Chemiluminescent reactions of fluorine atoms with organic iodides in the gas phase. Part 2. - Aliphatic and aromatic iodides

Visible chemiluminescence in the spectral range 200-900 nm has been measured for the reactions of F atoms with allyl iodide, mono-iodobenzene, hexa-iodobenzene and ortho-, meta- and para-iodotoluene studied at reduced pressures (ca. 0.6 mbar). Emission was observed from electronically excited IF*(B), HCF*(Ã), CH*(A) and C2*(d) and from vibrationally excited HF. Vibrational populations and rotational temperatures were obtained for the diatomic emitters. There is a strong interdependence of the relative intensity of HCF* emission and the intensities of CH* and C2*, suggesting that their production may involve competing reactions of the same species. The similarity in the types of emitters and their states of formation leads to the conclusion that the same reactions, probably involving very simple species, take place in all cases.