Halogens, elemental reactions with

Halogenation of the B12Hi22- ion with N-halosuccinamide leads to mono- and di-halosubstituted dodecaborates, while reaction with elemental halogens finally led... 

The yields of the reactions with elemental halogens are almost quantitative, and with the copper(II) halides 82%. 

Conjugated, cross-conjugated, and homoconjugated fluoroalkenes react with halogens to yield predominantly 1,4-adducts Results from the reactions of a series of conjugated fluoroalkenes with elemental halogens are summarized in Table 4 In nearly all cases, the fraMs-l,4-addition products are formed exclusively [Il ... 

Thallium burns in fluorine with incandescence. Reactions with other halogens form halides. Thallium combines with several elements forming binary compounds. 

Monohalogenated products are obtained by treatment of this heterocycle (20) with elemental halogens (bromine, chlorine, or iodine) in concentrated sulfuric acid containing silver sulfate. This acidic reaction medium aids electrophilic attack by the positive halogen species on a protonated thienopyridine. Subsequently, nonacidic conditions have been identified for the monobromination reaction <74JHC205>. Monobromination of the isomers (21) and (23) has also been reported <70AK(32)249>. 

Covalent hahdes can be prepared by various synthetic routes. The simplest are direct reactions of elemental halogens (equation 9), or hydrogen halides with elements (equation 10) or oxides (equation 11). In other processes, the oxides are reacted with a halogen halide in the presence of carbon to combine with the oxygen (equation 12) or other reactive carbon-halides (equation 13). Exchange of halogens can also take place (equations 14 16). Anhydrous halides can also be obtained by dehydration of metal halide hydrates, using reactants such as thionyl halide, which react with the hydrated water (equation 17). 

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

Preparation and Structure.—A study of the reaction of phosphorinans (75) with elemental halogens has revealed the formation of three types of product in solution. For the phosphonium salt species (76), the counterion is sometimes a tri-... 

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