Attractive fluorine···fluorine interactions between perfluorinated alkyl chains: a case of perfluorinated Cu(II) diiminate Cu[C2F5–C(NH)–CF=C(NH)–CF3]2

A synthesis of the perfluorinated copper diiminate complex Cu[C2F5–C(NH)–CF=C(NH)–CF3]2 (3) and its self-assembly into infinite 1D chains in the crystal via Type II C(sp3)–F···F–C(sp3) contacts between perfluoroethyl substituents is reported. Rare Type II F···F interactions were studied by DFT calculations and topological analysis of the electron density distribution within the formalism of Bader’s theory (QTAIM method). This is the first report which discusses Type II contacts between perfuoroalkyl chains.

Switching the type of V-loop in sugar-modified G-quadruplexes through altered fluorine interactions

The interplay of specific fluoro interactions determines conformational features of G-quadruplexes with two different 2′-fluoro-substituted residues.

The mechanism of bending in a plastically flexible crystal

The mechanism of plastic deformation in crystals of a trifluoromethylated benzamide derivative has been determined with micro-focused X-ray diffraction. Fuorine–fluorine interactions are propose to mediated the observed mechanical behaviour.

Supramolecular assembly of lanthanide-2,3,5,6-tetrafluoroterephthalic acid coordination polymers via fluorine⋯fluorine interactions: a platform for luminescent detection of Fe3+ and nitroaromatic compounds

F⋯F interactions stabilize {[Ln(TFTA)1.5(H2O)2]·H2O}n 2D coordination polymers which selectively detect Fe3+ and p-nitrophenols.

Self-healing, luminescent metallogelation driven by synergistic metallophilic and fluorine–fluorine interactions

Aggregation and self-assembly of terpyridine platinum(ii) complex with fluorinated alkyl substituent, driven by synergistic metallophilic and fluorophilic interactions, result in formation of a robust, self-healing, and luminescent gel.

Nature of fluorine interactions in ‘wheel and axle’ topology based hexa-coordinated Sn(iv)-porphyrins: an experimental and theoretical analysis

The experimental and theoretical investigations on Sn(iv)-tetrapyridylporphyrins demonstrate that ‘Gulliver effect’ has to be taken into consideration in explaining the genesis of F-based intermolecular interactions.