Antimony chalcogenide halides

Although arsenic is a nonmetal, the chalcogenide halides of this element bear a strong relationship to the antimony and bismuth systems, and will therefore be treated separately. 

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. 

In the early 1950s, in a systematic study, Donges (106-108) discovered most of the chalcogenide halides of antimony and bismuth that are known today, and then solved their structures. 

The chalcogenide halides of antimony and bismuth are stable in air, and do not dissolve in H O or diluted acids. Their colors, mainly referring to single-crystal needles, are given in Tables XXIII and XXIV. 

Some Physical Properties of Antimony and Bismuth Chalcogenide Halides... 

CHALCOGENIDE HALIDES OF COPPER, GOLD, MERCURY, ANTIMONY, AND BISMUTH... 

Li the case of Sb2S3 and NaCl, the energy difference is AU = - 8 kcal and, therefore, the conditions for the synthesis of NaSbS2 are unfavorable. This was confirmed by e q >eriments which demonstrated that the direction of the reaction was predominantly from the right to the left so that sodium thioantlmonide was not obtained. We calculated the values of AU for all cases of interaction between alkali halides and antimony chalcogenides. Figure 1 shows the dependences of AU on the radius of the alkali metal ion r. 

Fig. 2.6. Isomer shifts for systems with pyramidal geometry (a) antimony(lll) halides and chalcogenides, and (b) tin(ll) complexes, Et4N(SnX2Y) (X, Y = F, Cl, Br, 1). The isomer shifts are relative to InSb for the antimony compounds and relative to SnOj for the tin complexes.

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