Crossed Beam Studies of Some Chemiluminescent Reactions Producing IF
Abstract
We have studied the following series of chemiluminescent reactions: flourine + hydrogen iodide, CH3I, CF3I, CH2I2, CHI3, and CI4. All these reactions can produce IF in the B state. With respect to the previous studies which were made under flow conditions, we have used a crossed-beam experiment. In these conditions, the chemiluminescence signal is very small for the reactions of the iodomethanes (if we except the particular case of CI4 which gives a large signal due to iodine impurity), but this signal is considerably larger for HI. In this only case, the spectrum of the chemiluminescence was recorded, which shows that the emitter is well IF in its B state. This mechanism involves in a first step the formation of HIF radical and a free F atom. The fluorine atom in the HIF radical migrates to form HF and leaves the I and F atoms free to recombine in any electronic state. Fluorine migration seems forbidden by steric arguments in the case of the CH3IF and similar radicals explaining the very low chemiluminescence branching ratio in these reactions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 15, 1991
- Accession Number
- ADA241261
Entities
People
- D. Khalil
- G. Gouedard
- J. Vigue
- N. Billy
Organizations
- École Normale Supérieure