Gamma-radiolysis of CHI3 in 3-methylpentane at 77 K

Transient intermediates formed on γ-radiolysis of CHI 3 in 3-methylpentane glass at 77 K were characterized from the study of absorption spectra, changes induced by different scavengers, matrix viscosity, optical bleaching, photoionization of NNN'N'-tetramethyl-p-phenylenediamine, and identification of stable end products. Variation of stable products yields and intensity of absorption bands with solute concentration has been explained by solute aggregation at 77 K. It is concluded that the optical absorption bands at 450 and 600 nm are due to CHI + 3 and CHI 2 , respectively.