Until a decade ago, the only anion observed to play a prominent role in astrophysics was H–
. The bound–free transitions in H–dominate the visible opacity in stars with photospheric …

Molecular absorption and emission bands dominate the visible, infrared, and submillimeter
spectra of most objects with associated gas. These observations reveal a surprisingly rich …

We review the gas-phase chemistry in extraterrestrial space that is driven by reactions with
atomic and molecular ions. Ions are ubiquitous in space and are potentially responsible for …

▪ Abstract The problem of the binding of an excess electron to polar molecules and their
clusters has long fascinated researchers. Although excess electrons bound to such species …

The negative molecular ion C 8 H-has been detected in the Galactic molecular source TMC-
1. Four rotational transitions have been observed in the centimeter-wave band with the …

Feshbach resonances corresponding to metastable vibrational states of the dipole-bound
state (DBS) have been interrogated in real time for the first time. The state-specific …

The rate coefficients for the radiative attachment reactions between the radicals C n H (n= 2
{\mbox {--}} 8) and electrons have been calculated with the aid of quantum chemistry using a …

Conspectus Nonvalence bound states (NBS) are anionic states where the excess electron is
extremely loosely bound to the neutral core through long-range potentials. In contrast to the …

The critical dipole moment to bind an electron was empirically determined to be 2.5 debye,
even though smaller values were predicted theoretically. Herein, we report the first …

Nitromethane is a prototypical example for a molecule that can bind an extra electron in two
fundamentally different ways forming dipole-bound as well as valence anions. The …