Fourier Transform Spectroscopy of the ν3and ν6Bands of D3Si35Cl: Rovibrational Constants of thev= 0,v3= 1, andv6= 1 States

High-Resolution Spectrum and Rovibrational Analysis of the ν2/ν5 Dyad of D3SiF near 700 cm−1

“…The v 3 ϭ 1, v 6 ϭ 1 Ϯ1 , and v 6 ϭ 2 0,Ϯ2 excited states parameters have been also precisely determined in that study. In spite of the fact that the 2 / 5 dyad is located between 3 ( A 1 , 888.899 cm Ϫ1 ) and 6 (E, 550.453 cm Ϫ1 ), we have demonstrated in (1) that it is not necessary to treat all these bands together in a polyad as it was recently done for the H 3 SiF isotopomer (2). On the other hand, here the situation is made more complex by the small difference between the 2 and 5 band centers, ca.…”

“…We may remark that in the study of Papoušek et al on H 3 SiF (2), although they used a more elaborate model, involving the 6 / 3 / 5 / 2 tetrad, similarly large variations of the H's are encountered, so that it is not likely that our effective H's are above all due to the neglect of this tetrad. We have carefully checked possible candidates for intervibrational perturbations due to 6 , i.e., k ⅐ l ϭ Ϫ12 and Ϫ13 in 5 , and K ϭ 19 and 20 in 2 , but we did not find any indication for such a perturbation. Note that no perturbation was found in the corresponding series of 6 (1).…”

“…D 3 SiI was prepared as described in (6). Since the LiAlD 4 had a deuteration enrichment of 99%, our D 3 SiF sample was unavoidably contaminated by ca.…”

“…different K values in the ground state, we looked for forbidden transitions like S (P, Q, R) 2,3 ( J) with ⌬K ϭ ϩ2 and N (P, Q, R) 5,6 ( J) with ⌬K ϭ Ϫ3 and found them. Figure 2b shows the spread Q Q 3 (15,16,17) lines of 2 with the S Q 3 (11,12,13,14) transitions.…”

Spectroscopie infrarouge de la molécule ²⁸SiD₃F autour de 888 cm^-1

“…SiD 3 I a été préparé selon la procédure décrite dans la Réf. [8]. Le spectre infrarouge de la bande fondamentale ν 3 utilisé a été enregistré sur le spectromètre à transformée de Fourier de type Bruker 120 HR [9] .…”