Electron attachment to complex molecules

The intersection of electron terms of the ground state of molecule and of the autodetachment state of negative ion for complex symmetric molecules such as $\mathrm{SF}_6$ is analyzed. Simple theoretical models are used to analyze the measured parameters which characterize the electron attachment to $\mathrm{SF}_6$ and other complex molecules. As a result, the parameters of ultraslow electron attachment to an $\mathrm{SF}_6$ molecule are found for different values of vibrational temperature of the molecule. The parameters are given of the temperature dependence of the rate constant of electron attachment to a number of complex molecules.