Question

The chemical compositions of various coordination compounds are given in column-I as per Werners theory. Match these coordination compounds with the appropriate options given in column-II.

Answer 1

(A) Silver nitrate reacts with chloride ion present in the ionization sphere to form white ppt of AgCl.
$CoC{l}_3.6N{H}_3⟶\left[\stackrel{|||}{Co}\right(N{H}_3{)}_6\left]C{l}_3\stackrel{aq.}{\rightleftharpoons }\right[CO\left(N{H}_3\right)6{]}^{3+}+3C{l}^{-};3A{g}^{+}3C{l}^{-}⟶3AgCl\downarrow$ (white)
The oxidation state of Co is +3.
$\left[\stackrel{|||}{Co}\right(N{H}_3{)}_6{]}^{3+};3d^6$ configuration and therefore, complex is diamagnetic with $d^{2}s{p}^3$ hybridisation of centralmetal ion. It does not show isomerism.
(B) Silver nitrate reacts with chloride ion present in the ionization sphere to form white ppt of AgCl.
$PdC{l}_2.4N{H}_3⟶\left[\stackrel{|||}{Pd}\right(N{H}_3{)}_4\left]C{l}_2\stackrel{aq.}{\rightleftharpoons }\right[Pd\left(N{H}_3{)}_4^{2+}\right]+2C{l}^{-};2A{g}^{+}+2C{l}^{-}⟶2AgCl\downarrow \left(white\right)$
The oxidation state of Pd is +2 $4d^8$ configuration and therefore complex is
diamagnetic with $ds{p}^2$ hybridisation of central metal ion. It does not show isomerism.
(C) Silver nitrate reacts with chloride ion present in the ionization sphere to form white ppt of AgCl.
$NiC{l}_2.6H_{2}O⟶\left[\stackrel{|||}{Ni}\right(H_{2}O{)}_6\left]C{l}_2\stackrel{aq.}{\rightleftharpoons }\right[Ni(H_{2}O{)}_6{]}^{2+}+2C{l}^{-};2A{g}^{+}+2C{l}^{-}⟶2AgCl\downarrow$ (white)
The oxidation state of Ni is +2.
$\left[\stackrel{|||}{Ni}\right(H_{2}O{)}_6{]}^{2+};3d^6$ configuration and therefore, complex is paramagnetic (n =2) with $s{p}^3{d}^2$ hybridisationof central metal ion. $\left[\stackrel{|||}{Ni}\right(H_{2}O{)}_6]C{l}_2$ and $\left[\stackrel{|||}{Ni}\right(H_{2}O{)}_5]Cl$. $H_{2}O$ are hydrate isomers.
(D) $PtC{l}_4.2HCl⟶H_2\left[\stackrel{IV}{Pt}C{l}_6\right]\stackrel{aq.}{\rightleftharpoons }2H^{+}[PtC{l}_6{]}^{2-},5d^6$ configuration and therefore, complex is diamagnetic with $d^{2}s{p}^3$ hybridisation. It does not show isomerism.
The oxidation state of Pt is +4.