Diorganoantimony halides

Several diorganoantimony mixed halides have been prepared by the reaction of diorganoantimony halides with elemental halogens as shown in equations 236 and 237 -228 ... 

Only a few dialkylantimony(V) halides are known62"64. Most of the diarylantimony(V) chlorides have been prepared by the reactions of antimony(III) chlorides with diazonium salts65"69 or by some other methods70"74 such as the halogenation of diorganoantimony-(III) halides, R2SbX. 

Diorganoantimony(V) halides form monomeric covalent adducts, R2SbX3 L, with various oxygen donor ligands (e.g. DMSO, HMPA, TPPO, PyO)91,97). An octahedral geometry has been proposed on the basis of infrared and H NMR spectral data. Out of the three possible geometrical isomers, the existence of the following isomer has been proposed ... 

Protonolysis of trioganoantimony and -bismuth compounds by mineral acids gives diorganoantimony and -bismuth(lll) halides under controlled conditions (equations 46 and 47 ). 

Reaction of diorganoantimony and -bismuth anionic species with halides... 

Reaction of diorganoantimony and -bismuth halides with Li, Na, Mg or Zn gives tetraorganoantimony-antimony or -bismuth-bismuth compounds as shown in equations 120 , 12L and 122 . These can be considered as reactions... 

Hexaorganoantimony and -bismuth anions have been described in Section III.A. Monoorganoantimony tetrahalides and diorganoantimony trihalides react readily with halide anions to form the corresponding hexacoordinate anions. Several examples are shown in equations 288 289 ", 290 and 29P" ... 

Triorganoantimony and -bismuth compounds, distibines, diorganoantimony and -bismuth halides are reduced to afford diorganoantimony alkali metal compounds as shown in equations 107 108 27 109 , 110 lll s 113 and 114. The... 

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