Cobalt bromide, naming

These reactions result in an additional route of chain propagation, which allows one to exceed the rate limit due to the mechanism of action of only variable-valence ions. In fact, the initial rate of RH transformation in the presence of the cobalt bromide catalyst is determined by the rate of two reactions, namely, R02 with RH (kp) and R02 with Co2+ (kp), followed by the reactions of Co3+ with Br and Br with RH. The general scheme proposed by Zakharov includes the following steps (written in the simplified form) [206] ... 

That is, a mixture of 1-, 2-diaquo-tetrammino-cobaltic chloride and 1-, 2-diehloro-tetranimino-cobaltic chloride is formed. The aquo-salt is readily soluble in water but the diehloro-salt sparingly so. The last named forms intense blue crystals which are contaminated with small quantities of the praseo-salt, from which it may be freed by transforming it into the dithionate. The dithionate is practically insoluble, but the chloride may be regenerated from it by rubbing it with ammonium chloride. The bromide, the iodide, and the nitrate have all been prepared. 

Another method consists in adding ammonia to the impure bromide in aqueous solution, whereby nickel bromide hexammoniate, NiBr2.6XH3, separates out in beautiful violet crystals. Since cobalt does not yield a similar derivative under like conditions, a very pure salt of nickel may be obtained in this way.2 The hexammoniate of nickel chloride, namely, NiCl .6NH3, may similarly be used. 

For the compound represented by the formula [Co(NH3)5S04]Br the name pentammine-sulfatocobalt(III) bromide indicates clearly that the sulfate group is monocoordinated if a maximum coordination number of six is accepted for cobalt. 

The history of the BP PTA process began in 1955 with the discovery by Scientific Design/Mid-Century Corporation of a homogeneous oxidation catalyst of combinations of cobalt(II) and manganese(II) salts and a source of bromide, and thus, the oxidation process is known by the name MC oxidation [3-6]. Patents disclosing the oxidation process were later purchased by the Standard... 

Greek prefixes (di-, tri-, tetra-, penta-, hexa-) are used to indicate the number of each kind of ligand when more than one is present. If the ligand contains a Greek prefix (for example, ethylenediamine) or is polydentate, the alternate prefixes bis-, tris-, tetrakis-, pentakis-, and hexakis- are used and the ligand name is placed in parentheses. For example, the name for [Co(en)3]Br3 is tris(ethylenediamine)-cobalt(III) bromide. 

---