Diiodine selenium bases

Like sulfur, selenium based electron donors are heavily studied due to their potential as antithyroid agents. Of the 28 complexes reported, the majority (20) are diiodine based, and most of these (16) are simple adducts. One diiodine complex is bridged, one contains only extended adducts, one contains only bridged adducts, and one contains both bridged and extended adducts. All of the interhalogen complexes are simple adducts except one with iodine monobromine, which forms an extended adduct. 

Figure 5.6 Famiiy-dependent piot of diiodine basicity against Ar(l-I) (A), the iengthening of the i—i bond. Nitrogen bases (squares), sulfur bases (diamonds), selenium bases (stars) and PhsAs. For the sake of clarity, a number of points have been omitted in each family.

Table 5.20 Equilibrium constants Kc (1 mol bases. 0 and diiodine basicity scales pKgi., and AC° (kj mol 0 for the complexes of diiodine with selenium ...

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