| Popis: |
Ground-state rotational spectra of four isotopomers Ar ⋯ 79 Br 35 Cl , Ar ⋯ 81 Br 35 Cl , Ar ⋯ 79 Br 37 Cl and Ar ⋯ 81 Br 37 Cl of a complex involving argon and bromine monochloride were observed. Spectroscopic constants were interpreted on the basis of a linear species Ar⋯BrCl, with atoms in the indicated order and r( Ar ⋯ Br )=3.466 A . When intermolecular electron transfer was assumed negligible, the Br and Cl nuclear quadrupole coupling constants were interpreted to show that a fraction δ(Br→Cl)=3.5(5)×10−3 of an electron is transferred from Br to Cl on complex formation. The values k σ =2.79(1) N m −1 and k ββ =4.7(2)×10 −20 J rad −2 were established for the intermolecular stretching and bending quadratic force constants, respectively. |
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