The microwave spectrum and molecular structure of the furan–argon complex

Rotational spectra of pyridine-(argon)n, n = 1, 2, complexes and their vibrationally averaged structures

“…As depicted in Figure 1, R measures the distance between the center-of-mass of the aromatic monomer and the rare gas atom and 8 refers to the angle between R and the principal axis c of the aromatic monomer. The same parameters will be used for the [1,1] complex between an aromatic molecule and two rare gas atoms located symmetrically on both sides of the aromatic ring plane. Because the labeling of the principal axis system of the complex Numbers in parentheses represent one standard deviation.…”

Chemistry at Low Pressure and Low Temperature: Rotational Spectrum and Dynamics of Pyrimidine-Neon

“…Let us consider, for the sake of simplicity, only complexes with aromatic unsubstituted rings. Only adducts with Ar have been studied with MBMWFT for the three prototype five-membered aromatic compounds, furan (furanAr [11] was the first observed adduct of a rare gas with a cyclic molecule), pyrrole, [12] and thiophene, [13] and for some other five-membered molecules with two heteroatoms.…”

Apparent conflicting indications on the conformation of dimethylether–argon from the rotational spectra of the d6 and 13C species

“…Among them, the adducts with aromatic rings have been found to be rather stable, with dissociation energy (E B ) in the order of 3-4 kJ/mol [2][3][4][5][6]. Their conformations are well defined, with the Ar atom well located on one side of the ring.…”