Non-linearity of weak B⋯H–C hydrogen bonds: an investigation of a complex of vinyl fluoride and ethyne by rotational spectroscopy

Crystal packing of 8,9,10,12-tetrafluoro-o-carborane: H...F versus H...H contacts

“…These results are in line with the values, given above for the F...H intermolecular interactions [1][2][3][4][5][6][7][8][9]. As one could expect from the analysis of the charges, the strongest interaction was found in the case of the hydrogen Table 2).…”

“…The role of C-H...F contacts in the supramolecular organization was the subject of both experimental [1][2][3][4][5][6] and theoretical [7][8][9] investigations. In contrast to the conventional C-H...O interaction, the H-bonding nature of the H...F is reflected only in the case of highly acidic hydrogen atoms and by the absence of competing acceptors [1].…”

Microwave spectrum and molecular structure of the 1-chloro-1-fluoroethylene-hydrogen fluoride complex

“…We restrict the different configurations of the complex to be planar, as observed spectroscopically for those of fluoroethylenecontaining complexes [1,[3][4][5][6][7][8][9][10][11][12] and for 1-chloro-1-fluoroethylene-HCCH [2]. The monomer geometries are held at their average values in the ground vibrational states [14,15].…”

“…Our earlier work was aided by the comparison of structures, both from our own laboratory and those determined by the Legon group, for complexes of the fluoroethylenes, vinyl fluoride, 1,1-difluoroethylene, and 1,1,2-trifluoroethylene on the one hand, with a series of protic acids: hydrogen fluoride (HF) [3][4][5], hydrogen chloride (HCl) [6][7][8][9], and acetylene (HCCH) [10][11][12], on the other. In each case, as well as for trans-1,2-difluoroethylene-HF [1] and 1-chloro-1-fluoroethylene-HCCH [2], the complexes adopt a planar structure containing two non-covalent interactions: a primary, hydrogen bonding interaction between the protic acid and a fluorine atom on the substituted ethylene, and a secondary interaction, made possible by a deviation of the hydrogen bond from linearity, between a hydrogen atom in the substituted ethylene and the nucleophilic portion of the acid.…”

A chirped pulse Fourier transform microwave study of the refrigerant alternative 2,3,3,3-tetrafluoropropene

“…Building upon initial work from the Legon group, structures have been determined for the complexes formed between, on the one hand, hydrogen fluoride (HF), hydrogen chloride (HCl), and acetylene (HCCH) with vinyl fluoride [8][9][10][11], 1,1-difluoroethylene [12][13][14], and 1,1,2-trifluoroethylene [15][16][17] on the other. We have also determined the structure of the trans-1,2-difluoroethylene-HF complex [18].…”