Reactions between rubidium atoms and C6F6, C2Cl4, C2HCl3, CH2=CCl2 or trans-C2H2Cl2 in crossed molecular beams.

Molecular and fragment negative ions are produced from the collisions between rubidium atoms and several kinds of halogenated unsaturated organic molecules in crossed supersonic beams. Their apparent electron affinities and the bond dissociation energies are measured.