Interhalogen compounds chlorine trifluoride

Fluorine also reacts with other halogens, forming interhalogen compounds. While with bromine and iodine it reacts vigorously at ordinary temperatures, with chlorine the reaction occurs at 200°C. Such interhalogen products with these halogens include iodine heptafluoride, bromine trifluoride, bromine pentafluoride, and chlorine trifluoride. Metalloid elements, such as arsenic, silicon, selenium, and boron also inflame in a stream of fluorine, forming fluorides. 

Boron trifluoride forms addition compounds that incorporate an sp hybridized boron into a tetravalent structure. Salts of BF4 are readily formed with BF3 and a suitable fluoride donor. Halogen fluorides such as chlorine trifluoride react with BF3 to generate interhalogen cations such as [C1F2]+[BF4]. Some further examples are shown in equations (43) and (44). In an organic application, the Schiemann reaction provides an entry into fluorinated aromatics by thermal decomposition of a diazonimn tetrafluoroborate (equation 45). 

SAFETY PROFILE Inhalation of the fumes can produce a febrile reaction and leucocytosis in humans. Questionable carcinogen with experimental tumorigenic data. Violent reaction or ignition in contact with interhalogens (e.g., bromine pentafluoride, chlorine trifluoride). Incandescent reaction with phosphorus pentachloride. See also MAGNESIUM COMPOUNDS. 

MOLYBDENUM TRIOXIDE or MOLYBDENUM(VI) OXIDE or MOLYBDIC ANHYDRIDE or MOLYBDIC TRIOXIDE (1313-27-5) M0O3 Violent reaction with strong oxidizers interhalogens, chlorine trifluoride, bromine pentafluoride interhalogens molten magnesium hot lithium, potassium, sodium. Incompatible with common metals, alkali metals, lithium, magnesium, potassium, sodium. Forms a series of polymeric compounds with acids and bases. Thermal decomposition releases toxic metallic fumes. On small fires, use dry chemical powder (such as Purple-K-Powder), Halon , or COj extinguishers. 

The interhalogen compounds are highly reactive substances, especially those containing fluorine. Chlorine trifluoride (CIFj) of b.p. 11°C is in many respects more reactive than fluorine and flames instantaneously not only with many organic substances but even with aluminum oxide and magnesium oxide. Similar in behavior is bromine trifluoride (BrF ) of m.p. 8.8 C and b.p. IBSX. Other interhalogen compounds, all very reactive, are CIF, BrF, BrF, IFj, and IF,. More recently discovered was the compound chlorine pentafluoride (ClF ) of m.p, approximately — 103"C and a b.p. of — 18.1 C. 

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