Iodine basic behavior

From these two main groups of the Periodic System of Elements, only the elements bromine, iodine, rubidium and cesium are produced by nuclear fission to an extent worth mentioning. Iodine and cesium are of particular interest during plant normal operation as well as in accident situations, because of their comparatively high fission yields, their enhanced mobility in the fuel at higher temperatures and the radiotoxicity of some of their isotopes. Both elements are often summarized under the term volatile fission products their similar properties justify their treatment in the same context, despite pronounced differences in their basic chemical behavior. 

In charge-transfer interaction with iodine (145) dimethyl sulfide is more basic than dimethyl disulfide in accordance with behavior towards protonic acids unfortunately methyl mercaptan reacts with this acid. Iodine as an acid behaves clearly in a different way from protonic acids or BF in that it complexes more strongly with dimethyl sulfide than with the corresponding ether. 

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