One pink solid (X) has the formula CoCl3.5NH3.H2O.A solution of this salt (X) in water is also pink and precipitates 3 mole AgCl on treatment with silver nitrate solution. When the pink solid (X) is heated, it loses 1moleH2O to yield a purple solid (Y) with the same molar ratio of NH3:Cl:Co. The purple solid releases two of its chlorides rapidly on dissolution and after treatment with AgNO3 solution. The coordination number of cobalt in complexes (X) and (Y) is six. The IUPAC name of pink (X) and purple (Y) complexes respectively are: