Accession Number:

ADA257828

Title:

Chemical Reactions in Clusters

Descriptive Note:

Technical rept.

Corporate Author:

COLORADO STATE UNIV FORT COLLINS DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1992-11-04

Pagination or Media Count:

56.0

Abstract:

Four different classes of cluster chemical reactions are reviewed and specific examples from our laboratory are given for each class. Solvent induced electron transfer reactions are illustrated by our studies of 4- dimethylaminobenzonitrileacetonitrile clusters. The electron transfer reaction depends on solvent polarity and on cluster structure. The reaction is induced by only one properly oriented CH 3 CN solvent molecule. Proton transfer reactions in neutral clusters are exemplified by the 1-naphtholammonia cluster system. Proton transfer occurs in the first excited singlet state of the 1-naphthol NH 33 cluster of the proper geometry. Two time decays are measured for this event one dealing with proton transfer and the other with solvent reorganization or relaxation following the transfer event. Isotope, energy, cluster size dependence, and model calculations demonstrate a proton tunneling mechanism is appropriate for this reaction. Cluster ion chemistry for toluene, toluene-d3, benzyl alcohol, benzyl-alpha, alpha-d2 alcohol, benzyl-alpha, a-Me2 alcoholammonia and water clusters is also discussed. These ionic reactions are characterized by benzyl-like radical formation, solvation of protons, and extensive cluster fragmentation following both ion formation and proton transfer. Finally, a preliminary study of radical reactions in clusters is presented for the benzyl radical clustered with ethylene, propylene, and actylene.

Subject Categories:

  • Organic Chemistry
  • Physical Chemistry
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE