In this work we analyze clusters between the methoxy radical (CH3O, an
open-shell molecule) and the nonpolar solvents Ar, N-2, CH4, and CF4.
CH3O is formed through the photolysis of CH(3)0H vapor in a supersoni
c expansion of CH3OH and a solvent gas (Ar, N-2, CH4, CF4) Seeded in a
carrier gas of He. The radical and solvent molecules are cooled to si
milar to 15-20K and form clusters. These clusters are probed using las
er induced fluorescence (LIF) of the CH3O radical. An extensive set of
calculations, including ab initio and atom-atom potential calculation
s and:rotational contour simulations are performed for each cluster in
order to elucidate the cluster structure and the nature and relative
importance of the limiting types of interactions that are responsible
for cluster binding. A final minimum energy structure is presented for
each cluster, together with the analysis of the limiting type of inte
ractions that generate the van der Waals binding of the cluster. (C) 1
997 American Institute of Physics.