Ultra-violet spectra of SeBr and TeI

Abstract

An absorption spectrum in the range 200–220 nm, observed during the flash photolysis of Se₂Br₂, is attributed to SeBr. A vibrational analysis gives the following parameters of the states involved: X(²Π_i): T_e= 0 and 1070+a cm^–1; ω_e= 317 cm^–1, ω_ex_e= 0.7 cm^–1, B: T_e= 47 227 and 47 227+a cm^–1; ω_e= 393 cm^–1, ω_ex_e= 2.0 cm^–1.

An absorption spectrum due to TeI in the range 220–250 nm has been recorded in the flash photolysis of TeI₂. The vibrational constants of the various states involved are: X(²Π_i): T_e= 0; ω_e= 217 cm^–1, ω_ex_e= 0.6 cm^–1. B: T_e= 41 057 cm^–1; ω_e= 260 cm^–1, ω_ex_e= 1.4 cm^–1. C: T_e= 43 658 cm^–1; ω_e= 252 cm^–1, ω_ex_e= 0.5 cm^–1.