Reactions of pulsed-laser evaporated aluminum atoms with oxygen: infrared spectra of the reaction products in solid argon

Reactions of pulsed-laser evaporated Al atoms with O 2 in a condensing argon stram gave cyclic-AlO 2 at 496.3 cm -1 as the major product. In addition sharp new absorptions at 1211.2, 1176.3, and 1129.5 cm -1 are identified on the basis of isotropic shifts and multiplets as linear OAlOAlO, AlOAlO, and OAlO, respectively. The identification of linear OAlOAlO and AlOAlO was confirmed by MP2 calculations of isotropic frequencies.