Internal rotation effects in the pulsed jet rotational spectrum of the trifluoromethane–carbon dioxide dimer

How CO2 Interacts with Carboxylic Acids: A Rotational Study of Formic Acid–CO2

“…Similar behaviour has been found in the complexes of CO 2 with rare gases (Ne, Ar, Kr, Xe), [8 , 9] and in those with Hg,10 water,11 ammonia,12 pyridine,13 dimethylether,14 and sulphur dioxide 15. More complex molecules, such as formaldehyde,16 methanol,17 propylene oxide,18 ethylene oxide and ethylene sulphide,19 trifluoromethane,20 and difluoromethane,21 clamp the CO 2 molecule through both kind of bonds, with the O⋅⋅⋅C interaction being the leading one.…”

Reduced bandwidth chirped-pulse microwave spectroscopy for analysis of weakly bound dimers: Rotational spectrum and structural analysis of CH2ClF⋯FHCCH2

“…This behavior is common for species with C s symmetry in which only hydrogen or fluorine atoms extend out of the symmetry plane [4,5,12,13,[20][21][22]26]. All fits (including the fit of all three moments of inertia) gave similar structural parameters; however, the fit to I b and I c had the lowest rms deviation, so that is our preferred structure.…”

“…Weakly bound dimers serve as prototype systems for weak CAHÁ Á ÁX interactions, where the polarity of the CAH bond can be tuned by varying the number and type of electronegative substituents to the carbon atom. While many studies have focused on complexes of CH 3 F [1][2][3], CH 2 F 2 [4][5][6][7][8][9][10][11], and CHF 3 (for example: [2,[12][13][14][15][16][17][18][19]) as the proton donor, more recent investigations have examined a variety of hydrochlorofluorocarbons as CAH donors [20][21][22][23][24][25]. In most of the halogenated methane complexes, cyclic structures have been observed in which a halogen atom also acts as a weak hydrogen bond acceptor.…”

“…At Eastern Illinois University (EIU), we have recently investigated a series of dimers of CH 2 F 2 [4,6,7], CHF 3 [12][13][14], CH 2 ClF [21,24], CHClF 2 [20,22] (and CHBrF 2 [26]) with acetylene and ethylene. All species in this series that have been studied so far have displayed weak CAHÁ Á Áp interactions.…”

Characterization of C–H⋯π interactions in the structure of the CHClF2–HCCH weakly bound complex

“…Weak C-HÁ Á ÁX interactions, where X is an electronegative element such as oxygen or fluorine or a p system such as is found in acetylene, have been observed increasingly in chemical systems in recent years. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] These interactions have been shown to be important in many fields such as medicinal chemistry, drug design, biochemistry, nanotechnology, and the development of molecular machines. 19,20 Although there is an increasing body of research on C-HÁ Á ÁX interactions, many of the previous investigations have utilized X-ray diffraction, and thus provide data on interactions in solid state samples.…”