Carbonyl halides fluorides

It should be noted that there have been two reports in the literature of RADS apparently being induced by exposures to bromotrifluoromethane (BTM) and bromochlorodifluoromethane (BCDFM), fluorocarbons used in fire extinguishers. I86,87 Both are irritant chemicals, and the effects noted seemingly contradict the observation made above that RADS induced by irritants is always to mixtures of lipophiles and hydrophiles. Both BTM and BCDFM, however, thermally decompose and hydrolyze to haloacids (HC1, HBr, and HF) and their corresponding carbonyl halides (carbonyl chloride, bromide, and fluoride), chemicals that are corrosive to human tissue. In the two studies reported, no analysis of the air inhaled by the injured individuals was carried out. It is strongly suspected that their inju-... 

Phosgene can be used as the starting material for the preparation of other potentially useful carbonyl halides and carbonyl pseudohalides. Reaction of phosgene with fluorspar, for example, gives COCIF (see Section 9.1.1 and Chapter 16). With aluminium(III) bromide, COBrj is formed (Section 9.1.2.6). Reaction of COClj with HF gives COFj (see Section 9.10.4 and Chapter 13), reaction with silver cyanide gives carbonyl dicyanide, CO(CN)j (Section 9.1.7), whereas reaction with a mixture of sodium fluoride and HCN gives the mixed carbonyl halide pseudohalide, COFCN (Section 9.1.7 and Chapter 13). The chemistry of these... 

A general patented method [905] for the preparation of tetrahalomethanes has been claimed in which a carbonyl halide of general formula, COXY (X = F, Cl or Br Y = Cl or Br) is combined with a carbonyl fluoride halide, COXF (X = F, Cl or Br) in the presence of an activated carbon cataiyst (containing the halide of a transition metal) at a temperature of 250-1400 C. Thus, heating COBrF in an autociave is claimed to induce the following reaction [902,905] ... 

EXPLOSION and FIRE CONCERNS noncombustible liquid nonflammable gas NFPA rating (not rated) contact with chemically-active metals (such as potassium (K), sodium (Na), calcium (Ca), powdered aluminum (Al), zinc (Zn) and magnesium (Mg)) will cause fires and explosions contact with flames and/or hot surfaces will emit hydrogen bromide, hydrogen fluoride, free bromine, and small amounts of carbonyl halides product is relatively toxic to humans at levels below fire extinguishing concentration product will not extinguish fires resulting from contact with chemically-active metals use water spray to cool cylinders involved in fires use media suitable for flammable materials in area. 

Tri-n-hutylamine Reactions of carbonyl halides with cyclic ethers o>-Chloralkyl fluoroformates from carbonyl chloride fluoride... 

Hexacarbonylmolybdenum is an air stable solid which is slowly oxidized in solution when exposed to air. It does not react with hydrochloric acid it is slowly oxidized by concentrated sulfuric acid and, in the presence of concentrated nitric acid, it rapidly undergoes decomposition. Fluorine oxidizes hexacarbonylmolybdenum to fluorides, while chlorine, bromine, and iodine form carbonyl halides, [Mo(CO)4X2], at low temperatures. 

The carbonylation of aryl halides under mild conditions in the presence of CsF afford.s the acid fluoride 490 in good yields. Unlike acyl chlorides, acyl fluorides are inert toward Pd(0) catalyst[345]. Benzenesulfonyl chloride (491) undergoes desulfonylation-carbonylation to give the benzoate 492 in the presence of titanium tetralkoxide at 160 °C[346]. 

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