PHOTODESTRUCTION SPECTROSCOPY OF CARBON-DISULFIDE CLUSTER ANIONS (CS2)(N)(-) N=1-4 - EVIDENCE FOR THE DIMER CORE STRUCTURE AND COMPETITIVE REACTIONS OF THE DIMER ANION
T. Maeyama et al., PHOTODESTRUCTION SPECTROSCOPY OF CARBON-DISULFIDE CLUSTER ANIONS (CS2)(N)(-) N=1-4 - EVIDENCE FOR THE DIMER CORE STRUCTURE AND COMPETITIVE REACTIONS OF THE DIMER ANION, The Journal of chemical physics, 108(4), 1998, pp. 1368-1376
Photodestruction spectra of carbon disulfide cluster anions, (CS2)(n)(
-),, n=1-4, have been measured with a time-of-flight mass spectrometer
coupled with an optical parametric oscillator. The spectra of all the
cluster anions of n greater than or equal to 2 were found to exhibit
a similar absorption band peaking at 1.6-1.8 eV, suggesting that a C2S
4-, core is involved in the cluster anions. Photon energy, dependence
of competition between electron detachment and dissociation:ion of the
dimer anion was also observed. It was found that there is a reaction
channel of the dimer anion producing C2S2-, and S-2, as well as the or
dinary dissociation into CS2- and CS2. The most stable form of the dim
er anion was investigated by nb initio calculations at the unrestricte
d Hartree-Fock/6-31+G level, showing that the stable form involves co
valent C-C and S-S bonds. Reaction:n mechanisms are discussed on the b
asis of electronic symmetries of the parent and the fragments. (C) 199
5 American Institute sf Physics, [S0021-9606(98)01804-2].