Bis chalcogenides

The oxidative properties of ditelluronium and diselenonium dications are similar to S-S dications. For instance, interaction of thiophenol or 1,2-diphenylhydrazine with either the diselenonium dication 113 or the ditelluronium dication 114 leads to almost quantitative formation of diphenyldisulfide or azobenzene and reduced bis-chalcogenides.113,114,124 Reduction of 113 and 114 with NaBH4 gives the same products as above but proceeds quantitatively via direct electron transfer (Scheme 47).128... 

The binary compounds of the Group 13 metals with the elements of Group 15 (N, P, As, Sb, Bi) are stmcturally less diverse than the chalcogenides just considered but they have achieved considerable technological application as III-V semiconductors isoelectronic with Si and Ge (cf. BN isoelectronic with C, p. 207). Their stmctures are summarized in Table 7.10 all adopt the cubic ZnS stmcture except the nitrides of Al, Ga and In which are probably more ionic (less covalent or metallic) than the others. Thallium does not form simple compounds... 

Chalcogenide halides of antimony and bismuth have been known since the end of the last century, mainly through contributions by Ouvrard and Schneider. With the exception of BiSeCl, only thiohalides were reported. The early work is summarized in (147) (Sb, before 1948) and (148) (Bi, before 1927), and it will only occasionally be dealt with. Beyond that, these materials had not found much interest. 

Most commonly available Group 15 (Sb, Bi)-16 binary chalcogenides ... 

In the particular case of bis(dichloroorganostannyl)methane structures, obtained from the gem-distannyl compounds shown in reaction 13, treatment with sodium chalcogenides... 

The class of chalconium compounds [E(HgMe)3]X (E = O or S) has been extended by the preparation of the new selenonium complex [Se(HgMe)3]N03 from the reaction of H2Se with MeHgN03.176 The bis(methylmercuric)chalcogenides E(HgMe)2 (E = Se or Te) were also obtained by the reaction of H2E with methylmercuric bromide. 

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