The infrared chcmilumincscenco arising from the hydrogen abstraction reactions of ELuorinc atoms with 1120, H2S. Ii202 snd CH4 was investignted et low pressure in n ilow apparatus. Emission was found only from the HF product. The rclotive RF vibrational populations were determined under conditions which minimized vibrational rclnxntion. Infrared chemiluminescence from diatomic moIecules with fundamental frequencies above 2000 cm-l has proven to be a powerful tool for measuring vibrational-rotational energy distributions produced by chemical reactions [l-4]. For most A + BCD 4 AB + CD reactions only one product [5] l * can be observed at the low pressure necessary to obtain initial energy distributions because the spectral range of high scnsitivity infrared detectors is limited. We wish to report new infrared chemiluminescence measurements from reactions A + BCD -AB + CD type reactions, having both products with fundamental vibrations that are within the most sensitive * This work ma supported by the Notional Science Foundation under Grant G.P.-9245 to Knnsns Statc University. ** The reaction H+NOCLdNO+HCI. hss been studied by the infrared chemituminescence technique. The energy distributicn for both products vms studied by observing the overtone transitions for NO. no infrared emission from 033 in the C-H stretch region.