Other Mixed Halogen Compounds

The dichloro compound C12NF, which is explosive in the liquid or solid state, was prepared by the following reaction (280)  

An alternative reaction is that of C1F with C1N3 at 25°C or of C1F with NaN3 in a perfluorinated ether at 25°C. The boiling point lies in the range —10 to 0°C. It is more reactive than Cl2 and will react with either H20 or dilute NaOH. 

Bromodifluoroamine, BrNF2, may be prepared by the reaction of aqueous bromine with HNF2 in presence of HgO. It is a colorless liquid with a boiling point of — 36°C and decomposes rapidly on warming. 

NC13 and N3F on a Ni wire at 120°C has been reported to give the compound C1N=NF, but details of this work have not been published 179). 

A convenient preparative route to N2F2 is by passing difluoroamine, HNF2, which is readily prepared (see Section IX), over KF at room temperature, the latter acting as a dehydrofluorinating agent. At —80°C the 1 1 adduct can be isolated. 

---

Bromine vapor forms CgBr [12079-58-2] by direct addition to weU-oriented graphite. Other halogen and mixed halogen compounds have been prepared. 

Halides of carbon, other than those given in Table XXXIV, are known, and mixed halogen compounds also exist the boiling points of these compounds are given in Table XXXV. In this series the boiling point rises by equal increments when one halogen in a compound is replaced by another, and the calculated values given in the table assume equal increments. It appears that the mixed... 

Phosphoms forms weU-defined halogen compounds of the types PX, PX, POX, and PSX, all of which except the pentaiodide and the oxy- and sulfoiodides are known. In addition to the binary haUdes, a few of the many possible mixed haUdes, eg, PX2Y and PX2Y2, have been prepared. The commercially important phosphoms haUdes are phosphoms trichloride [7719-12-2] phosphoms oxychloride [10025-87-3] phosphoms pentachloride [10026-13-8] and phosphoms sulfochloride [3982-91-0]. A few other phosphoms haUdes, eg, PI, PR13) marketed as reagent... 

When the vapour of alkali metals is mixed at low pressures, of the order 10 3mm., with certain halogen compounds, a cold, highly diluted flame is produced. A deposit of alkali halide is formed on the wall of the tube in which the reaction takes place, and from the distribution of this deposit and the velocity of the gas stream the partial pressures of the reacting substances and the reaction velocity can be inferred. A number of investigations with various modifications of this method have been carried out by Polanyi and others, J and a careful analysis and interpretation of the results has yielded much interesting and valuable information about the speed of the chemical reactions involved. 

Many other materials have been placed on the restricted lists since this first list. These are listed in 40 CFR 268.32 through 40 CFR 268.39. Among the more critical in the context of laboratory wastes are (1) liquid hazardous wastes having a pH 2, (2) liquid hazardous wastes containing PCBs at concentrations 50 ppm, (3) liquid hazardous wastes that are primarily water and halogenated compounds at concentrations 1000 mg/L and 10,000 mg/L, (4) mixed radioactive/hazardous wastes, and (5) RCRA hazardous wastes that contain naturally occurring radioactive materials. 

---