Infrared spectra of cyclic-O-6(+) and trans-O-6(+) in solid neon and argon

Charged transient species in the oxygen system have been trapped in solid a rgon and neon using electron impact, Townsend discharge, and laser-ablation methods. The previously identified O-3(-), O-4(-), and O-4(+) species are observed in these experiments. Absorptions at 1435.0 and 1429.5 cm(-1) in s olid neon are characterized as cyclic-O-6(+) and trans-O-6(+), respectively , on the basis of annealing behavior, isotopic substitution, multiplet stru cture in mixed O-16(2) + O-18(2) experiments, and density functional calcul ations. Cyclic-O-6(+) is observed at 1416.1 cm(-1) in solid argon, a smalle r displacement than found for cyclic-O-4(+) in solid argon. (C) 1999 Americ an Institute of Physics. [S0021-9606(99)30518-3].