Bismuthonium halides

Bismuthonium ylides, 4 34 Bismuth(III) oxide, 4 23-24 Bismuth oxide(l l), 4 23 Bismuth oxide(l 2), 4 23 Bismuth oxide(2 4), 4 23 Bismuth oxide(3 5), 4 23 Bismuth oxide(4 9), 4 23 Bismuth oxide halides, 4 23 Bismuth oxides, 4 23-24 Bismuth oxybromide, 4 23 Bismuth oxychloride, 4 23 physical properties of, 4 20t pigment used in makeups, 7 836t Bismuth oxyfluoride, 4 23 Bismuth oxyiodide, 4 23 Bismuth pentafluoride, 4 22 physical properties of, 4 20t Bismuth phosphate, 4 25... 

Metathesis of tetraarylbismuthonium halides with metal salts has often been used to exchange the halide anion for other anionic species (Section 3.3.1). For example, the reaction between tetrakis(2-methoxyphenyl)bismuthonium chloride and sodium or silver salts of formate, tosylate, bromide, iodide, tetrafluoroborate or perchlorate yields the corresponding bismuthonium compounds of the type [Ar4Bi ]Y (Ar = 2-methoxyphenyl Y = OCOH, OTs, Br, I, BFj, CIO4) [97JCS(P1)1609]. 

Arsonium and stibonium salts have properties consistent with their ionic constitution. The hydroxides are strong alkalis like quaternary ammonium hydroxides. The tetrahedral structures of their cations have been confirmed in some instances by X-ray analysis. Of the few bismuthonium salts known, the tetraphenylborate Ph4Bi BPh4 (from Ph5Bi+Ph3B) is among the more stable. The halides readily lose halobenzene, e.g. 

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