Rotational analysis of the a⁴Σ^--X²Π and B²Σ⁺-X²Π band systems of the SnCl molecule

Measurement and analysis of the pure rotational spectra of tin monochloride, SnCl, using laser ablation equipped chirped pulse and cavity Fourier transform microwave spectroscopy

“…[2] as starting points for search regions on the chirped pulse spectrometer. Using this method, transitions were quickly found.…”

“…Analysis of the data began with the most abundant isotopologue 120 Sn 35 Cl because of the strength of the transitions in the spectra and the known parameters from Ref. [2]. Rotational parameters for the resultant assignments are presented in Table 1 for the four isotopologues and compared on both the instruments.…”

“…Spin-orbit coupling constants A and A D were not determined but needed for a satisfactory fit, so they were held to the values reported in Ref. [2]. A comparison of the individual fits to Ref.…”

“…Since that time, many subsequent spectroscopic studies of the title molecule have been performed [2][3][4][5][6]. One such work was a rotational analysis study of the molecule utilizing UV-vis spectroscopy by Badowski et al [2] where they measured and analyzed the a 4 R À À X 2 P band system and analyzed the band system B 2 R + À X 2 P previously observed by Chatalic et al [3]. To the authors knowledge, however, there is no microwave rotational spectra of the title molecule reported to date.…”

The pure rotational spectra of the open-shell diatomic molecules PbI and SnI

“…Looking at the electronic spectra of the other tin monohalide species, no low lying electronic states have been observed except for the X 2 Π 3/2 states which are ∼2400 cm −1 higher in energy than the X 2 Π 1/2 electronic state with the next lowest electronic state being over 15 000 cm −1 higher in energy so it is unlikely that coupling between electronic states is happening to the degree that would result in BOB. 19,20,33,34 It would be worthwhile to make a comparison of the BOB parameter with that obtained from SnCl, which has been studied previously using microwave spectroscopy. Unfortunately only transitions from the ground vibrational states of the different isotopologues were observed making a robust analysis of the BOB parameters impossible.…”