J. Szczepanski et al., ISOTOPIC INFRARED-ABSORPTION STUDY OF C-5(-), C-7(-), AND C-9(-) CARBON CLUSTER ANIONS IN AR MATRICES, The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory, 102(43), 1998, pp. 8300-8304
The carbon cluster anions C-5(-), C-7(-), and C-9(-) have been formed
via a dual laser beam technique, trapped in Ar matrixes, and studied b
y infrared spectroscopy. C-13-Isotopic substitution combined with dens
ity functional (B3LYP/6-31G) calculations of vibrational frequencies
and intensities has led to the assignment of asymmetric stretching mod
es in the three anionic clusters. From the excellent fit of the calcul
ated and experimental singly C-13-substituted cluster bands, a linear
geometry for all three clusters has been determined.