NONCOVALENT BINARY INTERACTIONS BETWEEN SOME ORGANIC-ACIDS AND BASES

Very-low-energy electron attachment to homogeneous and mixed pyridine, phenol and cyclohexanol dimers is studied by means of collisions with laser-excited Rydberg atoms and several new dipole-bound anions are o bserved. The corresponding structures and binding energies of their ne utral parents are determined by model calculations of the intermolecul ar interactions between these polar closed-shell molecules. In the cas e of the phenol-pyridine dimer, a valence negative ion is observed. Th e geometry of its neutral parent is obtained from both ab initio and m odel calculations.