Knowledge Bank

When a Ne:HCl sample is codeposited at approximately 5 K with a beam of neon atoms that has been excited in a microwave discharge, the vibrational fundamental absorption of $HCl+$ is detected in the infrared spectrum of the sample deposit. Less prominent absorptions of $H2Cl+$ are also detected, as is a relatively broad absorption of $(HCl)n-$ Shifts from the positions of the gas-phase HCl-stretching absorptions are approximately 1%. When $O2$ is added to the sample mixture, infrared absorptions assigned to the OO- and $HCl-+$ stretching vibrations of the $O2\cdots HCl+$ complex are identified.