Thea1Δ(a2) States of BiCl, BiBr, and BiI

Theb1Σ+(b0+) →X3Σ−(X10+,X21) anda1Δ(a2) →X21 Transitions of SbF, SbCl, SbBr, and SbI

“…Within the error limits, the new data agree with the less accurate results of our previous measurements performed with low-resolution monochromators (14,15). The T e and e values show similar systematic trends like in the previously studied bismuth halides (9). For 121 SbF, our results are in good agreement with the literature data summarized by Prévot et al (11).…”

“…Stimulated by theoretical predictions of rather large transition probabilities of the a2 3 X 2 1 transitions of several heavy atom-containing hydrides and halides (BiH (6), BiI (7), SbI (8)), we have searched for such transitions of the bismuth, antimony, and arsenic halides in chemiluminescence systems and dc discharges. In a previous paper, we reported on the observation of the a2 3 X 2 1 spectra of BiCl, BiBr, and BiI with a Fourier-transform spectrometer (9). In continuation of this work, we have also found the a2 3 X 2 1 transitions of all four antimony halides.…”

The b1Σ+(b0+)→ X3Σ−(X10+,X21) and a1Δ(a2)→X21 transitions of AsBr

“…Within the error limits, the new data for the X 1 and b states agree with the less accurate results of our previous lowresolution measurements [3]. The ratios of the T e and x e values of the X 1 0 + , a2, and b0 + states are similar to those in the previously studied BiX [4], SbX [5], and AsI [6] molecules. Table 5 Molecular parameters used in the simulation of the 0-0 bands of the b 1 R + fi X 3 R À and a 1 D fi X 3 R À transition of AsBr (in cm À1 ) 2.29 T rot ( 0 K) 300 300 l 0 /l 1 7.7 Fig.…”

“…The experimental set-up was the same as that used in recent studies of the NIR spectra of AsI [6] and of bismuth and antimony halides [4,5]. Arsenic sponge was heated to about 650 K in a flow of argon carrier gas, Fig.…”

“…As in preceeding work on BiX [4], SbX [5] (X = F, Cl, Br, and I), and AsI [6] the main emphasis lay on the search for emissions from the hitherto unknown a 1 D(a2) state of the molecule.…”