Abstract
Laser-ablated Sc atoms and ions react with CO molecules to give primarily the ScCO, ScCO-, and ScCO+ products, which have been isolated in solid argon and/or neon matrices. Based on isotopic substitution as well as density functional calculations, absorptions at 1834.2 cm-1 in argon and 1851.4 cm-1 in neon are assigned to C−O stretching vibrations of the ScCO molecule, 1923.5 cm-1 in argon and 1962.4 cm-1 in neon to the ScCO+ cation, and 1732.0 cm-1 in neon to the ScCO- anion, respectively. Higher carbonyls Sc(CO)2,3,4 and Sc(CO)+2,3 are also produced on annealing. Similar argon matrix experiments with Y give YCO and YCO+.
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