Sulfur monobromide

Combination reactions occur with several nonmetals. With sulfur, it forms sulfur monobromide, S2Br2. With the addition of selenium, products are selenium monobromide, Se2Br2, and selenium tetrabromide, SeBr4. It yields unstable tellurium monobromide, Te2Br2, and a stable tetrabromide, TeBr4,with tellurium. 

SulfUr monobromide dissociates into its elements when heated to 100°C. Water reacts with the substance to form hydrogen bromide, sulfur dioxide, and demental sulfur. It dissolves in many organic solvents such as carbon tetrachloride and benzene. 

Sulfur monobromide pentafluoridc (16) and the acetylene 17 react to yield the adduct 18 which, after elimination of hydrogen bromide, gives bis(pcntafluoro-/, -sulfanyl)]acetylenc (19) in rea-.sonable yield. 

Disulfur dibromide. Older names sulfur monobromide and sulfurous bromide. ... 

Organosulfur Halides. When sulfur is directly linked only to an organic radical and to a halogen atom, the radical name is attached to the word sulfur and the name(s) and number of the halide(s) are stated as a separate word. Alternatively, the name can be formed from R—SOH, a sulfenic acid whose radical prefix is sulfenyl-. For example, CH3CH2—S — Br would be named either ethylsulfur monobromide or ethanesulfenyl bromide. When another principal group is present, a composite prefix is formed from the number and substitutive name(s) of the halogen atoms in front of the syllable thio. For example, BrS—COOH is (bromothio)formic acid. 

The aHphatic iodine derivatives are usually prepared by reaction of an alcohol with hydroiodic acid or phosphoms trHodide by reaction of iodine, an alcohol, and red phosphoms addition of iodine monochloride, monobromide, or iodine to an olefin replacement reaction by heating the chlorine or bromine compound with an alkaH iodide ia a suitable solvent and the reaction of triphenyl phosphite with methyl iodide and an alcohol. The aromatic iodine derivatives are prepared by reacting iodine and the aromatic system with oxidising agents such as nitric acid, filming sulfuric acid, or mercuric oxide. 

Unfortunately, all attempts to utilize 59 as a precursor for 57 were seriously hampered by its sparing solubility in most organic solvents. A separate effort was therefore made to prepare 60, which was expected to be a more soluble compound. As can be seen in Scheme 15, 66 was allowed to react with an excess of MeLi to give 69, which was cyclized to 70 by treatment with sulfuric acid. Again, bromination of 70 provided monobromide 71, which was dehydrobrominated with KO-t-Bu to form our second target molecule 60. The H NMR signal for the olefinic protons at 85.91, as compared with those of 62 at 8 6.60, also suggested that the... 

V. Braun reaction Cyanogen bromide. Phosphorus tribromide. Piperidine. Thionyl chloride. Bromination Aluminum bromide. Aluminum chloride. Boron tribromide. Bromine chloride. N-Bromocaprolactam. N-Bromosuccinimide. Bromotrichloromethane. Cupric bromide. Dibenzoyl peroxide. l,3-Dibromo-5,5-diraethylhydantoin. 1,2-Dibromotetrachloromethane. HBr-scavengers acetamide and potassium chlorate. Iodine. Iodine monobromide. Iron. Mercuric acetate. Phenyl trimethylammonium perbromide. Phosphorus trichloride. Pyridine. Pyridine perbromide. Pyridinium hydrobromide perbromide. Silver sulfate. Sodium acetate. Sodium hypobromite. Sulfur. Sulfur monochloride. Tetramethylaramonium tribromide. M-Tribromoacetophenone. Trichloromethane sulfonyl bromide. Trilluoroacetyl hypobromite. Triphenylphosphine dibromide. 

---