were used to construct these structurally elegant systems, among which the metal-coordination-driven assembly of the metallo-helicates is perhaps the most widely applied one.…”

Chlorine “Equatorial Belt” Activation of CF3Cl by CO2: The C···Cl Tetrel Bond Dominance in CF3Cl–CO2

“…In addition, secondary interactions (the bifurcated O···F 2 HaB and the C···O TB) are significant, because the spectral features do not include effects of the internal rotation of the CF 3 group. This implies a barrier to internal rotation V 3 > 50 cm –1 . Correspondingly, at least 0.6 kJ mol –1 are contributable to these secondary NCIs.…”

“…This implies a barrier to internal rotation V 3 > 50 cm −1 . 53 Correspondingly, at least 0.6 kJ mol −1 are contributable to these secondary NCIs.…”