Bismuth III Iodide

Bismuth(III) iodide has been prepared in the absence of solvents by the reaction of iodine with elemental bismuth1,2 or with bismuth (III) sulfide.3 Alternative methods involve precipitation of bismuth(III) iodide from aqueous solutions of bismuth salts by adding alkali-metal iodides,4 and the addition of bismuth (III) oxide to a solution of iodine and tin(II) chloride in saturated hydrogen chloride.5 In either case the initial product is purified by sublimation, usually in an atmosphere of carbon dioxide. The product obtained by precipitation requires several resublimations for complete purification.6 

In the procedure described below, bismuth (III) iodide of high purity is formed by the direct union of bismuth and 

The open end of the reaction tube is attached to an oil pump through a dust trap, and dry nitrogen is admitted at a rate such that the pressure is maintained at or below 25 mm. The bismuth(III) iodide is sublimed into the receiver end of the tube by heating with the spread burner flame and with an auxiliary Tirrill burner adjusted to maximum heat. Satisfactory progress of the sublimation is indicated by the persistence of yellowish-brown bis-muth(III) iodide vapors and by the absence of the violet color of iodine vapor. When the sublimation is complete, the tube is allowed to cool to room temperature in nitrogen at atmospheric pressure. The product is scraped from the receiver section of the tube and stored out of contact with the atmosphere. The yield is 72% based on bismuth. Anal. Calcd. for Bil3 Bi, 35.44. Found Bi, 35.42. The same result is found upon analysis of a resublimed sample of this product. 

Bismuth (III) iodide prepared as described above consists of very small, black, hexagonal crystals having specific gravity 5.64. At atmospheric pressure this compound sublimes at 439° and decomposes at 500°. It is soluble in liquid ammonia and in absolute ethanol. It is insoluble in cold water but decomposes slowly in hot water. Bis-muth(III) iodide is slowly converted to bismuth(III) oxy-iodide upon extended exposure to the atmosphere. 

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The key intermediate for the antibacterial agent levofloxcin, (,S>( )-7,8-difluoro-2,3-dihydro-3-methyl-4H-l,4-benzoxazin, was prepared by the asymmetric hydrogenation of (442) by the catalyst system made in situ from [Ir(cod)Cl]2, biphosphine and bismuth(III) iodide.703 The product was isolated in 96% yield, with an enantiomeric purity of 90% for the biphosphine (2S,45)-BPPM,(2S,45)-N-( -butoxy-carbonyl)-4-(diphcnylphosphino)-2-[(diphcnylphosphino)mcthyl]-pyrrolidine. 

Scheme 8 Bismuth(III) iodide-catalyzed chemoselective deprotection of an acetal...

Bismuth Triiodide. Bismuth(III) iodide is a greenish black crystalline powder. The iodines are in a hexagonal dose-packed array with each bismuth having six nearest-neighbor iodines at 0.32 nm (21). This suggests that the lone pair on bismuth is stereochemically inactive and that the compound is largely ionic in character. 

Potassium iodide Black precipitate of bismuth (III) iodide... 

Bis (ethylenediamine)copper (II) diiodocuprate(I), 5 16, 17 Bis (ethylenediam ine) copper (II) iodide, formation of, from bis-(ethy lenediamine) copper (II) diiodocuprate(I), 5 18 Bis(ethylenediamine)nickel(II) chloride, 6 198 Bismuth(III) iodide, 4 114 Bismuth magnesium nitrate, 2Bi-(N0,)3-3Mg(N0,), 24H,0, separation of europium from samarium and gadolinium by, 2 57... 

Calcium dihydrogen orthophosphate 1-hydrate, synthesis 5 Calcium hydrogen orthophosphate, synthesis 6 Arsenic(III) fluoride, synthesis 50 Bismuth (III) iodide, synthesis 38 Vanadium(II) chloride, synthesis... 

Bil3 Bismuth(III) iodide, 4 114 2Bi(N03)3-3Mg(N03)2-24H20 Bismuth magnesium nitrate, 2 57 BrF Bromine (I) fluoride, 3 185 BrF3 Bromine(III) fluoride, 3 184 BrF5 Bromine (V) fluoride, 3 185 BrH Hydrobromic acid, 1 151, 152, 155... 

Diorganoantimony and -bismuth(III) iodides have been prepared by the reaction of the corresponding chlorides or bromides with sodium or potassium iodide (equation 44) °. 

CAS 7787-64-6 EINECS/ELINCS 232-127-4 Synonyms Bismuth (III) iodide Bismuth triiodide... 

Bismuth (III) iodide. See Bismuth iodide Bismuthiol I. See 2,5-Dimercapto-1,3,4-thiadiazole Bismuth nitrate... 

Cobalt (II) iodide is subject to auto complex formation in TMP and it is ionized in TMP, DMF, DMA and DMSO. Nickel iodide is completely ionized in TMP and DMS02. Tin(IV) iodide, bismuth(III) iodide, antimony(III) iodide, lead(II) iodide and cadmium (II) iodide are considerably ionized in DMF and completely ionized in DMSO. ... 

Bismuth(iii) iodide/acetic acid (Oragendorff Alkaloids... 

Allylindium(III) and -bismuth(III) dihalides, generated by transmetallation of 5-benzyloxy-4-methylpent-2-enyl(tributyl)stannane, react with aldehydes with useful levels of 1,5-stereocontrol, a 93 7 ratio of 1,5-epimers in favor of the l,5-anti-(E)-stereoisomers typically being obtained using bismuth(III) iodide. These bismuth(III) and indium(III) halide-promoted reactions are of interest since they... 

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