Main_Group_Chemistry

Main Group Chemistry Synthesis And Stroichiometries Of Polyhalide Ions Via Gravimetric And Potentiometric Analyses Introduction Halides are an important class of compounds, which have many different applications in chemistry. In most cases we come across halides in the –1 oxidation state (x-), however some of the heavier halogens are easily oxidised as their outermost electrons are only loosely held by weak forces, and thus can be found in the higher oxidation states. This is due to the halogens being bound to electronegative elements such as oxygen. Halogens themselves are electronegative and hence it is possible to form a wide range of interhalogen compounds. It is possible to form positively and negatively charged interhalogen complexes. Negatively charged interhalogen complexes are called polyhalide ions. There are lots of examples of such anions containing only halogen atoms. There are formed by the addition of halogen molecules to simple halides. For example, the addition of F2 to Kbr might be expected to form the polyhalide anions [BrF2]-, [BrF4]-, [BrF6]-. Homoleptic polyhalides such as I3- can be formed from the addition of I2 to the simple ionic halide KI. In all of the interhalogen compounds, the heavier halogen that forms the central atom is most oxidised. While there are a wide-range cm3, solution, experiment, silver, product, iodine, part, minutes, iodide, flask, analysis, yellow, precipitate, nitrate, mixture, mass, grams, formed, crucible, compounds, chlorine, added, titrations, off, moles, filtered, cooled, before, 20, using, steam, salt, potentiometric, polyhalide