Diiodine sulfides

D.6 Write the formula of (a) dinitrogen tetroxide (b) hydrogen sulfide (c) dichlorine heptoxide (d) nitrogen triiodide (e) sulfur dioxide (f) hydrogen fluoride (g) diiodine hexachloride. 

The interaction of dihalogens, particularly diiodine, with sulfur and selenium electron donors has been an area of increasing interest over the past decade because of potential biological, pharmaceutical, and electronic materials applications [35,179]. Devillanova and coworkers have recently reviewed the solution behavior of a large number of chalcogenides and I2, particularly thiones, selones, sulfides, and selenides [180]. Correlations between computational methods, thermodynamic parameters, and spectroscopic data (UV/Vis, 13C NMR, Raman, UPS) were discussed. 

Figure 5.5 X-ray structures of the diiodine complexes (CSD code in parentheses) of (a) methyl selenide (RIZMES), (b) N-methylthlazolldlne-2(3H)-selenone (planar) (YEYFEN), (c) N,N dlmethyllmldazolldlne-2-selenone (perpendicular) (REBNER) and (d) triphenylphosphine sulfide (NOEKOI). Distances are In Angstroms and angles In degrees.

Table 5,18 Equilibrium constants Kc (I mol 0 and diiodine basicity scales pKbi2 3A7c/ AG° (kj mol 0 for the complexes of diiodine with thiols, sulfides and disulfides. 

---