The rotational constants of methyl lodide

Ground State Rotational Constants of13CD3I

“…When the present results are compared to those obtained in (2) the parameters in Table 5 Table 4 together with residuals originating from the fit ac-REFERENCES cording to Eq. [7]. The error limits in Table 4 …”

Rotational Hyperfine Structure of CD3I

“…First a weighted least-squares method was used to directly fit the frequencies of Table 1 and [1][2][3] to the parameters of (1), (2) and (3). The results of the fit are given in the first column of Table 2.…”

“…Parallely to that work, Osipov and Grabois [4] have measured with great accuracy low J quadru pole transitions by microwave-radiofrequency double resonance. The hyperfine constants they have derived are much more accurate than those of [2,3], but they are also somewhat different. As these authors do not give their frequency measure ments, it is not possible to simultaneously fit all the experimental data in order to check the compati bility of the results.…”

“…They have also been able to point out the effects of the centrifugal distortion on the quadrupole hyperfine structure. Recently the measurements have been extended into the submillimeter region, up to 650 G H z [3] permitting to determine the sextic centrifugal distortion constants H j, H JK and H KJ. Parallely to that work, Osipov and Grabois [4] have measured with great accuracy low J quadru pole transitions by microwave-radiofrequency double resonance.…”

Experimental Gas-phase Halogen Nuclear Quadrupole Coupling Constants; A Review

“…The apparently most accurate data for the two isotopic ground state constants are 79 Br: +577.137(9) MHz and 81 Br: +482.13 (14) MHz. Finally, the large quadrupole splitting in the microwave spectrum of iodo-compounds has enabled the magnetic hyperfine structure and nuclear shielding tensors for the 127 I nuclear quadrupole coupling constants in iodomethane and its trideutero derivative [42][43][44][45][46][47][48] …”