Interhalogens metal halides

See Halogens or Interhalogens Metal halides Metal oxides Non-metal oxides, all above Ammonium nitrate Metals MRH 4.15/64... 

There have not been any accidents recorded that have mentioned metal halides (except with interhalogens , which are very reactive anyway). Nevertheless, it seems important that calcium should not be in contact with such halides without taking any precautions. It was noticed that calcium starts glowing when it is heated with boron trifluoride. 

The presence of the potassium atoms causes the distance between the layers of carbon atoms to increase from the value of 235 pm in graphite to 540 pm in C8K. When rubidium and cesium atoms are placed between the layers, the distances between the carbon layers are 561 and 595 pm, respectively. As would be expected for materials that contain atoms of an alkali metal, these materials are extremely reactive in air, and they react explosively with water. A large number of other intercalation compounds have been prepared that have halogens, interhalogens, or metal halides as the included substances. 

Neutral interhalogens can be prepared in a variety of ways, including direct reaction of the elements (the favored product often depending on the ratio of halogens used) and reaction of halogens with metal halides or other halogenating agents. Examples include... 

Nonsolvating solvents may be used for nonelectrolyte molecular species such as rare gases, halogens, interhalogen compounds, and some metal halide complexes. 

Table 2. Physical properties of transition metal halides. The heat of formation data was taken from [99C] and the stmctural data from [65Wj. The structures listed are for the most stable phase at 300 K. The column labeled "Minimum Interhalogen Distance" lists the halogen nearest neighbor separations for those halides that form structures with close-packed halogen planes.

The halogens involved may or may not be of the same kind. Although compounds formed from these anions tend to be unstable, decomposing to a metal halide and neutral halogen or interhalogen molecule, stabilities may be enhanced by the presence of large cations, such as Cs+ or tetraalkylammonium ions (R4N+). 

The interhalogens have properties intermediate between those of the constituent halogens. Nonmetals form covalent halides metals tend to form ionic halides. The oxoacids of chlorine are all oxidizing agents both acidity and oxidizing strength of oxoacids increase as the oxidation number of the halogen increases. 

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