Hi so I just had my AS mock, and one of the big 7 markers was with organic mechanisms. From what I remember, it asked for the mechanism of the reaction between ICl and CH4, and it said that this reaction is similar to that of Cl2 and CH4 (free radical subtitution - which is what we have learnt and is on the specification). the first question asked what was needed to get the reaction started --> UV light. But here is where I am confused, homolytic fission is when the bond between two atoms of the same electronegativity is broken, and so electrons are shared equally and the Cl2 would turn into 2 Cl radicals. However, during the exam I knew that Fluorine is much more electronegative than Iodine, and so I thought this would be heterolytic fission and the Fluorine would take both of the electrons form the bond. Hence it asked for the mechanism, which turned out to be completely different than that of the free radical substitution reaction of Cl2 and CH4.
So please tell me, is this an example of free radical substitution, the same as Chlorine, or is it something else