Consider the following metal complexes: [ Co ( NH_3)_6]^3+ [ CoCl ( NH_3)_5]^2+ [ Co ( CN )_6]^3- [ Co ( NH_3)_5( H_2 O )]^3+ The spin-only magnetic…

Consider the following metal complexes : $$\begin{aligned} & {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}} \\ & {\left[\mathrm{CoCl}\left(\mathrm{NH}_3\right)_5\right]^{2+}} \\ & {\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}} \\ & {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{H}_2 \mathrm{O}\right)\right]^{3+}} \end{aligned} $$ The spin-only magnetic moment value of the complex that absorbes light with shortest wavelength is \_\_\_\_ B.M. (Nearest integer)