Arsenic halides anions

In the thioarsenic halide anions [As2SC15] and [As Cl ]2- the As atoms are bridged by S and Cl.61 In the former the chlorine bridge forms an axial bond with each arsenic atom, which has trigonal pyramidal geometry (24). 

Reaction of organoantimony anionic species with phosphorus and arsenic halides... 

Silyl and stannyl anions react with arsenic halides to give the corresponding As—Si and As—Sn compounds, respectively (equations 225 and 226 ). 

Reaction of arsenic halides with metal anions... 

Figure 7.3 plots the ratio of crystal radius versus charge for selected ions. Oxyanions—sulfate, selenate, phosphate, arsenate, borate, molybdate, carbonate, and silicate—are represented by their central cations S6+, Se6+, P5+, As5+, B3+, Mo4+, C4+, and Si4+. The ions fall into three behavioral groups. Ions of high ionic potential, the alkali and alkaline earth cations and the halide anions, large univalent and divalent ions, are highly water soluble, easily weatherable, and leach readily from soils to the sea over geologic time. 

The Structural principles of the elements can also be found in a number of ternary Zintl phases. For example, KSnSb contains (SnSb ) layers as in a-arsenic. In other ternary ZiNTL phases the anionic part of the structures resembles halo or oxo anions or molecular halides. For example, in Ba4SiAs4 there are tetrahedral SiAs particles that are isostructural to SiBr4 molecules. In Ba3AlSb3 dimeric groups Al2Sbg2 are present, with a structure as in A Clg molecules (Fig. 13.4). Ca3AlAs3 contains poly-... 

Although solvents may be classified as donor solvents (Lewis bases) and acceptor solvents (Lewis acids), most of the more widely used nonaqueous solvents are donor solvents. Some acceptor solvents, such as S02, BrF3, AsC13, or the liquid hydrogen halides, have proved to be useful in coordination chemistry.13"16 Ionization is promoted in a donor solvent by solvation of cations and in an acceptor solvent by solvation of anions. For example, arsenic(m) iodide is ionized in a donor solvent D according to the reaction... 

If a mixture of halides, or of phosphate, arsenate, and arsenite, is suspected, use the methods of separation given in Section V.18, 4. The confirmatory tests for the individual anions are collected in Section VI.6. 

If a mixture of the halides, or of phosphate, arsenate or arsenite, is suspected, use Table V.30 or V.31 given in Section V.18. The confirmatory tests for individual anions are collected in Section V.19. The reactions with silver nitrate solution are intended to act as a guide to the presence of groups of anions, and the table must be interpreted in conjunction with the observations made in the preliminary tests. Arsenite, arsenate, and chromate will also be found in the analysis for cations (Sections V.12 and V.14). 

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