15min:

MARILYN E. JACOX AND WARREN E. THOMPSON, Optical Technology Division, National Institute of Standards and Technology, Gaithersburg, MD 20899-8441.

When a Ne:H₂:SO₂ mixture is codeposited at 4.2 K with a beam of neon atoms that have been excited in a microwave discharge, the resulting solid deposit has infrared absorptions characteristic of several neutral and ionic products. Among these are HSO₂ and cis -HOSO, recently identified among the products of the reaction of photoproduced H atoms with SO₂ in the heavier rare gas matrices . The assignments and the photoisomerization behavior reported in the earlier study are supported by the neon-matrix observations, which include studies of the sulfur-34 and oxygen-18 substituted species. After photodestruction of the HSO₂ and cis -HOSO, slight warmup of the deposit to induce H-atom migration leads to regeneration of HSO₂.