A complex is represented as $\mathrm{C}\mathrm{o}\mathrm{C}{\mathrm{l}}_3.\mathrm{x}{\mathrm{H}}_2\mathrm{O}$. Its $\text{0}\text{.1}\text{m}$ solution in aqueous medium shows $\mathrm{\Delta }{\mathrm{T}}_{\mathrm{f}}=\mathrm{ }0.558\mathrm{ }\mathrm{K}$. ${\mathrm{K}}_{\mathrm{f}}$ for water is $1.86\mathrm{ }\mathrm{k}\mathrm{g}\mathrm{ }{\mathrm{m}\mathrm{o}\mathrm{l}}^{–1}\mathrm{ }\mathrm{K}$ and assuming $\text{100\%}$ ionisation of the complex having coordination number $\text{6}$. The formula of the complex is