Ultra-violet absorption spectra of germanium monobromide and tin monobromide

Abstract

Absorption spectra of GeBr and SnBr have been photographed during the flash photolysis of GeBr₄ and SnBr₄. The spectrum of GeBr consists of the B²Σ–X²Π system between 280 and 320 nm and numerous new bands below 250 nm. The bands have been analyzed into several systems, the most prominent of which have the following parameters. State C: T_e= 41 046 cm^–1(relative to X²Π_½). ω_e= 359 cm^–1, ω_ex_e= 3 cm^–1, A= 110 cm^–1. State E: T_e= 44 805 cm^–1, ω_e= 366 cm^–1, ω_ex_e= 5 cm^–1, A∼0. State G: T_e= 47 544 cm^–1, ω_e= 358 cm^–1, ω_ex_e= 1.5 cm^–1.

The spectrum of SnBr contains bands of the B²Σ—X²Π systems and a number of new band systems below 250 nm, the analyses of which are discussed.