Chemistry - Coordination Chemistry Question with Solution | TestHub

(i)$\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]{\mathrm{Cl}}_3:$Hexaaquachromium$\left(\mathrm{III}\right)$chloride

$\mathrm{x}+6\times 0+\left(-1\right)\times 3=0$

$\mathrm{x}=+3$

(ii)$\left[\mathrm{Cr}{\left({\mathrm{C}}_6{\mathrm{H}}_6\right)}_2\right]:\mathrm{bis}\mathrm{ }\left({\mathrm{\eta }}^6-\mathrm{benzene}\right)$chromium$\left(0\right)$

$\mathrm{y}+2\times 0=0$

$\mathrm{y}=0$

(iii)${\mathrm{K}}_2\left[\mathrm{Cr}{\left(\mathrm{CN}\right)}_2{\left(\mathrm{O}\right)}_2\left({\mathrm{O}}_2\right)\left({\mathrm{NH}}_3\right)\right]:$Potassium amminedicyanido dioxide peroxide chromate$\left(\mathrm{VI}\right)$

$2\times 1+\mathrm{z}+2\times \left(-1\right)+2\times \left(-2\right)+\left(-2\right)+0=0$

$\mathrm{z}=+6$

The oxidation states of$\mathrm{Cr}$in$\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]{\mathrm{Cl}}_3,\mathrm{ }\left[\mathrm{Cr}{\left({\mathrm{C}}_6{\mathrm{H}}_6\right)}_2\right]$and${\mathrm{K}}_2\left[\mathrm{Cr}{\left(\mathrm{CN}\right)}_2{\left(\mathrm{O}\right)}_2\left({\mathrm{O}}_2\right)\left({\mathrm{NH}}_3\right)\right]$, respectively, are$+3, 0$and$+6$.